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Section I.Chemical Product and Company Identification
    Chemical Name        2-Phosphonobutane-1,2,4-tricarboxylic Acid    
    (ca. 50% in Water)
    Portland OR
    Synonym        1,2,4-Butanetricarboxylic acid, 2-phosphono- (CA    
    INDEX NAME); 3-Carboxy-3-phosphonohexanedioic
    Acid
    Chemical Formula        C7H11O9P    
    CAS Number        37971-36-1    
    7732-18-5 (water)

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Section II.        Composition and Information on Ingredients    
    Toxicology Data
    Chemical Name        CAS Number Percent (%)        TLV/PEL    
    Not available.        Not available.    
    2-Phosphonobutane-1,2,4-tricarboxylic Acid        37971-36-1        ca. 50%    
    (ca. 50% in Water)
    7732-18-5        ca. 50%    
    (water)        (water)    

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Section III. Hazards Identification
    Corrosive to skin, eyes, and respiratory system. Liquid or spray mist may produce tissue damage, particularly in mucous
    Acute Health Effects
    membranes of the eyes, mouth and respiratory tract. Skin contact may produce burns. Eye contact can result in corneal
    damage or blindness. Inhalation of the spray mist may produce severe irritation of respiratory tract, characterized by
    coughing, choking, or shortness of breath. Corrosive materials may cause serious injury if ingested.
    Follow safe industrial hygiene practices and always wear proper protective equipment when handling this compound.
    CARCINOGENIC EFFECTS : Not available.
    Chronic Health Effects
    MUTAGENIC EFFECTS : Not available.
    TERATOGENIC EFFECTS : Not available.
    DEVELOPMENTAL TOXICITY: Not available.
    Repeated or prolonged contact with spray mist may produce chronic eye irritation and severe skin irritation. Repeated or
    prolonged exposure to spray mist may produce respiratory tract irritation leading to frequent attacks of bronchial infection.

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Section IV.        First Aid Measures    
    Eye Contact        Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15    
    minutes. Get medical attention.
    Skin Contact        In case of contact, immediately flush skin with plenty of water. Remove contaminated clothing and shoes. Wash clothing    
    before reuse. Thoroughly clean shoes before reuse. Get medical attention.
    Inhalation        If the victim is not breathing, perform mouth-to-mouth resuscitation. Loosen tight clothing such as a collar, tie, belt or    
    waistband. If breathing is difficult, oxygen can be administered. Seek medical attention if respiration problems do not
    improve.
    DO NOT INDUCE VOMITING. Loosen tight clothing such as a collar, tie, belt or waistband. If the victim is not breathing,
    Ingestion
    perform mouth-to-mouth resuscitation. Examine the lips and mouth to ascertain whether the tissues are damaged, a possible
    indication that the toxic material was ingested; the absence of such signs, however, is not conclusive.

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Section V.        Fire and Explosion Data    
    Not available.
    Flammability        May be combustible at high temperature.        Auto-Ignition    
    Flash Points        Not available.        Flammable Limits        Not available.    
    Combustion Products        These products are toxic carbon oxides (CO, CO2), phosphates.    
    Fire Hazards
    Not available.
    Explosion Hazards        Risks of explosion of the product in presence of mechanical impact: Not available.    
    Risks of explosion of the product in presence of static discharge: Not available.
    Fire Fighting Media        SMALL FIRE: Use DRY chemical powder.    
    LARGE FIRE: Use water spray, fog or foam. DO NOT use water jet.
    and Instructions
    Consult with local fire authorities before attempting large scale fire-fighting operations.
    Continued on Next Page
    2-Phosphonobutane-1,2,4-tricarboxylic Acid
    (ca. 50% in Water)

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Section VI.        Accidental Release Measures    
    Spill Cleanup        Corrosive material.    
    Stop leak if without risk. Absorb with DRY earth, sand or other non-combustible material. DO NOT get water inside
    Instructions
    container. DO NOT touch spilled material. Use water spray curtain to divert vapor drift. Prevent entry into sewers,
    basements or confined areas; dike if needed. Eliminate all sources of ignition. Consult federal, state, and/or local authorities
    for assistance on disposal.

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Section VII. Handling and Storage
    CORROSIVE. Keep container dry. Keep away from heat. Mechanical exhaust required. When not in use, tightly seal the
    Handling and Storage
    container and store in a dry, cool place. Avoid excessive heat and light. Do not breathe gas/fumes/ vapor/spray. Never add
    Information
    water to this product. Wear suitable protective clothing. If you feel unwell, seek medical attention and show the label when
    possible. Treat symptomatically and supportively.
    Always store away from incompatible compounds such as oxidizing agents, metals.

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Section VIII. Exposure Controls/Personal Protection
    Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors below their respective
    Engineering Controls
    threshold limit value. Ensure that eyewash station and safety shower is proximal to the work-station location.
    Face shield. Lab coat. Vapor respirator. Boots. Gloves. Suggested protective clothing might not be sufficient; consult a
    Personal Protection
    specialist BEFORE handling this product. Be sure to use a MSHA/NIOSH approved respirator or equivalent.
    Exposure Limits        Not available.    

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Section IX. Physical and Chemical Properties
    Liquid. (Clear, colorless ~ light yellow.)        Solubility    
    Physical state @ 20°C        Miscible with water.    
    Not available.
    Specific Gravity
    270.13
    Molecular Weight        Partition Coefficient        Not available.    
    Boiling Point        Not available.        Vapor Pressure        114 hPa (@ 50°C)    
    -15°C (5°F)        Not available.    
    Melting Point        Vapor Density    
    Not available.        Volatility        Not available.    
    Refractive Index
    Not available.
    Critical Temperature        Not available.        Odor    
    Viscosity        Not available.        Taste        Not available.    

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Section X.        Stability and Reactivity Data    
    Stability    

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This material is stable if stored under proper conditions. (See Section VII for instructions)    
    Conditions of Instability        Avoid excessive heat and light.    
    Incompatibilities
    Reactive with oxidizing agents, metals.

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Section XI. Toxicological Information
    Not available.
    RTECS Number
    Routes of Exposure        Eye Contact. Ingestion. Inhalation. Skin contact.    
    Not available.
    Toxicity Data
    Chronic Toxic Effects        CARCINOGENIC EFFECTS : Not available.    
    MUTAGENIC EFFECTS : Not available.
    TERATOGENIC EFFECTS : Not available.
    DEVELOPMENTAL TOXICITY: Not available.
    Repeated or prolonged contact with spray mist may produce chronic eye irritation and severe skin irritation. Repeated or
    prolonged exposure to spray mist may produce respiratory tract irritation leading to frequent attacks of bronchial infection.
    Acute Toxic Effects        Corrosive to skin, eyes, and respiratory system. Liquid or spray mist may produce tissue damage, particularly in mucous    
    membranes of the eyes, mouth and respiratory tract. Skin contact may produce burns. Eye contact can result in corneal
    damage or blindness. Inhalation of the spray mist may produce severe irritation of respiratory tract, characterized by
    coughing, choking, or shortness of breath. Corrosive materials may cause serious injury if ingested.
    Follow safe industrial hygiene practices and always wear proper protective equipment when handling this compound.
    Continued on Next Page
    2-Phosphonobutane-1,2,4-tricarboxylic Acid
    (ca. 50% in Water)

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Section XII.        Ecological Information    
    Not available.
    Ecotoxicity
    Environmental Fate        Not available.    

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Section XIII. Disposal Considerations
    Recycle to process, if possible. Consult your local regional authorities. You may be able to dissolve or mix material with a
    Waste Disposal
    combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber system. Observe all
    federal, state and local regulations when disposing of the substance.

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Section XIV. Transport Information
    DOT Classification        DOT Class 8: Corrosive material    
    PIN Number
    Proper Shipping Name        Corrosive liquid, acidic, organic, n.o.s.    
    Packing Group (PG)        III    
    DOT Pictograms

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Section XV. Other Regulatory Information and Pictograms
    TSCA Chemical Inventory        This compound is ON the EPA Toxic Substances Control Act (TSCA) inventory list.    
    (EPA)
    WHMIS Classification        CLASS E: Corrosive liquid.    
    On DSL.
    (Canada)
    EINECS Number (EEC) 253-733-5
    EEC Risk Statements        R34- Causes burns.    

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SECTION 16 - ADDITIONAL INFORMATION
N/A