Amines & Amides Available to Source

L-Cysteine Base

CAS 52-90-4 · MF C3H7NO2S · MW 121.16 g/mol

L-Cysteine Base is a sulfur-containing non-essential amino acid important for protein structure, antioxidant defense, and metabolic functions. It plays a

SDS / TDS Download
CAS Number
52-90-4
Molecular Formula
C3H7NO2S
Molecular Weight
121.16 g/mol
Material Family
Amines & Amides
Functional Roles
Physical Properties
melting_point
240 dec u00b0C
solubility
277000 mg/L (at 25 u00b0C)
vapor_pressure
0.00000207 [mmHg]
GHS / SDS Safety Warning
Irritant
  • H319 (11.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
  • H335 (11.9%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
  • H315 (11.9%): Causes skin irritation [Warning Skin corrosion/irritation]
  • H302: Harmful if swallowed [Warning Acute toxicity, oral]
  • H302 (55.6%): Harmful if swallowed [Warning Acute toxicity, oral]
Chemical Identity
CAS Number52-90-4
IUPAC Name(2R)-2-amino-3-sulfanylpropanoic acid
InChI KeyXUJNEKJLAYXESH-REOHCLBHSA-N
PubChem CID 5862
INCI NameCYSTEINE
Synonyms & Trade Names
L-cysteine cysteine Cystein (R)-2-Amino-3-mercaptopropanoic acid Thioserine Half-cystine L-(+)-Cysteine beta-Mercaptoalanine L-Cystein Cysteinum (2R)-2-amino-3-sulfanylpropanoic acid L-Cys cisteina Half cystine 2-Amino-3-mercaptopropionic acid
Full Description

L-Cysteine Base is a sulfur-containing non-essential amino acid important for protein structure, antioxidant defense, and metabolic functions. It plays a