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EXHIBIT 4.3
 
 STERLING CHEMICALS, INC.
 Trustor
 to
 Stanley Keeton, an Individual
 Trustee
 for the benefit of
 U. S. BANK NATIONAL ASSOCIATION, as Collateral Agent
 Beneficiary
 
 DEED OF TRUST, ASSIGNMENT OF LEASES
AND RENTS,
SECURITY AGREEMENT AND FIXTURE FILING
 Dated March 29, 2007
 This instrument affects certain real and personal property
located in Galveston County,
State of Texas
 Recorded and return to:
 White & Case LLP
1155 Avenue of the Americas
New York, New York 10036
Attention: Leila Rachlin, Esq.
(212) 819-8720
 This instrument was prepared by the above-named attorney.




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DEED OF TRUST, ASSIGNMENT OF LEASES AND RENTS,
SECURITY AGREEMENT AND FIXTURE FILING
    1 4 00 100 1 4
   GRANT




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Real Estate
 Improvements.
 Goods
 2




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Leases
 Plans
 Permits
 Contracts
 Leases of Furniture, Furnishings and Equipment
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Rents
 Proceeds.
     ARTICLE I
 COVENANTS AND AGREEMENTS OF THE TRUSTOR
 Payment of Secured Obligations
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Title to Trust Premises, etc
     Title Insurance
 Title Insurance Policy
 Title Insurance Proceeds
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Recordation
 Payment of Impositions, etc
 Insurance and Legal Requirements
   6




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Security Interests, etc Section 1.8
 Permitted Contests
 7




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Leases
 Compliance with Instruments
 Maintenance and Repair, et
 Alterations, Additions, etc
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Acquired Property Subject to Lien
 Assignment of Rents
  9




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Section 3.11
  No Claims Against the Trustee or the Beneficiary All contractors, subcontractors, vendors and other persons dealing
with the Property, or with any persons interested therein, are hereby advised to take notice of the
provisions of this Section.
 Indemnification
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Sections 1.20 1.21 THE TRUSTEE SHALL NOT BE LIABLE FOR ANY ACT OR OMISSION OR ERROR OF JUDGMENT IN
CONNECTION WITH THIS DEED OF TRUST, IT BEING THE INTENT OF THE PARTIES HERETO THAT THE TRUSTEE
SHALL NOT BE LIABLE FOR THE TRUSTEES SOLE OR CONTRIBUTORY NEGLIGENCE. Section 1.16 Section 1.16
 No Credit for Payment of Taxes
 No Transfer of the Trust Premises
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Security Agreement
 12




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Representations and Warranties
 Trustors Covenants
 Attornment
 Inspections
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ARTICLE II
 INSURANCE; DAMAGE, DESTRUCTION OR TAKING, ETC.
 Insurance
 Risks to be Insured.
 Policy Provisions
 14




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Delivery of Certificates, etc.
 Separate Insurance
 Damage, Destruction or Taking; Trustor to Give Notice;
   15




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ARTICLE III
 EVENTS OF DEFAULT; REMEDIES, ETC.
 Event of Default; Acceleration
 Legal Proceedings; Judicial Foreclosure
 Power of Sale
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Uniform Commercial Code Remedies
 Beneficiary Authorized to Execute Deeds, etc
 Purchase of Trust Premises by Beneficiary
 18




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Receipt a Sufficient Discharge to Purchaser
 Waiver of Appraisement Valuation, etc
 Sale a Bar Against Trusto
 Secured Obligations to Become Due on Sale
 Application of Proceeds of Sale and Other Moneys
 Appointment of Receiver
 Possession, Management and Income
 19




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Right of Beneficiary to Perform Trustors Covenants, etc
 Subrogation
 Remedies, etc., Cumulative
 Provisions Subject to Applicable Law
 20




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No Waiver, etc
 Compromise of Actions, etc
 ARTICLE IV
 DEFINITIONS
         21




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Section 5.16
  Section 1.5.
  Section 1.16
   Section
1.6
    Section 1.6
  22




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Section 1.2
                Use of Defined Terms
 23




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Indenture Definitions
 ARTICLE V
 MISCELLANEOUS
 Further Assurances; Financing Statements
 Further Assurances
      Financing Statements
 Additional Security
 24




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Defeasance; Partial Release etc
 Defeasance
 Partial Release, etc
 Notices, etc.
 Waivers, Amendments, etc
 Cross-References
 Heading
 Currency
 Governing Law
 25




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Successors and Assigns, etc
 Concerning the Trustee
 Acceptance of Trusts; Certain Terms of the Trusts
        26




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Duties and Responsibility of Trustee; In Case of Default; Prior to Default;
When Acting Under Direction of Beneficiary
         Resignation and Removal; Appointment of Successor Trustee
  27




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Waiver of Jury Trial; Submission to Jurisdiction
  28




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Severability; Conflicts
 Security Agreement
 Usury Savings Clause
  29




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Entire Agreement
 No Partnership
  Future Advances
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[SIGNATURE PAGE FOLLOWS]
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STERLING CHEMICALS, INC.,
a Delaware corporationBy:Title:
    Name: [NOTARY PAGE FOLLOWS]
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TRUSTOR
 
 
 
 
  
   Notary 33




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EXHIBIT A
 Part I
 Property Description




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(A)
    
    North-south alley bordered on the West by Block 12, on the South and East by Monsanto plant
property lines, and on the North by the right-of-way of Second Avenue;
 (B)
    
    First Street bordered on the West by Block 13, on the South by Monsanto Plant property line,
on the East by Block 12, and on the North by the right-of-way of Second Avenue South;
 (C)
    
    Second Street bordered on the West by Block 36, on the South by Monsanto Plant property line,
on the East by Block 13, on the North by the right-of-way of Second Avenue South;
 (D)
    
    East-west alley bordered on the South by Block 37, on the East by Monsanto plant property
line, on the North by Block 36, and on the West by the right-of-way of Third Street;
 (E)
    
    Bay Street bordered on the West by Block 12, on the South by the Easterly extension or
prolongation of the South boundary line of Block 12, on the East by Monsanto Plant property
line, and on the North by the South right-of-way of Second Avenue South.
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EXHIBIT A
 Part II
 Property Description
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EXHIBIT A
 Part III
 Property Description
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Miscellaneous:
 Line No. 17
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