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52-67-5

Name 3,3-Dimethyl-D(-)-cysteine
CAS 52-67-5
EINECS(EC#) 200-148-8
Molecular Formula C5H11NO2S
MDL Number MFCD00064302
Molecular Weight 149.21
MOL File 52-67-5.mol

Chemical Properties

Appearance White to off-white crystalline powder
Melting point  210 °C (dec.)(lit.)
alpha  -65 º (c=5, 1M NaOH, on dry)
Boiling point  251.8±35.0 °C(Predicted)
density  1.113 (estimate)
refractive index  -63 ° (C=1, 1mol/L NaOH)
storage temp.  2-8°C
solubility  H2O: soluble100mg/mL
form  Powder
pka pKa 7.83±0.01(H2O,t =37±0.05,I=0.15)(Approximate)
color  White to almost white
Stability: Stable. Incompatible with strong oxidizing agents.
Water Solubility  11.1 g/100 mL (20 ºC)
Merck  14,7088
BRN  1722375
BCS Class 3
InChIKey VVNCNSJFMMFHPL-VKHMYHEASA-N
CAS DataBase Reference 52-67-5(CAS DataBase Reference)
NIST Chemistry Reference Penicillamine(52-67-5)
EPA Substance Registry System 52-67-5(EPA Substance)

Safety Data

Hazard Codes  Xi,T,Xn
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
R40:Limited evidence of a carcinogenic effect.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S24/25:Avoid contact with skin and eyes .
S22:Do not breathe dust .
WGK Germany  2
RTECS  YV9425000
Hazard Note  Toxic
HS Code  29309016
Safety Profile
Poison by intraperitoneal route. Moderately toxic by subcutaneous and intravenous routes. Mildly toxic by ingestion. An experimental teratogen. Human systemic effects by ingestion: agranulocytosis, dermatitis, fever, hemorrhage, increased body temperature, dermatitis, leukopenia, proteinuria, thrombocytopenia. Human teratogenic effects by an unspecified route: developmental abnormalities of the craniofacial areas, skin, and skin appendages, and body wall. Experimental reproductive effects. Questionable human carcinogen producing leukemia. Mutation data reported. Used in the treatment of rheumatoid arthritis, metal poisonings, and cystinuria. When heated to decomposition it emits very toxic fumes of NOx and SOx. See also MERCAPTANS.
Hazardous Substances Data 52-67-5(Hazardous Substances Data)
Toxicity
LD50 in rats (mg/kg): >10000 orally, >660 i.p. (Jaffe)

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