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NIOSH

DL-METHIONINE

ICSC: 0919

2-Amino-4-(methylthio)butyric acid
C5H11NO2S / CH3S(CH2)2CH(NH2)COOH
Molecular mass: 149.2
ICSC # 0919 		CAS # 59-51-8
RTECS # PD0456000
October 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Gives off irritating or toxic fumes (or gases) in a fire.

Powder, water spray, foam, carbon dioxide.
EXPLOSION


EXPOSURE


•INHALATION
Local exhaust.
Fresh air, rest.
•SKIN

Rinse skin with plenty of water or shower.
•EYES
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION
Do not eat, drink, or smoke during work.
Rinse mouth.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place.
Separated from strong oxidants. Well closed.

ICSC: 0919 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

DL-METHIONINE

ICSC: 0919

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS CRYSTALS OR WHITE POWDER.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes of sulfur oxides, nitrous oxides.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by ingestion.

INHALATION RISK:


EFFECTS OF SHORT-TERM EXPOSURE:


EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Melting point (decomposes): 281°C
Relative density (water = 1): 1.3
Solubility in water, g/100 ml at 20°C: 4.8

ENVIRONMENTAL
DATA


N O T E S

Neston, Lobamine, Dyprin, Cynaron, Acymethin are trade names.

ADDITIONAL INFORMATION



ICSC: 0919 DL-METHIONINE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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