Cysteine (data page)

The complete data for Cysteine ()

Chemical structure of the amino acid cysteine

General information

Chemical formula: C₃H₇N O₂S
Molar mass: 121.16 g·mol⁻¹
Systematic name:
(2R)-2-amino-3-sulfanyl-propanoic acid
Abbreviations: C, Cys
Synonyms:
2-amino-3-mercaptopropanoic acid
2-amino-3-mercaptopropionic acid
2-amino-3-sulfanylpropanoic acid
3-mercaptoalanine
AIDS{-}160777
CHEBI:15356
CHEMBANK2703
NSC 63864
NSC647530
NSC8746
Zystein

Database data

SMILES: SCC(N)C(=O)O
InChI=1/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/f/h5H

ATC: N/A

CAS: [52-90-4] ^a

DrugBank: N/A

EINECS: 200-158-2

PubChem: 5862

Physical properties

Structure

Crystal data

Spectral data

UV-Vis

IR

NMR

MS

Phase behavior

Solid properties

T_m: 240 °C

Liquid properties

Gas properties

Hazard properties

MSDS

N/A

Main hazards:

- N/A

NFPA 704

Flash point

- N/A

RTECS number:
N/A

Chemical properties

XLogP: -2.988

pI: 5.07

pK_a: 1.91; 8.14; 10.28

Tautomers:

Hydrogen bond: donor - 2; acceptor - 3

Pharmacological properties

This box:

Except where noted otherwise, data relate to Standard temperature and pressure.
Reliability of data general note.

References

^a 52-90-4