| 1. | Definitions.      Capitalized terms used but not otherwise defined herein have the      respective meanings given to such terms in the LLC    Agreement. |
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| 2. | Restrictions on      Transfer of Acquired Shares. |
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|   | (a) | Without      the prior written consent of Quigley, prior to June 1, 2012, PSI      Parent shall not, directly or indirectly, Transfer the Acquired Shares, in      whole or in part; provided, however, that,      subject to Section 2(b),      PSI Parent may Transfer any or all of the Acquired Shares in connection      with, and contemporaneously upon the consummation of, a Company      Sale. |
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|   | (b) | PSI      Parent shall not Transfer any of the Acquired Shares in contravention of      applicable law. |
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|   | (c) | “Company Sale”      means any arm’s-length transaction in which (i) Quigley sells all or      substantially all of its assets to a Third Party, (ii) a Third Party      purchases outstanding Common Stock such that, upon the consummation      thereof, such Third Party will own more than 50% of the shares of capital      stock of Quigley entitled to vote generally in the election of Quigley’s      directors, or (iii) a Third Party merges with Quigley such that,      immediately upon consummation of such merger, the equityholders of such      Third Party will own, in the aggregate, more than 50% of the shares of      capital stock of Quigley entitled to vote generally in the election of      Quigley’s directors. |
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|   | (d) | “Third Party”      means any Person that is not an Affiliate of Quigley immediately prior to      the consummation of a transaction of the type described in Section 2(c). |
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|   | (e) | Any      purported Transfer in contravention of this Section 2      will be null and void ab      initio. |
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| 3. | PSI Parent      Representations andAcknowledgments. |
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|   | (a) | In      order to induce Quigley to issue the Acquired Shares to PSI Parent, PSI      Parent represents and warrants to Quigleythat: |
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|   | (i) | PSI      Parent has such knowledge and experience in financial and business matters      as to be capable of evaluating the merits and risks of its investment in      the Acquired Shares; |
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|   | (ii) | no      broker has acted on behalf of PSI Parent in connection with this Agreement      or the License Agreement, and there are no brokerage commissions, finders’      fees or commissions payable in connection herewith or therewith based on      any agreement, arrangement or understanding with PSI Parent or any action      taken by PSI Parent; |
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|   | (iii) | PSI      Parent is acquiring the Acquired Shares for investment purposes only, for      its own account and not with a view to, or for resale in connection with,      any distribution thereof within the meaning of the Securities Act of 1933,      as amended (the “Securities      Act”); |
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|   | (iv) | the      offer of the Acquired Shares to PSI Parent was not made by any public or      general means or pursuant to any public or general      solicitation; |
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|   | (v) | PSI      Parent is an “accredited investor” within the meaning of Rule 501 of      Regulation D under the SecuritiesAct; |
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|   | (vi) | PSI      Parent is not purchasing the Acquired Shares for the account or on behalf      of any U.S. Person (which, for the purposes of this Agreement, shall have      the definition ascribed thereto in Regulation S promulgated under the      Securities Act (“Regulation      S”)); |
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|   | (vii) | PSI      Parent is not a U.S. Person, was not formed under the laws of any United      States jurisdiction and was not formed for the purpose of investing in      securities not registered under the Securities  Act; |
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|   | (viii) | PSI      Parent has not made any pre-arrangement to transfer any of the Acquired      Shares to a U.S. Person or to return any of the Acquired Shares to the      United States securities markets (which includes short sales and hedging      transactions in the United States within the periods restricted under      Regulation S (the “Restricted      Periods”) to be covered by delivery of any of the Acquired Shares)      and is not acquiring the Acquired Shares as part of any plan or scheme to      evade the registration requirements of the Securities  Act; |
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|   | (ix) | PSI      Parent acknowledges and understands that (A) all offers and sales of any      of the Acquired Shares by PSI Parent in the United States or to U.S.      Persons or otherwise, whether prior to the expiration or after the      expiration of the Restricted Periods, shall be made only pursuant to a      registration of such Acquired Shares under the Securities Act or an      exemption from registration requirements of the Securities Act and (B)      Quigley will, in order to approve removal of the restrictive legend from      certificates evidencing the Acquired Shares, require from PSI Parent      (i) certain written representations to indicate that the sale of the      Acquired Shares was made in a transaction that complies with the      provisions of Regulation S, pursuant to a registration of the Acquired      Shares under the Securities Act or pursuant to an exemption from the      registration requirements of the Securities Act and (ii) require a      legal opinion that removal of the legend is  appropriate; |
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|   | (x) | PSI      Parent has not engaged in any “directed selling efforts” (as defined in      Regulation S) in the United States regarding any of the Acquired Shares,      nor has it engaged in any act intended to or that reasonably might have      the effect of preconditioning the U.S. market for the resale of any of the      Acquired Shares; |
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|   | (xi) | PSI      Parent is not a “distributor” as defined in Regulation S and is not an      officer, director or “affiliate” (as that term is defined in Rule 405      under the Securities Act) of Quigley or an “underwriter” or “dealer” (as      such terms are defined in the federal securities laws of the United      States); and |
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|   | (xii) | PSI      Parent does not have a short position in, or other hedged position with      respect to, the Acquired Shares or any other shares of the Common Stock      and will not have a short position in, or other hedged position with      respect to, such securities at any time prior to the expiration of the      Restricted Periods. |
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|   | (b) | PSI      Parent acknowledges: |
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|   | (i) | that      the Acquired Shares have not been registered under (and that Quigley has      no present intention to register the Acquired Shares under) the Securities      Act or applicable state securities law and that the offering and sale of      the Acquired Shares have been made in reliance on the exemption from the      registration requirements provided by Section 4(2) of the Securities      Act and the regulations promulgated thereby and analogous provisions of      certain state securities laws or in accordance with Regulation S      under the Securities Act; |
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|   | (ii) | that      the Acquired Shares may not be sold or otherwise transferred unless, among      other things, the Acquired Shares have been registered under the      Securities Act and applicable state securities laws or are sold or      transferred in a transaction exempt therefrom;  and |
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|   | (iii) | that      it may have to bear the economic risk associated with its ownership of the      Acquired Shares for an indefinite period of time or to suffer a complete      loss of its investment; |
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|   | (iv) | that:      (A) it has received and reviewed this Agreement; (B) it, its      attorney and its accountant have had access to, and an opportunity to      review, all documents and other materials requested of Quigley; and      (C) it and they have been given an opportunity to ask any and all      questions of, and receive answers from, Quigley concerning the terms and      conditions of the offering and issuance of Acquired Shares and to obtain      all information that it or they believe necessary or appropriate to invest      in Quigley and to purchase the Acquired Shares, to verify the accuracy of      documents and materials requested of Quigley and to evaluate the      suitability of an investment in the Acquired Shares;  and |
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|   | (v) | that,      in evaluating the suitability of an investment in the Acquired Shares, it      has not relied upon any representations, warranties or other information      (whether oral or written), other than such information as has been made      publicly available in Quigley’s periodic reports, as filed with the United      States Securities and Exchange Commission (such information, “Public      Information”). |
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|   | (c) | PSI      Parent hereby waives, to the maximum extent permitted by law, any claim,      or potential claim, it has or may have against Quigley and its officers,      directors, shareholders, partners, successors and assigns, relating to any      such person’s possession of information that is not Public      Information. |
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| 4. | Legends on Share      Certificates. PSI Parent hereby consents to the placement of the      following legends on the stock certificate or certificates representing      the Acquired Shares: |
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| 5. | Restrictions on      Acquisition of AdditionalShares. |
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|   | (a) | Without      the prior written consent of Quigley, PSI Parent shall not, and shall not      cause any of its Subsidiaries to, directly or indirectly: (i) acquire      any (A) Additional Shares, (B) Common Stock Equivalents, and/or      (C) beneficial or other interest (whether with respect to voting      rights, economic rights, or otherwise) in any Additional Shares or in any      Common Stock Equivalents; and/or (ii) enter into any Contract with      respect to any of the actions described in the immediately foregoing      clause (i). |
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|   | (b) | “Additional      Shares” means any shares of Common Stock other than the Acquired      Shares. |
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|   | (c) | “Common Stock      Equivalents” means (i) any warrant, option, subscription or      purchase right with respect to one or more shares of Common Stock,      (ii) any Security convertible into, exchangeable for or otherwise      entitling the holder thereof to acquire one or more shares of Common      Stock, or (iii) any warrant, option, subscription or purchase right      with respect to any Security described in the immediately foregoing      clause (ii). |
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| 6. | Piggyback      Rights. |
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|   | (a) | If,      at any time after June 1, 2012, Quigley proposes to register any      Common Stock (such Common Stock, “Offered      Securities”) under the Securities Act in connection with an      underwritten public offering by Quigley of such Offered Securities solely      for cash and on any form that would permit the registration of the      Acquired Shares (other than a registration (i) relating solely to the      sale of securities to participants in a stock grant, option or purchase      plan or other employee stock incentive program or agreement, (ii) on      any form that does not include substantially the same information as would      be required to be included in a registration statement covering the sale      of Acquired Shares, (iii) in which such Offered Securities constitute      all or part of the consideration in connection with a Company Sale (or      analogous transaction with respect to any Subsidiary of Quigley) or      (iv) in which such Offered Securities are being registered in      connection with a private investment in Quigley’s securities or a      transaction commonly referred to as a “PIPE” transaction), then, on or      before the date that is 20 days prior to the filing of a registration      statement in connection with such registration (any such registration, a      “Registration”),      Quigley shall give written notice (such notice, a “Registration      Notice”) of such proposed Registration to PSI Parent, specifying in      such Registration Notice the number of Offered Securities that Quigley      intends to register. |
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|   | (b) | PSI      Parent may elect to participate (subject to the terms of this Section 6)      in such Registration, with respect to the Acquired Shares, by giving      written notice to Quigley (such notice, a “Registration      Participation Notice”) on or before the date that is 15 days after      Quigley gives a Registration Notice, specifying in such Registration      Participation Notice the number of Acquired Shares that it elects to      include in such Registration (such Acquired Shares, as specified in such      Registration Participation Notice and as may thereafter be reduced in      number pursuant to Section 6(d),      the “Registration Requested      Acquired Shares”). |
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|   | (c) | If      PSI Parent elects to participate in a given Registration in accordance      with this Section 6,      then (i) PSI Parent shall enter into an underwriting agreement in      usual and customary form with the underwriter or underwriters selected by      Quigley for such underwriting (including, if applicable, provisions      relating to a lock-up period after such Registration is effected with      respect to the sale of Registration Requested Acquired Shares) and      (ii) PSI Parent shall complete and execute all questionnaires, powers      of attorney, indemnities and other documents, each in customary form,      reasonably required under the terms of such underwriting agreement; provided, however, that      (x) PSI Parent will not be required to make any representations or      warranties in connection with any such underwriting agreement other than      customary representations and warranties with respect to itself and the      Registration Requested Acquired Shares, and (y) any obligation of PSI      Parent to indemnify any Person pursuant to any such underwriting agreement      will be limited to the net amount received by PSI Parent from the sale of      its Registration Requested Acquired Shares pursuant to such      Registration. |
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|   | (d) | Notwithstanding      anything in this Section 6      to the contrary, if the managing underwriter for such Registration (such      underwriter, the “Managing      Underwriter”) advises Quigley that marketing factors require a      limitation of the number of securities to be underwritten in such      Registration, then Quigley shall give written notice thereof to PSI Parent      and the number of Registration Requested Acquired Shares that PSI Parent      will be entitled to include in such Registration and the number of other      securities (such other securities, collectively with the Registration      Requested Acquired Shares, “Participating      Securities”) offered for the account of other Persons (such other      Persons, collectively with PSI Parent, “Participating      Stockholders”) will be collectively reduced on a pro rata basis      based upon the number of securities that each Participating Stockholder      has elected to include in such Registration, such that the aggregate      number of Participating Securities included in such Registration can be      sold (in the opinion of the Managing Underwriter) in light of such      marketing factors. |
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|   | (e) | Notwithstanding      anything in this Section 6      to the contrary, Quigley may elect to abandon any given Registration,      whether or not PSI Parent has elected to participate in such Registration,      by providing written notice to PSI Parent that it would be detrimental to      Quigley or its stockholders to proceed with such    Registration. |
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|   | (f) | The      rights afforded to PSI Parent pursuant to this Section 6 will      extend to any Person that acquires Acquired Shares in accordance with this      Agreement and applicable law. |
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|   | (g) | Notwithstanding      anything in this Section 6 to      the contrary, the rights afforded pursuant to this Section 6 will      not apply with respect to Acquired Shares that have been registered and      sold pursuant to the Securities Act, that have been sold pursuant to Rule      144 under the Securities Act (or any similar rules promulgated pursuant to      the Securities Act), or that are eligible for sale pursuant to Rule 144(k)      under the Securities Act. |
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| 7. | Miscellaneous. |
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|   | (a) | Amendments. Any      provision of this Agreement may be amended if, and only if, such amendment      is in writing and is signed by eachParty. |
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|   | (b) | Incorporation of      Provisions in LLC Agreement. The following provisions of the LLC      Agreement are hereby incorporated by reference as if set forth herein in      full, mutatis      mutandis: Sections 1.2 (Construction);       20.1 (Notices); 20.5 (Waivers); 20.6 (Successors and      Assigns); 20.7 (Governing Law); 20.8 (Dispute Resolution and      Arbitration); 20.9 (Counterparts); 20.11 (No Third-Party      Beneficiaries); 20.13 (Captions); 20.14 (Severability);      20.15 (Interpretation); 20.16 (Consent to Jurisdiction and      Venue); 20.17 (Specific Performance); 20.18 (Further      Assurances); 20.19 (Signed Writings); and 20.21 (Access to      Counsel). |
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| THE      QUIGLEY CORPORATION |
|------------------------------|
|                         |   |
| By:                     | /s/ Ted Karkus |
|                         | Name:      Ted Karkus |
|                         | Title:      Chief Executive Officer |
|                         |   |
| PHOSPHAGENICS      LTD.      |
|                         |   |
| By:                     | /s/ Fred Banti |
|                         | Name:      Fred Banti |
|                         | Title:      Senior Vice President and Chief BusinessOfficer |

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