Thioglycolic Acid
CAS Number: 68-11-1
Thioglycolic acid (TGA) is a bifunctional thiol acid used as a chain transfer agent in acrylic and vinyl polymerization, and as the active ingredient in cold wave and depilatory formulations. In polymer synthesis, TGA introduces carboxyl-terminated chain ends that enhance colloidal stability and provide coupling sites for further functionalization.
Technical Specifications
| appearance | Colorless to pale yellow transparent liquid |
| purity (%) | ≥98.0 |
| color (APHA) | ≤20 |
| thiol content (%) | ≥30.0 |
| acidity (as TGA, %) | ≥98.0 |
Applications
- Chain transfer agent for carboxyl-terminated acrylic and vinyl polymers
- Cold permanent wave solution reducing agent
- Depilatory cream active ingredient
- PVC thermal stabilizer (organotin mercaptoacetate precursor)
- Metal surface cleaning and rust removal agent
Key Features
- Dual thiol-acid functionality introduces both chain transfer and carboxyl end group in one step
- Carboxyl-terminated polymer chains improve colloidal stability and surface adhesion
- Water miscibility enables use in aqueous emulsion and solution polymerization
- Established use in PVC stabilizer synthesis as mercaptoacetate precursor
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CAS Number
68-11-1
Category
Polymer Synthesis ChemicalsAvailability
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