| 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 | n |
| Fp | 190 °F |
| storage temp. | 2-8°C |
| pka | pK1:4.32(0);pK2:10.20(SH) (25°C) |
| form | Liquid |
| color | Clear colorless to slightly yellow |
| PH | 2 (H2O, 20℃)(undiluted) |
| Water Solubility | MISCIBLE |
| JECFA Number | 551 |
| Merck | 14,9340 |
| BRN | 506218 |
| InChIKey | PMNLUUOXGOOLSP-UHFFFAOYSA-N |
| 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) |
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