52-90-4 L-Amino-thopro-ponicacid

Superiority:

Product Name: L-Cysteine
Synonyms: L-Alanine, 3-mercapto-;L-Amino-thopro-ponicacid;L-Mercaptoalanine;NSC-8746;Propanoic Acid, 2-amino-3-mercapto-, (R)-;Thioserine;cysteine,b-mercapto-alanine;L-CYSTEINE FREE BASE, BIOTECHNOLOGY &
CAS: 52-90-4
MF: C3H7NO2S
MW: 121.16
EINECS: 200-158-2
Product Categories: API intermediates;Cysteine [Cys, C];Amino Acids;Amino Acids and Derivatives;alpha-Amino Acids;Antioxidant;amino;Biochemistry;Nutritional Supplements;L-Amino Acids;Amino Acids
Mol File: 52-90-4.mol

L-Cysteine Chemical Properties
Melting point  220 °C (dec.)(lit.)
alpha  8.75 º (c=12, 2N HCl)
Boiling point  293.9±35.0 °C(Predicted)
density  1.197 (estimate)
FEMA  3263 | L-CYSTEINE
refractive index  8.8 ° (C=8, 1mol/L HCl)
storage temp.  Store at RT.
solubility  H2O: 25 mg/mL
pka 1.92(at 25℃)
form  Solid
color  White
PH 4.5-5.5 (100g/l, H2O, 20℃)
optical activity Optical rotation: +8° to +9° (c = 5, 1 N HCl, 20°C).
Water Solubility  280 g/L (25 ºC)
λmax λ: 260 nm Amax: 1.5
λ: 280 nm Amax: 0.2
Sensitive  Air Sensitive
Merck  14,2781
JECFA Number 1419
BRN  1721408
Stability: Stability Stable, but may be air sensitive. Incompatible with oxidizing agents, bases.
CAS DataBase Reference 52-90-4(CAS DataBase Reference)
NIST Chemistry Reference L-Cysteine(52-90-4)
EPA Substance Registry System L-Cysteine (52-90-4)
Safety Information
Hazard Codes  Xn,Xi
Risk Statements  22-36/37/38-20/21/22
Safety Statements  36-37/39-26-24/25
WGK Germany  3
RTECS  HA1600000
F  10-23
Autoignition Temperature 420 °C
TSCA  Yes
HS Code  29309012
Hazardous Substances Data 52-90-4(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 1890 mg/kg