Document:

SECURITIES
      PURCHASE AGREEMENT

    

    SECURITIES
      PURCHASE AGREEMENT
      (the
“Agreement”),
      dated
      as of June 18, 2007, among SIONIX CORPORATION, a corporation organized under
      the
      laws of the State of Nevada (“Sionix”),
      and
[investors
      to be identified by Southridge Investment Group, LLC] (collectively,
      “Purchaser”).

    

    WHEREAS,
      Purchaser and Sionix are executing and delivering this Agreement in reliance
      upon the exemption from securities registration afforded by Section 4(2) of
      the
      Securities Act of 1933, as amended (the “1933
      Act”);

    

    WHEREAS,
      Purchaser desires to purchase, and Sionix desires to issue, upon the terms
      and
      conditions set forth in this Agreement, a subordinated convertible debenture
      and
      a common stock warrant of Sionix in consideration for the payment by Purchaser
      to Sionix of up to [one
      million dollars ($1,000,000.00)]
      in cash;
      and

    

    NOW
      THEREFORE,
      in
      consideration of the premises and the mutual covenants contained herein and
      other good and valuable consideration, the receipt and sufficiency of which
      are
      hereby acknowledged, the parties agree as follows:

     

    
      1.  PURCHASE
        AND SALE OF SUBORDINATED CONVERTIBLE
        DEBENTURE.

    

    

    a.  Purchase
      of Subordinated Convertible Debenture.
      On the
      Closing Date (as defined below), Sionix shall issue and deliver to Purchaser,
      and Purchaser agrees to purchase from Sionix, (i) a duly executed 8%
      subordinated convertible debenture in the principal amount of up to [one
      million dollars ($1,000,000)]
      (the
“Debenture”)
      and
      (ii) a stock warrant to purchase __________ [insert
      number for 50% warrant coverage]
      shares
      of Sionix common stock (the “Warrant”)
      in
      consideration for $[1,000,000.00]
      cash
      (the “Purchase
      Price”).

    

    b.  Closing
      Date.
      Subject
      to the satisfaction (or waiver) of the conditions thereto set forth in Section
      5
      and Section 6 below, the date and time of the sale of the Debenture pursuant
      to
      this Agreement (the “Closing
      Date”)
      shall
      be 12:00 noon New York City Time on June 18, 2007 or such other mutually agreed
      upon time. The closing of the transactions contemplated by this Agreement (the
      “Closing”)
      shall
      occur on the Closing Date at such location as may be agreed to by the
      parties.

    

    c.  Form
      of Payment.
      On the
      Closing Date, (i) Purchaser shall pay the Purchase Price in United States
      dollars by wire transfer of immediately available funds to an account designated
      in writing by Sionix for such purpose, against delivery of the Debenture and
      the
      Warrant, and (ii) Sionix shall deliver to Purchaser the Debenture and Warrant
      duly executed on behalf of Sionix, against delivery of the Purchase
      Price.

     

    
      2.  PURCHASER’S
        REPRESENTATIONS AND WARRANTIES.
        Purchaser represents and warrants to Sionix
        that:

    

     

    
      
         

      

      
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    a.  Accredited
      Purchaser; Investment Purpose.
      Purchaser represents that it is an “Accredited Investor” as defined in
      Regulation D under the 1933 Act. Purchaser is purchasing the Debenture for
      its
      own account for investment purposes only and not with a view toward, or for
      resale in connection with, the public sale or distribution thereof, except
      pursuant to sales registered or exempted under the 1993 Act and applicable
      state
      securities laws; provided,
      however,
      that by
      making the representations herein, Purchaser does not agree to hold the
      Debenture for any minimum or other specific term and reserves the right to
      dispose of the Debenture at any time in accordance with or pursuant to a
      registration statement or an exemption under the 1933 Act and applicable state
      securities laws.

    

    b.  Reliance
      on Exemptions.
      Purchaser understands that the Debenture is being offered and sold to it in
      reliance upon specific exemptions from the registration requirements of United
      States federal and state securities laws and that Sionix is relying upon the
      truth and accuracy of, and Purchaser’s compliance with, the representations,
      warranties, agreements, acknowledgments and understandings of Purchaser set
      forth herein in order to determine the availability of such exemptions and
      the
      eligibility of the Purchaser to acquire the Debenture.

    

    c.  Information.
      Purchaser and its advisors, if any, have been furnished with materials relating
      to the business, finances and operations of Sionix and materials relating to
      the
      offer and sale of the Debenture which have been requested by Purchaser or its
      advisors. Neither such inquiries nor any other due diligence investigation
      conducted by Purchaser or any of its advisors or representatives shall modify,
      amend or affect Purchaser’s right to rely on Sino’s representations and
      warranties contained in Section 3 below. Purchaser understands that its
      investment in the Debenture involves a significant degree of risk.

    

    d.
         Governmental
      Review.
      Purchaser understands that no United States federal or state agency or any
      other
      government or governmental agency has passed upon or made any recommendation
      or
      endorsement of the Debenture.

    

    e.  Transfer
      or Resale.
      Purchaser understands that (i) the sale or resale of the Debenture and the
      Warrant and any underlying conversion shares of common stock has not been and
      is
      not being registered under the 1933 Act or any applicable state securities
      laws,
      and the Debenture and the Warrant may not be transferred unless (a) the
      Debenture, the Warrant and the common stock, par value $0.001 per share, of
      Sionix, issuable upon conversion of the Debenture (the “Conversion
      Shares”)
      and
      upon exercise of the Warrant (the “Warrant
      Shares”)
      are
      sold pursuant to an effective registration statement under the 1933 Act, (b)
      the
      Debenture, the Warrant, the Conversion Shares and the Warrant Shares are sold
      or
      transferred pursuant to an exemption from such registration, (c) the Debenture,
      the Warrant, the Conversion Shares and the Warrant Shares are sold or
      transferred to an “affiliate” (as defined in Rule 144 promulgated under the 1933
      Act (or a successor rule) (“Rule
      144”))
      of
      Purchaser who agrees to sell or otherwise transfer the Debenture or the Warrant
      only in accordance with this Section 2(e) and who is an Accredited Investor,
      or
      (d) the Debenture, the Warrant, the Conversion Shares and the Warrant Shares
      are
      sold pursuant to Rule 144, if such Rule is available; (ii) any sale of such
      Debenture, Warrant, Conversion Shares and Warrant Shares made in reliance on
      Rule 144 may be made only in accordance with the terms of said Rule and further,
      if said Rule is not applicable, any resale of such Debenture, Warrant,
      Conversion Shares and Warrant Shares under circumstances in which the seller
      (or
      the person through whom the sale is made) may be deemed to be an underwriter
      (as
      that term is defined in the 1933 Act) may require compliance with some other
      exemption under the 1933 Act or the rules and regulations of the SEC thereunder;
      and (iii) neither Sionix nor any other person is under any obligation to comply
      with the terms and conditions of any exemption under the 1933 Act.

     

    
      
         

      

      
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    f.  Legends.
      Purchaser understands that the Debenture, the Warrant, the Conversion Shares
      and
      the Warrant Shares shall bear a restrictive legend in the following
      form:

    

    “NEITHER
      THIS SECURITY NOR THE SECURITIES ISSUABLE UPON CONVERSION HEREOF HAVE BEEN
      REGISTERED WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION OR THE
      SECURITIES COMMISSION OF ANY STATE OR UNDER THE SECURITIES ACT OF 1933, AS
      AMENDED. THE SECURITIES ARE RESTRICTED AND MAY NOT BE OFFERED, RESOLD, PLEDGED
      OR TRANSFERRED EXCEPT AS PERMITTED UNDER THE ACT PURSUANT TO REGISTRATION OR
      EXEMPTION OR SAFE HARBOR THEREFROM.”

    

    g.  Authorization;
      Enforcement.
      This
      Agreement has been duly and validly authorized by Purchaser. This Agreement
      has
      been duly executed and delivered on behalf of Purchaser, and this Agreement
      constitutes a valid and binding agreement of Purchaser enforceable in accordance
      with its terms, except as such enforceability may be limited by applicable
      bankruptcy, insolvency, reorganization, moratorium, liquidation or similar
      laws
      relating to, or affecting generally, the enforcement of creditors’ rights and
      remedies or by other equitable principles of general application. 

    

    h.  No
      Brokers.
      Purchaser has taken no action which would give rise to any claim by any person
      for brokerage commissions, finder’s fees or similar payments relating to this
      Agreement or the transactions contemplated hereby.

     

    
      3.  REPRESENTATIONS
        AND WARRANTIES OF SIONIX.
        Sionix
        represents and warrants to Purchaser that:

    

    

    a.  Authorization;
      Enforcement.
      (i)
      Sionix has all requisite corporate power and authority to enter into and perform
      this Agreement and to consummate the transactions contemplated hereby and to
      sell the Debenture and the Warrant in accordance with the terms hereof, (ii)
      the
      execution and delivery of this Agreement by Sionix and the consummation by
      it of
      the transactions contemplated hereby (including without limitation, the sale
      of
      the Debenture to Purchaser) have been duly authorized by Sionix and no further
      consent or authorization of Sionix or its shareholders is required, (iii) this
      Agreement has been duly executed and delivered by Sionix, and (iv) this
      Agreement constitutes a legal, valid and binding obligation of Sionix
      enforceable against Sionix in accordance with its terms, except as such
      enforceability may be limited by applicable bankruptcy, insolvency,
      reorganization, moratorium, liquidation or similar laws relating to, or
      affecting generally, the enforcement of creditors’ rights and remedies or by
      other equitable principles of general application

     

    
      
         

      

      
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    b.  No
      Conflicts.
      The
      execution, delivery and performance of this Agreement by Sionix and the
      consummation by Sionix of the transactions contemplated hereby (including,
      without limitation, the sale of the Debenture and Warrant to Purchaser) will
      not
      (i) conflict with or result in a violation of any provision of its certificate
      of formation or other organizational documents, or (ii) violate or conflict
      with, or result in a breach of any provision of, or constitute a default (or
      an
      event which with notice or lapse of time or both could become a default) under,
      or give to others any rights of termination, amendment, acceleration or
      cancellation of, any agreement, note, bond, indenture or other instrument to
      which Sionix is a party, or (iii) result in a violation of any law, rule,
      regulation, order, judgment or decree (including federal and state securities
      laws and regulations and regulations of any self-regulatory organizations to
      which Sionix is subject) applicable to Sionix or by which any property of Sionix
      are bound or affected. Except as specifically contemplated by this Agreement
      and
      as required under the 1933 Act and any applicable federal and state securities
      laws, Sionix is not required to obtain any consent, authorization or order
      of,
      or make any filing or registration with, any court, governmental agency,
      regulatory agency, self regulatory organization or stock market or any third
      party in order for it to execute, deliver or perform any of its obligations
      under this Agreement in accordance with the terms hereof. Except for filings
      that may be required under applicable federal and state securities laws in
      connection with the issuance and sale of the Debenture and the Warrant, all
      consents, authorizations, orders, filings and registrations which Sionix is
      required to obtain pursuant to the preceding sentence have been obtained or
      effected on or prior to the date hereof.

    

    c.  No
      Brokers.
      Sionix
      has taken no action which would give rise to any claim by any person for
      brokerage commissions, finder’s fees or similar payments relating to this
      Agreement or the transactions contemplated hereby except as disclosed in this
      Section 3(c): 

    

    Southridge
      Investment Group LLC is entitled to those cash and equity fees as provided
      for
      in that certain Investment Banking Engagement Letter dated as of February 12,
      2007, as modified by that certain Investment Banking Engagement Letter Addendum
      dated as of May 29, 2007.

    

    d.  Issuance
      of Securities.
      The
      issuance of the Debenture and the Warrant are duly authorized and upon issuance
      in accordance with the terms hereof shall be free from all taxes, liens and
      charges with respect to the issue thereof. As of the Closing, a number of shares
      of Common Stock shall have been duly authorized and reserved for issuance which
      equals or exceeds 130% of the aggregate of the maximum number of shares of
      Common Stock issuable (i) upon conversion of the Debenture and (ii) upon
      exercise of the Warrant. Upon conversion or exercise in accordance with the
      Debenture or the Warrant, as the case may be, the Conversion Shares and the
      Warrant Shares, respectively, will be validly issued, fully paid and
      nonassessable and free from all preemptive or similar rights, taxes, liens
      and
      charges with respect to the issue thereof, with the holders being entitled
      to
      all rights accorded to a holder of Common Stock. Assuming the accuracy of each
      of the representations and warranties set forth in Section 2 of this Agreement,
      the offer and issuance by the Company of the Debenture and the Warrant is exempt
      from registration under the 1933 Act.

     

    
      
         

      

      
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        4.  COVENANTS.

      

    

    

    a.  Best
      Efforts.
      The
      parties shall use their best efforts to satisfy timely each of the conditions
      described in Section 5 and Section 6 of this Agreement.

    

      b.  Financial
        Reporting. Subsequent
        to Closing Date, Sionix will take no action which would adversely affect
        Purchaser’s ability to use Rule 144. Sionix shall make
        and
        keep public information available, as those terms are understood and defined
        in
        Rule 144 and shall file with the SEC in a timely manner all reports and other
        documents required of Sionix
        under
        the 1933 Act and the Securities Exchange Act of 1934, as
        amended.

    

     

    c.  Reservation
      of Shares.
      Sionix
      shall
      take
      all action necessary to at all times have authorized, and reserved for the
      purpose of issuance, no less than 130% of the sum of the number of shares of
      Common Stock issuable (i) upon conversion of the Debenture issued at the Closing
      and (ii) upon exercise of the Warrant issued at the Closing (without taking
      into
      account any limitations on the conversion of the Debenture or exercise of the
      Warrant set forth in the Debenture and Warrant, respectively).

     

    
      5.  CONDITIONS
        TO SIONIX’S OBLIGATION TO SELL.
        The
        obligation of Sionix hereunder to sell and deliver the Debenture and the
        Warrant
        to Purchaser at the Closing is subject to the satisfaction, at or before
        the
        Closing Date of each of the following conditions thereto, provided that these
        conditions are for Sionix’s sole benefit and may be waived by Sionix at any time
        in its sole discretion:

    

    

    a.  Purchaser
      shall have executed this Agreement and delivered the same to
      Sionix.

    

    b.  Purchaser
      shall have delivered the Purchase Price in accordance with Section 1(c)
      above.

    

    c.  Purchaser
      shall have executed the Registration Rights Agreement between Sionix and
      Purchaser, dated as of the date of the Closing, in substantially the form of
      Exhibit
      A
      attached
      to this Agreement (the “Registration Rights Agreement”), and delivered the same
      to Sionix.

    

    d.  The
      representations and warranties of Purchaser shall be true and correct in all
      material respects as of the date when made and as of the Closing Date as though
      made at that time (except for representations and warranties that speak as
      of a
      specific date), and Purchaser shall have performed, satisfied and complied
      in
      all material respects with the covenants, agreements and conditions required
      by
      this Agreement to be performed, satisfied or complied with by Purchaser at
      or
      prior to the Closing Date.

     

    
      
         

      

      
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    e.  No
      litigation, statute, rule, regulation, executive order, decree, ruling or
      injunction shall have been enacted, entered, promulgated or endorsed by or
      in
      any court or governmental authority of competent jurisdiction or any
      self-regulatory organization having authority over the matters contemplated
      hereby which prohibits the consummation of any of the transactions contemplated
      by this Agreement.

     

    
      6.  CONDITIONS
        TO PURCHASER’S OBLIGATION TO PURCHASE.
        The
        obligation of Purchaser hereunder to purchase the Debenture at the Closing
        is
        subject to the satisfaction, at or before the Closing Date of each of the
        following conditions, provided that these conditions are for Purchaser’s sole
        benefit and may be waived by Purchaser at any time in its sole
        discretion.

    

    

    a.  Sionix
      shall have executed this Agreement and delivered the same to
      Purchaser.

    

    b.  Sionix
      shall have delivered to Purchaser duly executed Debenture and Warrant (in such
      denominations as Purchaser shall reasonably request) in accordance with Section
      1(c) above.

    

    c.  Sionix
      shall have executed the Registration Rights Agreement and delivered the same
      to
      Purchaser.

    

    d.  The
      representations and warranties of Sionix shall be true and correct in all
      material respects as of the date when made and as of the Closing Date as though
      made at such time (except for representations and warranties that speak as
      of a
      specific date) and Sionix shall have performed, satisfied and complied in all
      material respects with the covenants, agreements and conditions required by
      this
      Agreement to be performed, satisfied or complied with by Sionix at or prior
      to
      the Closing Date.

    

    e.  No
      litigation, statute, rule, regulation, executive order, decree, ruling or
      injunction shall have been enacted, entered, promulgated or endorsed by or
      in
      any court or governmental authority of competent jurisdiction or any
      self-regulatory organization having authority over the matters contemplated
      hereby which prohibits the consummation of any of the transactions contemplated
      by this Agreement.

     

    
      7.  GOVERNING
        LAW; MISCELLANEOUS. 

    

     

    
      
         

      

      
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    a.  Governing
      Law; Jurisdiction.
      THIS
      AGREEMENT SHALL BE ENFORCED, GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
      LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED
      ENTIRELY WITH SUCH STATE, WITHOUT REGARD TO THE PRINCIPLES OF CONFLICT OF LAWS.
      THE PARTIES HERETO HEREBY SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE UNITED
      STATES FEDERAL COURTS LOCATED IN THE CITY OF NEW YORK, NEW YORK WITH RESPECT
      TO
      ANY DISPUTE ARISING UNDER THIS AGREEMENT, THE AGREEMENTS ENTERED INTO IN
      CONNECTION HEREWITH OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY. BOTH
      PARTIES IRREVOCABLY WAIVE THE DEFENSE OF AN INCONVENIENT FORUM TO THE
      MAINTENANCE OF SUCH SUIT OR PROCEEDING. BOTH PARTIES FURTHER AGREE THAT SERVICE
      OF PROCESS UPON A PARTY MAILED BY FIRST CLASS MAIL SHALL BE DEEMED IN EVERY
      RESPECT EFFECTIVE SERVICE OF PROCESS UPON THE PARTY IN ANY SUCH SUIT OR
      PROCEEDING. NOTHING HEREIN SHALL AFFECT ANY PARTY’S RIGHT TO SERVE PROCESS IN
      ANY OTHER MANNER PERMITTED BY LAW. THE PARTIES AGREE THAT A FINAL NON-APPEALABLE
      JUDGMENT IN ANY SUCH SUIT OR PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED
      IN OTHER JURISDICTIONS BY SUIT ON SUCH JUDGMENT OR IN ANY OTHER LAWFUL MANNER.
      THE PARTIES HEREBY WAIVE A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR
      COUNTERCLAIM BROUGHT BY EITHER OF THE PARTIES HERETO AGAINST THE OTHER IN
      RESPECT OF ANY MATTER ARISING OUT OF OR IN CONNECTION WITH THIS
      AGREEMENT.

    

    b.  Attorneys’
      Fees.
      At the
      Closing, Sionix shall reimburse the Purchaser for its reasonable counsel’s fees,
      incurred in connection with the preparation of this Agreement and the other
      agreements related hereto, and the investigation of and the consummation of
      the
      transactions contemplated hereby, in a sum not to exceed $10,000, which fee
      may
      be disbursed directly at Closing from escrow.

    

    c.  Counterparts;
      Signatures by Facsimile.
      This
      Agreement may be executed in one or more counterparts, each of which shall
      be
      deemed an original but all of which shall constitute one and the same agreement
      and shall become effective when counterparts have been signed by each party
      and
      delivered to the other party. This Agreement, once executed by a party, may
      be
      delivered to the other party hereto by facsimile transmission or electronic
      mail
      transmission of a copy of this Agreement bearing the signature of the party
      so
      delivering this Agreement. A
      facsimile or electronic mail transmission of this signed Agreement shall be
      legal and binding on all parties hereto. 

    

    d.  Headings.
      The
      headings of this Agreement are for convenience of reference only and shall
      not
      form part of, or affect the interpretation of, this Agreement.

    

    e.  Severability.
      In the
      event that any provision of this Agreement is invalid or enforceable under
      any
      applicable statute or rule of law, then such provision shall be deemed
      inoperative to the extent that it may conflict therewith and shall be deemed
      modified to conform with such statute or rule of law. Any provision hereof
      which
      may prove invalid or unenforceable under any law shall not affect the validity
      or enforceability of any other provision hereof.

    

    f.  Entire
      Agreement; Amendments.
      This
      Agreement and the instruments referenced herein contain the entire understanding
      of the parties with respect to the matters covered herein and therein and,
      except as specifically set forth herein or therein, neither Sionix nor Purchaser
      makes any representation, warranty, covenant or undertaking with respect to
      such
      matters. No provision of this Agreement may be waived or amended other than
      by
      an instrument in writing signed by the party to be charged with
      enforcement.

     

    
      
         

      

      
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    g.  Notices.
      Any
      notices required or permitted to be given under the terms of this Agreement
      shall be sent by certified or registered mail (return receipt requested) or
      delivered personally or by courier (including a recognized overnight delivery
      service) or by facsimile or by electronic mail either in the text of an email
      message or attached in a commonly readable format, and shall be effective five
      days after being placed in the mail, if mailed by regular United States mail,
      or
      upon receipt, if delivered personally, by courier (including a recognized
      overnight delivery service) or by facsimile, or one day after electronically
      mailed if the sender has received no generated notice that the email message
      has
      not been successfully delivered, in each case addressed to a party. The
      addresses for such communications shall be:

    

    If
      to
      Sionix:

    

    2082
      Michelson Drive, Suite 304

    Irvine,
      CA 92612

    Attention:
      _______________

    Facsimile:
      (949)
      752-7998

    Email:

    

    with
      a
      copy to:

    

    ____________________

    ____________________

    ____________________

    Attention: 

    Facsimile:
      

    Email:
      

     

    If
      to
      Purchaser:

    

    ____________________

    ____________________

    ____________________

    Attention: 

    Facsimile:
      

    Email:
      

    

    with
      a
      copy to:

    

    Gersten
      Savage LLP

    600
      Lexington Avenue, 9th
      Floor

    New
      York,
      NY 10022

    Attention:
      David E. Danovitch, Esq.

    Facsimile:
      (212) 980-5192

    Email:
      ddanovitch@gerstensavage.com

     

    
      
         

      

      
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    Each
      party shall provide notice to the other party of any change in
      address.

    

    h.  Successors
      and Assigns.
      This
      Agreement shall be binding upon and inure to the benefit of the parties and
      their successors and assigns. Neither Sionix nor Purchaser shall assign this
      Agreement or any rights or obligations hereunder without the prior written
      consent of the other. Notwithstanding the foregoing, subject to Section 2(e),
      Purchaser may assign its rights hereunder to any person that purchases the
      Debenture, the Warrant, any Conversion Shares or any Warrant Shares in a private
      transaction from Purchaser or to any of its “affiliates,” as that term is
      defined under the 1933 Act, without the consent of Sionix.

    

    i.  Third
      Party Beneficiaries.
      This
      Agreement is intended for the benefit of the parties hereto and their respective
      permitted successors and assigns, and is not for the benefit of, nor may any
      provision hereof be enforced by, any other person. 

    

    j.  Further
      Assurances.
      Each
      party shall do and perform, or cause to be done and performed, all such further
      acts and things, and shall execute and deliver all such other agreements,
      certificates, instruments and documents, as the other party may reasonably
      request in order to carry out the intent and accomplish the purposes of this
      Agreement and the consummation of the transactions contemplated
      hereby.

    

    k.  No
      Strict Construction.
      The
      language used in this Agreement will be deemed to be the language chosen by
      the
      parties to express their mutual intent, and no rules of strict construction
      will
      be applied against any party.

    

    [Remainder
      of page intentionally left blank.]

     

    
      
         

      

      
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    IN
      WITNESS WHEREOF,
      Purchaser and Sionix have caused this Securities Purchase Agreement to be duly
      executed as of the date first above written.

     

    
      	 	 	PURCHASER:
	 
 	 
 	 
[_________________]
	 	 	
            
	 	 	By: 
	 	
              
                

              

              Name:

            
	 	
              Title:
                

            

    

     

    
      
        	 	 	SIONIX:
	 
 	 
 	 
SIONIX
                CORPORATION
	 	 	
              
	 	 	By: 
	 	
                
                  

                

                Name:

              
	 	
                Title:
                  

              

      

    

     

    
      
         

      

      
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    Exhibit
      A

    

    [Form
      of Registration Rights Agreement]

     

    
      
         

      

      
        -
          11
          -Unassociated Document

    
       

      THIS
        DEBENTURE, AND THE SECURITIES INTO WHICH IT IS CONVERTIBLE (COLLECTIVELY,
        THE “SECURITIES”),
        HAVE
        NOT BEEN REGISTERED WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION
        OR
        THE SECURITIES COMMISSION OF ANY STATE. THE SECURITIES ARE BEING OFFERED
        PURSUANT TO A SAFE HARBOR FROM REGISTRATION UNDER REGULATION D PROMULGATED
        UNDER
        THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”).
        THE
        SECURITIES ARE “RESTRICTED”
AND
        MAY
        NOT BE OFFERED OR SOLD UNLESS THE SECURITIES ARE REGISTERED UNDER THE ACT,
        PURSUANT TO REGULATION D OR PURSUANT TO AVAILABLE EXEMPTIONS FROM THE
        REGISTRATION REQUIREMENTS OF THE ACT AND THE COMPANY WILL BE PROVIDED WITH
        OPINION OF COUNSEL OR OTHER SUCH INFORMATION AS IT MAY REASONABLY REQUIRE
        TO
        CONFIRM THAT SUCH EXEMPTIONS ARE AVAILABLE. FURTHER HEDGING TRANSACTIONS
        INVOLVING THE SECURITIES MAY NOT BE MADE EXCEPT IN COMPLIANCE WITH THE
        ACT.

       

      SUBORDINATED
        CONVERTIBLE DEBENTURE

       

      SIONIX
        CORPORATION

       

      Subordinated
        Convertible Debenture

       

      June
        ___, 2007

       

      
        	
                No.
                  __________

              	
                $[1,000,000]

              

      

      

      THIS
        DEBENTURE IS ONE IN A SERIES OF SUBORDINATED CONVERTIBLE DEBENTURES
        (“DEBENTURE(S)”) ISSUED BY SIONIX CORPORATION PURSUANT TO THAT CERTAIN
        SECURITIES PURCHASE AGREEMENT OF EVEN DATE HEREWITH.

       

      This
        Subordinated Convertible Debenture is issued by Sionix Corporation, a Nevada
        corporation (“Sionix”
or
        the
“Company”),
        to
___________________ (together
        with its permitted successors and assigns, the “Holder”)
        pursuant to exemptions from registration
        under
        the Securities Act of 1933, as amended (the “1933
        Act”).

       

      ARTICLE
        I. 

       

      Section
        1.01  Principal.
        For
        value
        received, on June 18, 2007 (the “Issuance Date”), the Company hereby promises to
        pay to the order of the Holder in lawful money of the United States of America
        and in immediately available funds the principal sum of [one
        million and 00/100 dollars (US$1,000,000)],
        plus
        accrued interest in the amount of eight percent (8%) per year for all
        outstanding principal on June 17, 2008 (the “Maturity Date”). The principal plus
        accrued interest of this Debenture, less any amounts required by law to be
        deducted, is payable monthly, and shall be either paid to the registered
        holder
        of this Debenture (a) in United States dollars, at the address last appearing
        on
        the Debenture Register of the Company as designated in writing by the Holder,
        or
        (b) converted into shares of the Company’s common stock, $0.001 par value per
        share (“Common
        Stock”)
        in
        accordance with Section 1.02 herein; provided,
        however,
        that in
        no event shall the Holder be entitled to convert this Debenture for a number
        of
        shares of Common Stock in excess of that number of shares of Common Stock
        which,
        upon giving effect to such conversion, would cause the aggregate number of
        shares of Common Stock beneficially owned by the Holder and its affiliates
        to
        exceed 4.999% of the outstanding shares of the Common Stock following such
        conversion, as further set forth in Section 6.05 herein. 

       

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

       

      The
        forwarding of a check or wire transfer shall constitute a payment hereunder
        and
        shall satisfy and discharge the liability for principal on this Debenture
        to the
        extent of the sum represented by such check or wire transfer plus any amounts
        so
        deducted; provided,
        however,
        that
        the check has cleared the Holder’s bank account or the payment by wire transfer
        is made in immediately available funds.

       

      Section
        1.02  Optional
        Conversion.
        The
        Holder is entitled, at its option, to convert, and sell on the same day,
        at any
        time and from time to time, until payment in full of this Debenture, all
        or a
        portion of the principal amount of this Debenture plus accrued interest into
        shares of Common Stock (the “Conversion
        Shares”)
        at a
        conversion price for each share of Common Stock equal to $0.22 (the
“Conversion
        Price”).
        The
        amount of shares issuable pursuant to a conversion shall equal the principal
        amount (or portion thereof) of the Debenture to be converted, plus accrued
        interest, divided by the Conversion Price. 

       

      Conversion
        shall be effectuated by surrendering the Debenture to the Company, accompanied
        by or preceded by facsimile or other delivery to the Company of the form
        of
        conversion notice attached hereto as Exhibit
        A,
        executed by the Holder evidencing such Holder's intention to convert a specified
        portion hereof. No fractional shares of Common Stock or scrip representing
        fractions of shares will be issued on conversion, but the number of shares
        issuable shall be rounded to the nearest whole share. The date on which notice
        of conversion is given (the “Conversion
        Date”)
        shall
        be deemed to be the date on which the Holder faxes or otherwise delivers
        the
        conversion notice (the “Notice
        of Conversion”),
        substantially in the form annexed hereto as Exhibit
        A,
        duly
        executed, to the Company. Facsimile delivery of the Notice of Conversion
        shall
        be accepted by the Company at facsimile number (949) 752-7998, Attention:
        ____________. Certificates representing Common Stock upon conversion will
        be
        delivered within three (3) business days from the Conversion Date (the
“Delivery
        Date”).

      

      The
        Company understands that a delay in the issuance of the Conversion Shares
        beyond
        the Delivery Date (as defined in this Section) could result in economic loss
        to
        the Holder. As compensation to the Holder for such loss, the Company agrees
        to
        pay late payments to the Holder for late issuance of the Conversion Shares,
        unless the delay is due to causes beyond the reasonable control of the Company
        or the Company’s Transfer Agent, in accordance with the following schedule
        (where “Number
        of Business Days Late”
refers
        to the number of business days which is beyond three (3) Business Days after
        the
        Delivery Date):

       

      
        
          
          

        

        
          2

          
            

          

        

        
          
          

        

      

       

      
        	
                Number
                  of Business Days Late

              	
                Late
                  Payment For Each $10,000 of Debenture Principal or Interest Amount
                  Being
                  Converted

              
	
                1

              	
                $100

              
	
                2

              	
                $200

              
	
                3

              	
                $300

              
	
                4

              	
                $400

              
	
                5

              	
                $500

              
	
                6

              	
                $600

              
	
                7

              	
                $700

              
	
                8

              	
                $800

              
	
                9

              	
                $900

              
	
                10

              	
                $1,000

              
	
                >
                  10

              	
                $1,000
                  + $200 for each Business Day Late beyond 10
                  days

              

      

      

      As
        used
        herein, “Business
        Day”
means
        any
        day
        that is not a Saturday, Sunday, or legal holiday in the State of New York
        when
        commercial banking institutions are required to be closed.

      

      The
        Company shall pay any payments incurred under this Section in immediately
        available funds upon demand as the Holder’s remedy for such delay. Furthermore,
        in addition to any other remedies which may be available to the Holder, in
        the
        event that the Company fails for any reason to effect delivery of such
        Conversion Shares by close of business on the Delivery Date, unless such
        failure
        is due to causes beyond the Company’s reasonable control or that of its Transfer
        Agent, the Holder will be entitled to revoke the relevant Notice of Conversion
        by delivering a notice to such effect to the Company, whereupon the Company
        and
        the Holder shall each be restored to their respective positions immediately
        prior to delivery of such Notice of Conversion; provided,
        however,
        that an
        amount equal to any payments contemplated by this Section which have accrued
        through the date of such revocation notice shall remain due and owing to
        the
        Converting Holder (as defined below) notwithstanding such revocation.

      

      If,
        by
        the relevant Delivery Date, the Company fails, unless such failure is due
        to
        causes beyond the Company’s reasonable control or that of its Transfer Agent,
        for any reason to deliver the Conversion Shares to be issued upon conversion
        of
        the Debenture and after such Delivery Date, the Holder of the Debenture being
        converted (a “Converting
        Holder”)
        purchases, in an arm’s-length open market transaction or otherwise, shares of
        Common Stock (the “Covering
        Shares”)
        in
        order to make delivery in satisfaction of a sale of Common Stock by the
        Converting Holder (the “Sold
        Shares”),
        which
        delivery such Converting Holder anticipated to make using the shares to be
        issued upon such conversion (a “Buy-In”),
        the
        Converting Holder shall have the right, to require the Company to pay to
        the
        Converting Holder, in addition to and not in lieu of the amounts due hereunder,
        the Buy-In Adjustment Amount (as defined below). 

       

      
        
          
          

        

        
          3

          
            

          

        

        
          
          

        

      

       

      The
        “Buy-In
        Adjustment Amount”
is
        the
        amount equal to the excess, if any, of (x) the Converting Holder's total
        purchase price (including brokerage commissions, if any) for the Covering
        Shares
        over (y) the net proceeds (after brokerage commissions, if any) received
        by the
        Converting Holder from the sale of the Sold Shares. The Company shall pay
        the
        Buy-In Adjustment Amount to the Company in immediately available funds
        immediately upon demand by the Converting Holder. By way of illustration
        and not
        in limitation of the foregoing, if the Converting Holder purchases shares
        of
        Common Stock having a total purchase price (including brokerage commissions)
        of
        $11,000 to cover a Buy-In with respect to shares of Common Stock it sold
        for net
        proceeds of $10,000, the Buy-In Adjustment Amount which Company will be required
        to pay to the Converting Holder will be $1,000.

      

      In
        lieu
        of delivering physical certificates representing the Common Stock issuable
        upon
        conversion, provided the Company’s Transfer Agent is participating in the
        Depository Trust Company (“DTC”)
        Fast
        Automated Securities Transfer program, upon request of the Holder and its
        compliance with the provisions contained in this paragraph, so long as the
        certificates therefore do not bear a legend and the Holder thereof is not
        obligated to return such certificate for the placement of a legend thereon,
        the
        Company shall use its best efforts to cause its transfer agent to electronically
        transmit the Common Stock issuable upon conversion to the Holder by crediting
        the account of Holder’s Prime Broker with DTC through its Deposit Withdrawal
        Agent Commission system.

      

      The
        Holder of the Debenture shall be entitled to exercise its conversion privilege
        with respect to the Debenture notwithstanding the commencement of any case
        under
        11 U.S.C. §101 et seq.
        (the
“Bankruptcy
        Code”).
        In
        the event the Company is a debtor under the Bankruptcy Code, the Company
        hereby
        waives, to the fullest extent permitted, any rights to relief it may have
        under
        11 U.S.C. §362 in respect of such Holder’s conversion privilege. The Company
        hereby waives, to the fullest extent permitted, any rights to relief it may
        have
        under 11 U.S.C. §362 in respect of the conversion of the Debenture.

      

      Section
        1.03  Reservation
        of Common Stock.
        The
        Company shall reserve and keep available out of its authorized but unissued
        shares of Common Stock, solely for the purpose of effecting the conversion
        of
        this Debenture, such number of shares of Common Stock as shall from time
        to time
        be sufficient to effect such conversion, based upon the Conversion Price.
        If at
        any time the Company does not have a sufficient number of Conversion Shares
        authorized and available, then the Company shall call and hold a special
        meeting
        of its stockholders within sixty (60) days of that time for the sole
        purpose of increasing the number of authorized shares of Common
        Stock.

       

      Section
        1.04  Registration
        Rights.
        The
        Company is obligated to register the resale of the Conversion Shares under
        the
        1933 Act, pursuant to the terms of a Registration Rights Agreement, between
        the
        Company and the Holder of even date herewith (the “Registration
        Rights Agreement”).

       

      Section
        1.05  Paying
        Agent and Registrar.
        Initially, the Company will act as paying agent and registrar. The Company
        may
        change any paying agent, registrar, or Company-registrar by giving the Holder
        not less than ten (10) business days’ written notice of its election to do
        so, specifying the name, address, telephone number and facsimile number of
        the
        paying agent or registrar. The Company may act in any such
        capacity.

       

      
        
          
          

        

        
          4

          
            

          

        

        
          
          

        

      

       

      Section
        1.06  Denominations.
        The
        Debenture is issuable in denominations of Ten Thousand Dollars (US$10,000)
        and
        integral multiples thereof. The Debenture is exchangeable for an equal aggregate
        principal amount of Debenture of different authorized denominations, as
        requested by the Holder surrendering the same. No service charge will be
        made
        for such registration or transfer or exchange.

       

      Section
        1.07  Right
        of Redemption.
        The
        Company shall have the right to redeem this Debenture at any time by providing
        written notice to the Holder by making a cash payment to the Holder of the
        outstanding principal amount of the Debenture multiplied by a premium according
        to the following schedule, plus all accrued interest: 110% of the outstanding
        principal amount if redeemed within 120 days after the Issuance Date; 115%
        of
        the outstanding principal amount if redeemed between 121 days and within
        240
        days after the Issuance Date; 125% of the outstanding principal amount if
        redeemed after 240 days after the Issuance Date. Written notice to the Holder
        shall be received at least 5 business days prior to the date of redemption
        payment (“Redemption Date”). If the redemption payment is not made on or before
        the Redemption Date, the redemption notice shall be rendered null and void
        and
        the Holder thereafter shall have the right to convert any portion of the
        outstanding principal of the Debenture.

       

      Section
        1.08  Subordinated
        Nature Of Debenture.
        This
        Debenture and all payments hereon, including principal or interest, shall
        be
        subordinate and junior in right of payment to the October 2005 senior secured
        bridge.

       

      ARTICLE
        II.  

       

      Section
        2.01  Amendments
        and Waiver of Default.
        The
        Debenture may not be amended. Notwithstanding the above, without the consent
        of
        the Holder, the Debenture may be amended to cure any ambiguity, defect or
        inconsistency, or to provide for assumption of the Company obligations to
        the
        Holder.

       

      ARTICLE
        III.  

       

      Section
        3.01  Events
        of Default.
        The
        following shall constitute an “Event of Default”:

       

      (a) The
        Company shall default in the payment of principal and interest on this Debenture
        and same shall continue for a period of five (5) days; or

       

      (b) Any
        of
        the representations or warranties made by the Company herein, in any certificate
        or financial or other written statements heretofore or hereafter furnished
        by
        the Company in connection with the execution and delivery of this Debenture
        shall be false or misleading in any material respect at the time made;
        or

       

      (c) The
        Company shall fail to perform or observe, in any material respect, any other
        covenant, term, provision, condition, agreement or obligation of the Debenture
        and such failure shall continue uncured for a period of ten (10) days after
        written notice from the Holder of such failure; or

       

      
        
          
          

        

        
          5

          
            

          

        

        
          
          

        

      

       

      (d) The
        Company fails to authorize or to cause its Transfer Agent to issue shares
        of
        Common Stock upon exercise by the Holder of the conversion rights of the
        Holder
        in accordance with the terms of this Debenture, fails to transfer or to cause
        its Transfer Agent to transfer any certificate for shares of Common Stock
        issued
        to the Holder upon conversion of this Debenture and when required by this
        Debenture, and such transfer is otherwise lawful, or fails to remove any
        restrictive legend on any certificate or fails to cause its Transfer Agent
        to
        remove such restricted legend, in each case where such removal is lawful,
        as and
        when required by this Debenture, and any such failure shall continue uncured
        for
        ten (10) business days; or

      

      (e) The
        Company shall (1) admit in writing its inability to pay its debts generally
        as
        they mature; (2) make an assignment for the benefit of creditors or commence
        proceedings for its dissolution; or (3) apply for or consent to the appointment
        of a trustee, liquidator or receiver for its or for a substantial part of
        its
        property or business; or

      

      (f) A
        trustee, liquidator or receiver shall be appointed for the Company or for
        a
        substantial part of its property or business without its consent and shall
        not
        be discharged within sixty (60) days after such appointment; or

      

      (g) Any
        governmental agency or any court of competent jurisdiction at the instance
        of
        any governmental agency shall assume custody or control of the whole or any
        substantial portion of the properties or assets of the Company and shall
        not be
        dismissed within sixty (60) days thereafter; or

      

      (h) Any
        money
        judgment, writ or warrant of attachment, or similar process in excess of
        one
        hundred thousand dollars ($100,000) in the aggregate shall be entered or
        filed
        against the Company or any of its properties or other assets and shall remain
        unpaid, unvacated, unbonded or unstayed for a period of sixty (60) days or
        in
        any event later than five (5) days prior to the date of any proposed sale
        thereunder; or

      

      (i) Bankruptcy,
        reorganization, insolvency or liquidation proceedings or other proceedings
        for
        relief under any bankruptcy law or any law for the relief of debtors shall
        be
        instituted by or against the Company and, if instituted against the Company,
        shall not be dismissed within sixty (60) days after such institution or the
        Company shall by any action or answer approve of, consent to, or acquiesce
        in
        any such proceedings or admit the material allegations of, or default in
        answering a petition filed in any such proceeding; or

      

      (j) The
        Company shall have its Common Stock suspended or delisted from an exchange
        or
        over-the-counter market from trading for in excess of five (5) trading days;
        or

      

      (k) Breach
        by
        the Company of its obligations under the Securities Purchase Agreement, the
        Registration Rights Agreement or any other agreement entered into on the
        date
        hereof between the Company and the Holder which is not cured by the Company
        within ten (10) days after receipt of written notice thereof. 

       

      
        
          
          

        

        
          6

          
            

          

        

        
          
          

        

      

       

      Then,
        or
        at any time thereafter, and in each and every such case, unless such Event
        of
        Default shall have been waived in writing by the Holder (which waiver shall
        not
        be deemed to be a waiver of any subsequent default) at the option of the
        Holder
        and in the Holder's sole discretion, the Holder may consider all obligations
        under this Debenture immediately due and payable within five (5) days of
        notice,
        without presentment, demand, protest or notice of any kinds, all of which
        are
        hereby expressly waived, anything herein or in any note or other instruments
        contained to the contrary notwithstanding, and the Holder may immediately
        enforce any and all of the Holder's rights and remedies provided herein or
        any
        other rights or remedies afforded by law. 

      

      Section
        3.02  Failure
        to Issue Unrestricted Common Stock.
        As
        indicated in Article III Section 3.01, a breach by the Company of its
        obligations under the Registration Rights Agreement shall be deemed an Event
        of
        Default, which if not cured within ten (10) days, shall entitle the Holder
        to accelerate full repayment of all debentures outstanding and accrued interest
        thereon or, notwithstanding any limitations contained in this Debenture and/or
        the Securities Purchase Agreement, to convert all debentures outstanding
        and
        accrued interest thereon into shares of Common Stock pursuant to Section
        1.02
        herein. The Company acknowledges that failure to honor a Notice of Conversion
        shall cause irreparable harm to the Holder. 

       

      ARTICLE
        IV.  

       

      Section
        4.01  Rights
        and Terms of Conversion.
        This
        Debenture, in whole or in part, may be converted at any time following the
        date
        of Closing (as defined in the Securities Purchase Agreement), into shares
        of
        Common Stock at a price equal to the Conversion Price as described in
        Section 1.02 above.

       

      Section
        4.02  Re-issuance
        of Debenture.
        When
        the
        Holder elects to convert a part of the Debenture, then the Company shall
        reissue
        a new Debenture in the same form as this Debenture to reflect the new principal
        amount.

       

      ARTICLE
        V.  

       

      Section
        5.01  Anti-dilution.
        In
        the
        event that the Company shall at any time subdivide the outstanding shares
        of
        Common Stock, or shall issue a stock dividend on the outstanding Common Stock,
        the Conversion Price in effect immediately prior to such subdivision or the
        issuance of such dividend shall be proportionately decreased, and in the
        event
        that the Company shall at any time combine the outstanding shares of Common
        Stock, the Conversion Price in effect immediately prior to such combination
        shall be proportionately increased, effective at the close of business on
        the
        date of such subdivision, dividend or combination as the case may
        be.

       

      
        
          
          

        

        
          7

          
            

          

        

        
          
          

        

      

       

      Section
        5.02  Consent
        of Holder to Sell Capital Stock or Grant Security
        Interests.
        So
        long
        as any of the principal of or interest on this Debenture remains unpaid and
        unconverted, the Company shall not, without the prior consent of the majority
        of
        the Holder(s), issue or sell (i)
        any
        Common Stock or preferred stock of the Company for consideration of less
        than
        the Conversion Price on the date of issuance or (ii) issue or sell any warrant,
        option, right, contract, call, or other security or instrument granting the
        holder thereof the right to acquire Common Stock or preferred stock of the
        Company for consideration of less than the Conversion Price on the date of
        issuance, (iii) enter into any security instrument granting the holder a
        security interest in any of the assets of the Company, or
        (iv)
        file any registration statement on Form S-8.
        However,
        the Company may (i) issue options to its employees in an amount equal to
        15% of
        its then-outstanding shares of common stock pursuant to a valid stock option
        plan providing that such options are not issued at a price that is less than
        the
        market price of the common stock on the date of issuance; (ii) grant a security
        interest in any of its assets in connection with a bank credit facility or
        factoring arrangement; (iii) issue shares of Common Stock or securities
        convertible into Common Stock to a strategic partner pursuant to a joint
        venture
        or other similar agreement; or (iv) file a registration statement on a Form
        S-8
        for a valid stock option plan.

       

      ARTICLE
        VI.  

       

      Section
        6.01  Permitted
        Withholding.
        The
        Company shall be entitled to withhold from all payments of principal of this
        Debenture any amounts required to be withheld under the applicable provisions
        of
        the United States income tax laws or other applicable laws at the time of
        such
        payments, and Holder shall execute and deliver all required documentation
        in
        connection therewith.

       

      Section
        6.02  Absolute
        Obligation of the Company.
        No
        provision of this Debenture shall alter or impair the obligation of the Company,
        which is absolute and unconditional, to pay the principal of this Debenture
        at
        the time, place, and rate, and in the coin or currency, herein prescribed.
        This
        Debenture is a direct obligation of the Company.

       

      Section
        6.03  Transfer.
        This
        Debenture has been issued subject to investment representations of the original
        purchaser hereof and may be transferred or exchanged only in compliance with
        the
        1933 Act, and other applicable state and foreign securities laws. In the
        event
        of any proposed transfer of this Debenture, the Company may require, prior
        to
        issuance of a new Debenture in the name of such other person, that it receive
        reasonable transfer documentation including legal opinions that the issuance
        of
        the Debenture in such other name does not and will not cause a violation
        of the
        1933 Act or any applicable state or foreign securities laws. Prior to due
        presentment for transfer of this Debenture, the Company and any agent of
        the
        Company may treat the person in whose name this Debenture is duly registered
        on
        the Company's Debenture Register as the owner hereof for the purpose of
        receiving payment as herein provided and for all other purposes, whether
        or not
        this Debenture be overdue, and neither the Company nor any such agent shall
        be
        affected by notice to the contrary.

       

      Section
        6.04  Investment
        Purpose. The
        Holder of the Debenture, by acceptance hereof, agrees that this Debenture
        is
        being acquired for investment and that such Holder will not offer, sell or
        otherwise dispose of this Debenture or the shares of Common Stock issuable
        upon
        conversion thereof except under circumstances which will not result in a
        violation of the 1933 Act or any applicable state Blue Sky or foreign laws
        or
        similar laws relating to the sale of securities.

       

      
        
          
          

        

        
          8

          
            

          

        

        
          
          

        

      

       

      Section
        6.05  Limitations.
        The
        Holder may not convert this Debenture to the extent such conversion would
        result
        in the Holder, together with any affiliate thereof, beneficially owning (as
        determined in accordance with Section 13(d) of the Securities Exchange Act
        of
        1934, as amended, and the rules promulgated thereunder) in excess of 4.999%
        of
        the then issued and outstanding shares of Common Stock held by such Holder
        after
        application of this Section. Since the Holder will not be obligated to report
        to
        the Company the number of shares of Common Stock it may hold at the time
        of a
        conversion hereunder, unless the conversion at issue would result in the
        issuance of shares of Common Stock in excess of 4.999% of the then outstanding
        shares of Common Stock without regard to any other shares which may be
        beneficially owned by the Holder or an affiliate thereof, the Holder shall
        have
        the authority and obligation to determine whether the restriction contained
        in
        this Section will limit any particular conversion hereunder and to the extent
        that the Holder determines that the limitation contained in this Section
        applies, the determination of which portion of the principal amount of Debenture
        are convertible shall be the responsibility and obligation of the Holder.
        If the
        Holder has delivered a Conversion Notice for a principal amount of Debenture
        that would result in the issuance of in excess of the permitted amount
        hereunder, without regard to any other shares that the Holder or its affiliates
        may beneficially own, the Company shall notify the Holder of this fact and
        shall
        honor the conversion for the maximum principal amount permitted to be converted
        on such Conversion Date and, at the option of the Holder, either retain any
        principal amount tendered for conversion in excess of the permitted amount
        hereunder for future conversions or return such excess principal amount to
        the
        Holder. The provisions of this Section may be waived by a Holder (but only
        as to
        itself and not to any other Holder) upon not less than 65 days prior notice
        to
        the Company. Other Holders shall be unaffected by any such waiver.

       

      Section
        6.06  No
        Rights as Shareholder until Conversion. Nothing
        contained in this Debenture shall be construed as conferring upon the Holder
        the
        right to vote or to receive dividends or to consent or receive notice as
        a
        shareholder in respect of any meeting of shareholders or any rights whatsoever
        as a shareholder of the Company, unless and to the extent converted in
        accordance with the terms hereof.

       

      Section
        6.07  Notices.
        Any
        notices required or permitted to be given under the terms of this Agreement
        shall be sent by certified or registered mail (return receipt requested)
        or
        delivered personally or by courier (including a recognized overnight delivery
        service) or by facsimile or by electronic mail either in the text of an email
        message or attached in a commonly readable format, and shall be effective
        five
        days after being placed in the mail, if mailed by regular United States mail,
        or
        upon receipt, if delivered personally, by courier (including a recognized
        overnight delivery service) or by facsimile, or one day after electronically
        mailed if the sender has received no generated notice that the email message
        has
        not been successfully delivered, in each case addressed to a party. The
        addresses for such communications shall be:

       

      If
        to
        Sionix:

      

      2082
        Michelson Drive, Suite 304

      Irvine,
        CA 92612

      Attention:
        _______________

      Facsimile:
        (949)
        752-7998

      Email:

       

      
        
          
          

        

        
          9

          
            

          

        

        
          
          

        

      

       

      with
        a
        copy to:

      

      ____________________

      ____________________

      ____________________

      Attention: 

      Facsimile:
        

      Email:
        

       

      If
        to
        Purchaser:

      

      ____________________

      ____________________

      ____________________

      Attention: 

      Facsimile:
        

      Email:
        

      

      with
        a
        copy to:

      

      Gersten
        Savage LLP

      600
        Lexington Avenue, 9th
        Floor

      New
        York,
        NY 10022

      Attention:
        David E. Danovitch, Esq.

      Facsimile:
        (212) 980-5192

      Email:
        ddanovitch@gerstensavage.com

      

      Each
        party shall provide notice to the other party of any change in
        address.

      

      Section
        6.08  Governing
        Law.
        This
        Debenture shall be governed by and construed in accordance with the laws
        of the
        State of New York. Each of the parties consents to the jurisdiction of the
        federal courts whose districts encompass any part of the City of New York
        or the
        state courts of the State of New York sitting in the City of New York in
        connection with any dispute arising under this Debenture and hereby waives,
        to
        the maximum extent permitted by law, any objection, including any objection
        based on forum
        non coveniens,
        to the
        bringing of any such proceeding in such jurisdictions. Each of the parties
        hereby waives the right to a trial by jury in connection with any dispute
        arising under this Debenture.

       

      Section
        6.09  Severability.
        The
        invalidity of any of the provisions of this Debenture shall not invalidate
        or
        otherwise affect any of the other provisions of this Debenture, which shall
        remain in full force and effect.

       

      Section
        6.10  Entire
        Agreement and Amendments.
        This
        Debenture represents the entire agreement between the parties hereto with
        respect to the subject matter hereof and there are no representations,
        warranties or commitments, except as set forth herein. This Debenture may
        be
        amended only by an instrument in writing executed by the parties
        hereto.

       

      
        
          
          

        

        
          10

          
            

          

        

        
          
          

        

      

       

      Section
        6.11  Counterparts.
        This
        Debenture may be executed in multiple counterparts, each of which shall be
        an
        original, but all of which shall be deemed to constitute on
        instrument.

       

      Section
        6.12  Lost
        Documents.
        Upon
        receipt by the Company of evidence satisfactory to it of the loss, theft,
        destruction or mutilation of this Debenture or any Debenture exchanged for
        it,
        and (in the case of loss, theft or destruction) of indemnity satisfactory
        to it,
        and upon surrender and cancellation of such Debenture, if mutilated, the
        Company
        will make and deliver in lieu of such Debenture a new Debenture of like tenor
        and unpaid principal amount and dated as of the original date of this
        Debenture.

       

      [Remainder
        of page intentionally left blank]

       

      
        
          
          

        

        
          11

          
            

          

        

        
          
          

        

      

       

      IN
        WITNESS WHEREOF,
        with
        the intent to be legally bound hereby, the Company as executed this Debenture
        as
        of the date first written above.

       

      
        
          	 	 	SIONIX:
	 
 	 
 	 
	 	 	By: 
	 	
                  
                    

                  

                  Name:

                
	 	
                  Title:
                    

                

        

      

      

      
        
          
          

        

        
          12

          
            

          

        

        
          
          

        

      

       

      EXHIBIT
        A

       

      NOTICE
        OF CONVERSION

       

      (To
        be executed by the Holder in order to Convert the
        Debenture)

       

      
        	
                TO:

              	 

      

      

      The
        undersigned hereby irrevocably elects to convert $     
        of the
        principal amount of the above Debenture into Shares of Common Stock of Sionix
        Corporation, according to the conditions stated therein, as of the Conversion
        Date written below.

       

      
        	
                Conversion
                  Date:

              	 
	
                Applicable
                  Conversion Price:

              	 
	
                Signature:

              	 
	
                Name:

              	 
	
                Address:

              	 
	
                Amount
                  to be converted:

              	
                $          

              
	
                Amount
                  of Debenture unconverted:

              	
                $          

              
	
                Conversion
                  Price per share: 

              	
                $          

              
	
                Number
                  of shares of Common Stock to be issued:

              	 
	
                Please
                  issue the shares of Common Stock in the following name and to the
                  following address:

              	 
	
                Issue
                  to:

              	 
	
                Authorized
                  Signature:

              	 
	
                Name:

              	 
	
                Title:

              	 
	
                Phone
                  Number:

              	 
	
                Broker
                  DTC Participant Code:

              	 
	
                Account
                  Number:

              	 

      

      

      
        
          
          

        

        
          A-1

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