PRODUCT #: 30199        NAME: L-CYSTINE*

                      MATERIAL SAFETY DATA SHEET, Valid 11/97 - 1/98

                          Printed Tuesday, March 11, 1903 2:10PM



Sigma Chemical Co.          Aldrich Chemical Co., Inc.    Fluka Chemical Corp.

P.O. Box 14508              1001 West St. Paul            1001 West St. Paul

St. Louis, MO 63178         Milwaukee, WI 53233           Milwaukee, WI 53233

Phone: 314-771-5765         Phone: 414-273-3850           Phone: 414-273-3850









SECTION 1. - - - - - - - - - CHEMICAL IDENTIFICATION- - - - - - - - - -

    CATALOG #:            30199

    NAME:                 L-CYSTINE*

SECTION 2. - - - - - COMPOSITION/INFORMATION ON INGREDIENTS - - - - - -

    CAS #:     56-89-3

    MF: C6H12N2O4S2

    EC NO: 200-296-3

  SYNONYMS

    CYSTEINE DISULFIDE * CYSTIN * CYSTINE (L)- * (-)-CYSTINE * L-CYSTINE

    (9CI) * CYSTINE ACID * DICYSTEINE * BETA,BETA'-DITHIODIALANINE *

    OXIDIZED L-CYSTEINE *

SECTION 3. - - - - - - - - - - HAZARDS IDENTIFICATION - - - - - - - - -

    DATA NOT AVAILABLE

SECTION 4. - - - - - - - - - - FIRST-AID MEASURES- - - - - - - - - - -

    IF SWALLOWED, WASH OUT MOUTH WITH WATER PROVIDED PERSON IS CONSCIOUS.

    CALL A PHYSICIAN.

    IN CASE OF SKIN CONTACT, FLUSH WITH COPIOUS AMOUNTS OF WATER

    FOR AT LEAST 15 MINUTES. REMOVE CONTAMINATED CLOTHING AND

    SHOES. CALL A PHYSICIAN.

    IF INHALED, REMOVE TO FRESH AIR. IF BREATHING BECOMES DIFFICULT,

    CALL A PHYSICIAN.

    IN CASE OF CONTACT WITH EYES, FLUSH WITH COPIOUS AMOUNTS OF WATER

    FOR AT LEAST 15 MINUTES. ASSURE ADEQUATE FLUSHING BY SEPARATING

    THE EYELIDS WITH FINGERS. CALL A PHYSICIAN.

SECTION 5. - - - - - - - - - FIRE FIGHTING MEASURES - - - - - - - - - -

  EXTINGUISHING MEDIA

    WATER SPRAY.

    CARBON DIOXIDE, DRY CHEMICAL POWDER OR APPROPRIATE FOAM.

  SPECIAL FIREFIGHTING PROCEDURES

    WEAR SELF-CONTAINED BREATHING APPARATUS AND PROTECTIVE CLOTHING TO

    PREVENT CONTACT WITH SKIN AND EYES.

SECTION 6. - - - - - - - - ACCIDENTAL RELEASE MEASURES- - - - - - - - -

    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.

SECTION 7. - - - - - - - - - - HANDLING AND STORAGE- - - - - - - - - - -

    REFER TO SECTION 8.

SECTION 8. - - - - - - EXPOSURE CONTROLS/PERSONAL PROTECTION- - - - - -

    WEAR APPROPRIATE NIOSH/MSHA-APPROVED RESPIRATOR, CHEMICAL-RESISTANT

    GLOVES, SAFETY GOGGLES, OTHER PROTECTIVE CLOTHING.

    MECHANICAL EXHAUST.

    STORE IN A COOL DRY PLACE.

SECTION 9. - - - - - - - PHYSICAL AND CHEMICAL PROPERTIES - - - - - - -

  APPEARANCE AND ODOR

    WHITE POWDER

SECTION 10. - - - - - - - - -STABILITY AND REACTIVITY - - - - - - - - -

  STABILITY

    STABLE.



                                           Page 1

                        PRODUCT #: 30199        NAME: L-CYSTINE*

                     MATERIAL SAFETY DATA SHEET, Valid 11/97 - 1/98

                         Printed Tuesday, March 11, 1903 2:10PM



  HAZARDOUS COMBUSTION OR DECOMPOSITION PRODUCTS

    TOXIC FUMES OF:

    CARBON MONOXIDE, CARBON DIOXIDE

    NITROGEN OXIDES

    SULFUR OXIDES

  HAZARDOUS POLYMERIZATION

    WILL NOT OCCUR.

SECTION 11. - - - - - - - - - TOXICOLOGICAL INFORMATION - - - - - - - -

  ACUTE EFFECTS

    MAY BE HARMFUL BY INHALATION, INGESTION, OR SKIN ABSORPTION.

    MAY CAUSE IRRITATION.

    THE TOXICOLOGICAL PROPERTIES HAVE NOT BEEN THOROUGHLY

    INVESTIGATED.

  RTECS #: HA2690000

    CYSTINE, L-

    ONLY SELECTED REGISTRY OF TOXIC EFFECTS OF CHEMICAL SUBSTANCES

    (RTECS) DATA IS PRESENTED HERE. SEE ACTUAL ENTRY IN RTECS FOR

    COMPLETE INFORMATION.

SECTION 12. - - - - - - - - - ECOLOGICAL INFORMATION - - - - - - - - - -

    DATA NOT YET AVAILABLE.

SECTION 13. - - - - - - - - - DISPOSAL CONSIDERATIONS - - - - - - - - -

    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.

SECTION 14. - - - - - - - - - - TRANSPORT INFORMATION - - - - - - - - -

    CONTACT FLUKA CHEMICAL COMPANY FOR TRANSPORTATION INFORMATION.

SECTION 15. - - - - - - - - - REGULATORY INFORMATION - - - - - - - - - -

  REVIEWS, STANDARDS, AND REGULATIONS

    OEL=MAK

    NOHS 1974: HZD 83262; NIS 2; TNF 138; NOS 9; TNE 6186

    NOES 1983: HZD 83262; NIS 5; TNF 692; NOS 17; TNE 15248; TFE 13345

    EPA TSCA SECTION 8(B) CHEMICAL INVENTORY

SECTION 16. - - - - - - - - - - OTHER INFORMATION- - - - - - - - - - - -

    THE ABOVE INFORMATION IS BELIEVED TO BE CORRECT BUT DOES NOT PURPORT TO

    BE ALL INCLUSIVE AND SHALL BE USED ONLY AS A GUIDE. SIGMA, ALDRICH,

    FLUKA SHALL NOT BE HELD LIABLE FOR ANY DAMAGE RESULTING FROM HANDLING

    OR FROM CONTACT WITH THE ABOVE PRODUCT. SEE REVERSE SIDE OF INVOICE OR

    PACKING SLIP FOR ADDITIONAL TERMS AND CONDITIONS OF SALE.

    COPYRIGHT 1997 SIGMA CHEMICAL CO., ALDRICH CHEMICAL CO., INC.,

    FLUKA CHEMIE AG

    LICENSE GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY









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