Product ID:L-CYSTEINE FREE BASE CRYSTALLINE, C7755
MSDS Date:05/18/1988
FSC:6810
NIIN:00N062548
MSDS Number: BYFWH

Emergency Phone: 314-771-5765

Info Phone: 800-325-8070

Cage: 0DK69

Telephone: 314-771-5765

Cage: 0DK69

CYSTEINE, L-; (L-CYSTEINE FREE BASE CRYSTALLINE)

CAS: 52-90-4

RTECS: HA1600000

OSHA PEL N/K

ACGIH TLV: N/K

LD50 LC50 Mixture:LD50(ORAL,RAT):5580 MG/KG
Routes of Entry: Inhalation:YES Skin:YES Ingestion:YES
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:ACUTE:CAUSES IRRITATION. MATERIAL IS
IRRITATING TO MUCOUS MEMBRANES AND UPPER RESPIRATORY TRACT.
IRRITATING TO EYES AND SKIN. THE TOXICOLOGICAL PROPERTIES HAVE NOT
BEEN THOROUGHLY INVESTIGATED.
Explanation of Carcinogenicity:NOT RELEVANT
Effects of Overexposure:SEE HEALTH HAZARDS.
Medical Cond Aggravated by Exposure:NONE SPECIFIED BY MANUFACTURER.

First Aid:INGEST:WASH OUT MOUTH W/WATER PROVIDED PERSON IS CONSCIOUS.
CALL MD. SKIN:FLUSH W/COPIOUS AMTS OF WATER FOR @ LST 15 MIN.
REMOVE CONTAM CLTHG & SHOES & CALL MD. INHAL:REMOVE TO FRESH AIR.
IF BRTHG BEC OMES DFCLT, CALL MD. EYES:FLUSH W/COPIOUS AMTS OF
WATER FOR @ LST 15 MIN. ASSURE ADEQ FLUSHING BY SEPARATING EYELIDS
W/FINGERS. CALL MD.

Extinguishing Media:CARBON DIOXIDE, DRY CHEMICAL POWDER, ALCOHOL OR
POLYMER FOAM.
Fire Fighting Procedures:WEAR NIOSH/MSHA APPROVED SCBA & FULL
PROTECTIVE EQUIPMENT .
Unusual Fire/Explosion Hazard:EMITS TOXIC FUMES UNDER FIRE CONDITIONS.

Spill Release Procedures:WEAR NIOSH/MSHA APPROVED RESPIRATOR, CHEMICAL
SAFETY GOGGLES, RUBBER BOOTS AND HEAVY RUBBER GLOVES. SWEEP UP,
PLACE IN A BAG AND HOLD FOR WASTE DISPOSAL. AVOID RASING DUST.
VENTILATE AREA AND WASH SPI LL SITE AFTER MATERIAL PICKUP IS
COMPLETE.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:WEAR SUITABLE PROTECTIVE CLOTHING.
PROTECT FROM LIGHT AND AIR. HYGROSCOPIC.
Other Precautions:NONE SPECIFIED BY MANUFACTURER.

Respiratory Protection:NIOSH/MSHA APPROVED RESPIRATOR.
Ventilation:MECHANICAL EXHAUST.
Protective Gloves:CHEMICAL RESISITANT GLOVES.
Eye Protection:ANSI APPROVED CHEM WORKERS GOGGS .
Other Protective Equipment:ANSI APPROVED EMERGENCY EYE BATH AND DELUGE
SHOWER .
Work Hygienic Practices:NONE SPECIFIED BY MANUFACTURER.
Supplemental Safety and Health
NONE SPECIFIED BY MANUFACTURER.

Solubility in Water:SOLUBLE
Appearance and Odor:WHITE POWDER WITH SLIGHT CHARACTERISTIC ODOR.

Stability Indicator/Materials to Avoid:YES
AVOID CONTACT WITH METALS.
Stability Condition to Avoid:AIR AND LIGHT SENSITIVE.
Hazardous Decomposition Products:TOXIC FUMES OF:CARBON MONOXIDE AND
CARBON DIOXIDE, NITROGEN OXIDES, SULFUR OXIDES, HYDROGEN CHLORIDE
GAS.

Waste Disposal Methods: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
LAWS.

Disclaimer (provided with this information by the compiling agencies):
This information is formulated for use by elements of the Department
of Defense. The United States of America in no manner whatsoever,
expressly or implied, warrants this information to be accurate and
disclaims all liability for its use. Any person utilizing this
document should seek competent professional advice to verify and
assume responsibility for the suitability of this information to their
particular situation.