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L-Cysteine(CAS NO. 52-90-4)
CAS NO.
52-90-4
Name
L-Cysteine
Alias
(+)-2-Amino-3-mercaptopropionic acid; L-beta-Mercaptoalanine; CySH
Formula
C3H7NO2S
Formula weight
121.15
Structural formula
Water solubility
280 g/L (25 ºC)
Specific rotatory power
8.75 º (c=12, 2N HCl)
Melting point
220 ºC
Hazard Symbols
  Xn   
Safety Description
S26;S37/39   
Risk Codes
R22;R36/37/38