| Melting point |
10-14 °C (lit.) |
| Boiling point |
102 °C/16 mmHg (lit.)
203-208 °C (lit.) |
| Density |
1.196 g/mL at 25 °C (lit.) |
| vapor pressure |
1.7 hPa (20 °C) |
| FEMA |
3180 | 2-MERCAPTOPROPIONIC ACID |
| refractive index |
n20/D 1.481(lit.) |
| Flash point |
190 °F |
| storage temp. |
2-8°C |
| solubility |
1g/L in organic solvents at 20 ℃ |
| form |
Liquid |
| pka |
pK1:4.32(0);pK2:10.20(SH) (25°C) |
| color |
Clear colorless to slightly yellow |
| PH |
2 (H2O, 20℃)(undiluted) |
| Odor |
at 0.01 % in propylene glycol. meaty sulfurous roasted |
| Odor Type |
sulfurous |
| biological source |
synthetic |
| Water Solubility |
MISCIBLE |
| JECFA Number |
551 |
| Merck |
14,9340 |
| BRN |
506218 |
| Cosmetics Ingredients Functions |
DEPILATORY ANTIOXIDANT FRAGRANCE HAIR WAVING OR STRAIGHTENING REDUCING |
| InChI |
1S/C3H6O2S/c1-2(6)3(4)5/h2,6H,1H3,(H,4,5) |
| InChIKey |
PMNLUUOXGOOLSP-UHFFFAOYSA-N |
| SMILES |
CC(S)C(O)=O |
| LogP |
1.15 at 20℃ |
| CAS DataBase Reference |
79-42-5(CAS DataBase Reference) |
| NIST Chemistry Reference |
2-Mercaptopropanoic acid(79-42-5) |
| EPA Substance Registry System |
Propanoic acid, 2-mercapto- (79-42-5) |