MATERIAL SAFETY DATA SHEET 01530                                   Pg. 1

Issued: 11/19/07

1.     Chemical Product and Contact Information

                                        Cystine

     Product Name:                                                        Part Number:

                                                                            502-207

     LECO Corporation

     3000 Lakeview

     St. Joseph, Michigan 49085

     Information:      269-983-5531

     Chemtrec:         800-424-9300

     (Chemtrec Int'l: 703-527-3887)



2.     Composition/Information on Ingredients

                                   OSHA         ACGIH                                Typical %

Component            CAS No.       PEL (mg/m 3) TLV (mg/m3)                          by Weight

Cystine              56-89-3       Not given    Not given                              > 99



3.     Hazard Identification

                                    EMERGENCY OVERVIEW

No unusual fire hazard; minor spill hazard. Moderate health hazard. Odorless white powder.





Potential Health Effects

     EYES: Not available.

     SKIN: Irritation.

     INHALATION: Irritation.

     INGESTION: Irritation.

     MEDICAL CONDITIONS AGGRAVATED: Not available.

     CHRONIC OVEREXPOSURE: Not available.

     ACUTE OVEREXPOSURE: Not available.

     CARCINOGENICITY: Not available.









                                                                                P/N: 502-207

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4.      First Aid Measures

     EYES: Flush with copious amounts of water for at least 15 minutes; assure adequate flushing by

        separating the eyelids with fingers. Call a physician.

     SKIN: Flush with copious amounts of water for at least 15 minutes. Remove contaminated clothing

        and shoes. Call a physician.

     INHALATION: Remove to fresh air. If breathing becomes difficult, call a physician.

     INGESTION: Wash out mouth with water provided person is conscious. Call a physician.



5.      Fire Fighting Measures

     FLAMMABLE PROPERTIES: Non-flammable.

        Flash Point: Not available.            Method Used: Not available.

        Flammable Limits (% by Volume in Air):

               Lower: Not available.           Upper: Not available.

     AUTO-IGNITION TEMPERATURE: Not available.

     HAZARDOUS COMBUSTION PRODUCTS: Not available.

     EXTINGUISHING MEDIA: Water spray, carbon dioxide, dry chemical powder or appropriate

        foam.

     FIREFIGHTING INSTRUCTIONS: Wear self-contained breathing apparatus and protective

        clothing to protect contact with skin and eyes.



6.      Accidental Release Measures

     SMALL/LARGE SPILL: Wear protective equipment. Sweep up, place in a bag and hold for waste

       disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is

       complete.



7.      Handling and Storage

     HANDLING: Refer to Section 8.

     STORAGE: Store in a cool, dry place. Keep container closed.



8.      Exposure Controls/Personal Protection

     ENGINEERING CONTROLS: Use mechanical exhaust.

     RESPIRATORY PROTECTION: Use appropriate NIOSH/MSHA approved respirator..

     SKIN AND HAND PROTECTION: Chemical-resistant gloves.

     EYE AND FACE PROTECTION: Safety goggles.

     OTHER PROTECTIVE EQUIPMENT: Protective clothing.









                                                                                P/N: 502-207

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9.       Physical and Chemical Properties

      APPEARANCE: White powder.

      BOILING POINT: Not available.

      FREEZE-MELT POINT: > 464° F. (240° C.)

      VAPOR PRESSURE (mm): Not available.

      VAPOR DENSITY (air = 1): Not available.

      SOLUBILITY IN WATER: Not available.

      SPECIFIC GRAVITY: Not available.

      pH: Not available.

      ODOR: None.

      PERCENT VOLATILES: Not available.

      EVAPORATION RATE (Butyl Acetate = 1): Not available.



10.      Stability and Reactivity

      CHEMICAL STABILITY (CONDITIONS TO AVOID): Stable.

      INCOMPATIBILITY: Not available.

      HAZARDOUS DECOMPOSITION PRODUCTS: Toxic fumes, carbon monoxide, carbon dioxide,

         nitrogen oxides, sulfur oxides.

      HAZARDOUS POLYMERIZATION: None.



11.      Toxicological Information

      Not available.



12.      Ecological Information

      Not available.



13.      Disposal Consideration

      Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped

         with an afterburner and scrubber. Observe all federal, state and local environmental regulations.



14.      Transportation Information

      U.S.A. DOT: Not regulated.









                                                                                     P/N: 502-207

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15.      Regulatory Information



U.S. FEDERAL REGULATIONS:

   TSCA STATUS:            On Toxic Substance Control Inventory.

   CERCLA REPORTABLE QUANTITY: None.

   SARA TITLE III:

      Section 302 Extremely Hazardous Substances:             None.

      Section 313 Toxic Chemicals:                            None.

   RCRA STATUS:            Not regulated.



CANADIAN REGULATIONS:

  WHMIS: Not regulated.



16.      Other Information

      Prepared By:



                     Jason Whitt



Information herein is given in good faith as authoritative and valid; however, no warranty, expressed

or implied can be made.









                                                                                 P/N: 502-207