Potassium Chlorate
molecular structure · PubChem
AKA: 3811-04-9, Potcrate, Anforstan, Fekabit, Kaliumchlorat, Berthollet salt, Salt of tarter, Berthollet's salt, Chlorate of potash
Synthetic
Not Clean
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 be ignited by friction. Contact with strong sulfuric acid may cause fires or explosions. May spontaneously decompose and ignite when mixed with ammonium salts. May explode under prolonged exposure to heat or fire. Used to make matches, paper, explosives, and many other uses.
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
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.
EWG
3
CIR
Insufficient data
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
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR