Cysteine

C3H7NO2SCAS 3374-22-9121.15 g/mol

Open in Covalent MOL file
NH2HSOOH
Carboxylic acidPrimary amineThiol

Properties

Molecular formula
C3H7NO2S
Molar mass
121.15 g/mol
Exact mass
121.0197 Da
Melting point
222–225 °C
logP
-0.67Crippen estimate
Polar surface area
63.3 Ų
H-bond donors / acceptors
3 / 3
Rotatable bonds
2

Hazards

Warning
Irritant (GHS07)

Aggregated from 47 ECHA notifications, via PubChem; a share says how many notifiers assign that statement.

Precautionary statements

P264, P270, P301+P317, P330, P501

Identifiers

CAS number
3374-22-9
SMILES
NC(CS)C(=O)O
InChIKey
XUJNEKJLAYXESH-UHFFFAOYSA-N
InChI
InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)

Weigh it out

Type any one amount. The others follow from the molar mass.

Names and synonyms

6 names
  • Cysteine, DL-
  • DL-Cysteine
  • (±)-Cysteine
  • NSC 63864
  • (±)-2-Amino-3-mercaptopropionic acid
  • 2-Amino-3-sulfanylpropanoic acid

Work with Cysteine

Predict the NMR spectrum1H and 13C shifts with multiplicities Make a solutionWhat to weigh for any molarity and volume Check drug-likenessLipinski, Veber and lead-likeness Isotope patternExact mass and the mass spectrum pattern

Stereoisomers, salts and isotopologues

The same compound in another form: other stereochemistry, a salt or hydrate, the free acid or base, or an isotope-labelled version.

Cysteine52-90-4Defined stereoisomer D-Cysteine921-01-7Defined stereoisomer L-(+)-Cysteine hydrochloride52-89-1Salt, defined stereoisomer (±)-Cysteine hydrochloride10318-18-0Salt D-Cysteine hydrochloride32443-99-5Salt, defined stereoisomer Cysteine hydrochloride monohydrate7048-04-6Salt, defined stereoisomer DL-cysteine hydrochloride hydrate96998-61-7Salt Dl-cysteine hydrochloride monohydrate116797-51-4Salt

Similar compounds

Homocysteine454-29-563 % similar L-Homocysteine6027-13-063 % similar DL-Serine302-84-158 % similar D-Serine312-84-558 % similar L-Alpha,beta-Diaminopropionic acid4033-39-058 % similar 2,3-Diaminopropionic acid515-94-658 % similar Serine56-45-158 % similar Diaminopimelic acid583-93-758 % similar

Tanimoto similarity of circular fingerprints over the whole catalogue.

All similar compounds

Same formula

Cyclopropanesulfonamide154350-29-5

Elsewhere

PubChem CAS Common Chemistry NIST WebBook