Product Information
Chemical Name Calcium Thioglycolate Trihydrate
Synonyms Thioglycolic acid calcium salt trihydrate, Calcium mercaptoacetate trihydrate
CAS Number 65208-41-5
EINECS No. 613-757-2
Molecular Formula C₄H₆CaO₄S₂.3H₂OMolecular Weight 276.34 g/mol
Grade Cosmetic Grade
Chemical Family Mercapto-carboxylate calcium salt hydrate
INCI Name Calcium Thioglycolate
HS Code 29309090
Physical & Chemical Properties
Appearance White or off-white crystalline powder
Odor Faint mercaptan-like odour
Solubility Freely soluble in water; practically insoluble in ethanol, ether
pH (1 % aqueous solution,20℃) 10.8-12.2
Stability Sensitive to air & light; easily oxidized; avoid contact with iron, copper metal ions
Loss on drying 18.0-22.0 % (trihydrate water content)
Quality Specification (Cosmetic Standard)
| Test Item | Specification |
|---|---|
| Assay (calculated on dried basis) | ≥98.0 % |
| Loss on drying | 18.0‑22.0 % |
| Iron (Fe) | ≤ 10 ppm |
| Heavy metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Water‑insoluble matter | ≤0.10 % |
Application & Use
Core active ingredient for cosmetic depilatory products, breaks hair keratin disulfide bonds to achieve hair-removal effect.
Reducing agent for cold perm / hair-waving cosmetic formulations.
Important note: Distinguish from anhydrous calcium thioglycolate (CAS 814-71-1). Trihydrate CAS 65208-41-5 is the mainstream commercial cosmetic raw‑material globally.
Fine-chemical reducing agent for custom synthesis.
Packing, Delivery & Storage
Packaging options: 25 kg fibre drum; or as per request.
Lead-time: 7-15 working days against deposit.
Storage condition: Keep container tightly sealed. Store in cool, dry, dark, well-ventilated warehouse. Shield from light and air oxidation. Keep away from oxidizing agents.
Shelf-life: 24 months under original sealed storage.
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