cysteine
C3H7NO2S
Cysteine has the molecular formula C3H7NO2S and a molar mass of 121.16 g/mol.
Properties
| Molecular formula | C3H7NO2S |
|---|---|
| Molar mass | 121.16 g/mol |
| Exact (monoisotopic) mass | 121.01975 g/mol |
| logP (octanol–water) | -2.5 |
| Topological polar surface area | 64.3 Ų |
| Hydrogen-bond donors / acceptors | 3 / 4 |
| Heavy atoms | 7 |
| InChIKey | XUJNEKJLAYXESH-REOHCLBHSA-N |
| IUPAC name | (2R)-2-amino-3-sulfanylpropanoic acid |
Elemental composition
14 atoms across 5 elements, by mass.
| Element | Atoms | Percent by mass |
|---|---|---|
| Carbon (C) | 3 | 29.74% |
| Sulfur (S) | 1 | 26.46% |
| Oxygen (O) | 2 | 26.41% |
| Nitrogen (N) | 1 | 11.56% |
| Hydrogen (H) | 7 | 5.82% |
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Related compounds
Molar mass and elemental composition are computed from IUPAC 2021 conventional atomic weights. Formula, exact mass and the computed descriptors come from PubChem, which is US government work and in the public domain. Melting point, boiling point and density come from Wikidata under CC0. Properties with no figure shown are absent from those sources rather than zero.