Melting point :225 °C (dec.) (lit.)
Boiling point :293.9±35.0 °C(Predicted)
Density :1.197 (estimate)
refractive index :1.5130 (estimate)
storage temp. :Keep in dark place,Inert atmosphere,Room temperature
solubility :Aqueous Acid (Sparingly), DMSO (Sightly), Water (Slightly)
pka :2.07±0.10(Predicted)
form :Powder
color :White to off-white
Water Solubility :Soluble in water (partly), 1 N HCl (25 mg/ml), ethanol, and acetic acid. Insoluble in acetone.
BRN :1721406
Stability :Stable. Incompatible with strong oxidizing agents,
Major Application :peptide synthesis
Cosmetics Ingredients Functions :ANTIOXIDANT
HAIR CONDITIONING
REDUCING
HAIR WAVING OR STRAIGHTENING
FRAGRANCE
ANTISTATIC InChI :1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)
InChIKey :XUJNEKJLAYXESH-UHFFFAOYSA-N
SMILES :NC(CS)C(O)=O
LogP :0.230 (est)
CAS DataBase Reference :3374-22-9(CAS DataBase Reference)
NIST Chemistry Reference :DL-Cysteine(3374-22-9)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.