Raw Materials for PCE

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Thioglycolic acid

Thioglycolic acid has the characteristics of both hydroxyl acid reaction and sulfhydryl reaction, among which the most important reaction is the reaction with disulfide. Especially under basic conditions, it reacts with the cystine in the hair, breaks the -s-s – bond of cystine, and produces cysteine which is easy to curl. 

Thioglycolic acid

Item TGA 80% TGA 99%
Appearance Colourless or light yellow liquid Colourless or light yellow liquid
TGA % Min ≥80% ≥99%
Fe ppm(mg/kg) ≤0.5 ≤0.5
Relative density% 1.25-1.35 1.295-1.35
Main function

Mainly used as curling agent, hair removal agent, low toxic or non-toxic stabilizer of polyvinyl chloride, initiator of polymerization, accelerator and chain transfer agent, metal surface treatment agent. In addition, thioglycolic acid is a sensitive reagent for the determination of iron, molybdenum, aluminum, tin, etc. It can also be used as crystallization nucleating agent for polypropylene processing and coating, fiber modifier and blanket quick finishing agent.

Physical property data

Density : 1.326 g/mL at 20 °C(lit.)

Melting point (° C) : −16 °C(lit.)

Flash point (° C) : 126 °C

Solubility: soluble in water, soluble in ethanol, benzene, ether


Store in a cool, ventilated warehouse. Stay away from fire and heat. It should be stored separately with oxidant, reducing agent and alkali. Equipped with the corresponding variety and quantity of fire equipment. The storage area shall be equipped with emergency leakage treatment equipment and appropriate storage materials.