L-Cysteine,S-(carboxymethyl)- cas no:638-23-3
Synonyms: Alanine,3-[(carboxymethyl)thio]-, L- (6CI,8CI);(2R)-2-Amino-3-[(carboxymethyl)thio]propionic acid;(L)-2-Amino-3-(carboxymethylthio)propionicacid;(R)-S-(Carboxymethyl)cysteine;3-[(Carboxymethyl)thio]-L-alanine;AHR3053;Bronchokod;Carbocysteine;Chilvax;L-(Carboxymethyl)cysteine;LJ 206;Lisil;Lisomucil;Loviscol;Muciclar;Mucocis;Mucodyne;Mucofan;Mucolase;Mucolex;Pectox;Pulmoclase;Reomucil;Rhinathiol;Rhinatiol;S-(Carboxymethyl)-(R)-cysteine;Siroxyl;Thiodril;Transbronchin;L-Carbocysteine(S-CMC);
NameL-Cysteine,S-(carboxymethyl)-
CAS638-23-3
SynonymsAlanine,3-[(carboxymethyl)thio]-, L- (6CI,8CI);(2R)-2-Amino-3-[(carboxymethyl)thio]propionic acid;(L)-2-Amino-3-(carboxymethylthio)propionicacid;(R)-S-(Carboxymethyl)cysteine;3-[(Carboxymethyl)thio]-L-alanine;AHR3053;Bronchokod;Carbocysteine;Chilvax;L-(Carboxymethyl)cysteine;LJ 206;Lisil;Lisomucil;Loviscol;Muciclar;Mucocis;Mucodyne;Mucofan;Mucolase;Mucolex;Pectox;Pulmoclase;Reomucil;Rhinathiol;Rhinatiol;S-(Carboxymethyl)-(R)-cysteine;Siroxyl;Thiodril;Transbronchin;L-Carbocysteine(S-CMC);
EINECS(EC#)211-327-5
Molecular FormulaC5H9NO4S
Molecular Weight179.19426
Appearancewhite to slightly off-white amorphous powder
alpha-31 o (C=1, 10% NAH2CO3)
storage temp2-8°C
Hazard Xi: Irritant;
Risk R36/37/38
Safety
Moderately toxic by intraperitoneal route. Mildly toxic by ingestion. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of SOx and NOx.
Hazard Codes: 
Xi
WGK Germany: 2
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25-36-26
S24/25:Avoid contact with skin and eyes.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
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ipr-rat LD50:7800 mg/kg
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NIIRDN “Drugs in Japan. Ethical Drugs, 6th Edition 1982” Edited by Japan Pharmaceutical Information Center. 6 (1982),190. |
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scu-rat LD50:10,300 mg/kg
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NIIRDN “Drugs in Japan. Ethical Drugs, 6th Edition 1982” Edited by Japan Pharmaceutical Information Center. 6 (1982),190. |
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orl-mus LD50:8400 mg/kg
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NIIRDN “Drugs in Japan. Ethical Drugs, 6th Edition 1982” Edited by Japan Pharmaceutical Information Center. 6 (1982),190. |
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ipr-mus LD50:1433 mg/kg
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YKKZAJ Yakugaku Zasshi. Journal of Pharmacy. 94 (1974),1419. |
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scu-mus LD50:9 g/kg
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NIIRDN “Drugs in Japan. Ethical Drugs, 6th Edition 1982” Edited by Japan Pharmaceutical Information Center. 6 (1982),190. |
6. RTECS AY4342000
RTECS#: CAS# 638-23-3: AY4342000
LD50/LC50: RTECS:
CAS# 638-23-3: Oral, mouse: LD50 = 8400 mg/kg;
Oral, rat: LD50 = >15 gm/kg;
Carcinogenicity: S-Carboxymethyl-L-cysteine - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Other: The toxicological properties have not been fully investigated. See actual entry in RTECS for complete information.
