Potassium Chlorate
AKA “Potcrate, Anforstan, Fekabit, Kaliumchlorat, Berthollet salt, Salt of tarter, Berthollet's salt, Chlorate of potash”
Synthetic
Ingredient Facts
Potassium chlorate
AKA: Potcrate, Anforstan, Fekabit, Kaliumchlorat, Berthollet salt, Salt of tarter, Berthollet's salt, Chlorate of potash
Synthetic · Oxidising · EWG: 3
Synthetic
Synthetic
Clean
A gentle oxidizing agent that helps brighten and clarify skin by removing dead cells and surface impurities.
Solubility 8.61 g/100 g water at 25 °C
Formula
ClKO3
Mol. Weight
122.55
CAS #
3811-04-9
Form
Powder
State
Potassium chlorate appears as a white crystalline solid. Forms a very flammable mixture with combustible materials. Mixture may be explosive if combustible material is very finely divided. Mixture may
See origin →
Functions
Oxidising
Oxidizing Agent
Chemical oxidation
Traditional Use
Synthetic chemical compound developed in the 19th century with industrial origins. Historically used in some cosmetic and hygiene products, though now largely replaced by safer alternatives.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
3
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
all-shades-safe
Potential Sensitizer
Concentration Guide
5.0%
0%7%
Reg. Limit
EU regulatory limit: 5.0%. (a) 5% (b) 3% Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 6.
Regulatory Agencies
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR