Thiolactic acid is the organosulfur compound with the formula CH3CH(SH)CO2H. The molecule contains both carboxyl and thiol functional groups, −C(=O)−OH and −SH respectively. It is structurally related to lactic acid by the interchange of −SH for −OH. It is a colorless oil.
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| Names | |
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| Preferred IUPAC name
2-Sulfanylpropanoic acid | |
| Other names
2-Mercaptopropanoic acid | |
| Identifiers | |
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| ChemSpider | |
| ECHA InfoCard | 100.001.097 |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| CH3CH(SH)CO2H | |
| Molar mass | 106.14 g·mol−1 |
| Appearance | Colorless oil |
| Density | 1.22 g/cm3 |
| Melting point | 10 °C (50 °F; 283 K) |
| Related compounds | |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thiolactic acid was once widely used in hair permanent waving formulations, but has been displaced by formulations based on thioglycolic acid. Instead of using the acid itself, its salts (2-sulfanylpropanoates) are used. It is now mainly used for depilation.[1]
References
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