Potassium Stearate

INCI: POTASSIUM STEARATE

CAS Number
593-29-3
Function
Cleansing, emulsifying, surfactant
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted; Mg/Zn stearate are GRAS; CIR concluded all stearate salts safe as used

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Minimal; mild erythema possible at elevated concentrations (>1.5% in aqueous systems); saturated chain eliminates oxidation concern

โš ๏ธ
Concern Level: None

Regulatory Flags

epa_safer_alternative fda_food_additive

Frequently Asked Questions

Is Potassium Stearate safe in cosmetics?

Minimal; mild erythema possible at elevated concentrations (>1.5% in aqueous systems); saturated chain eliminates oxidation concern The EU classifies Potassium Stearate as "permitted". Safety rating: EXCELLENT.

Is Potassium Stearate allowed in the EU?

Potassium Stearate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Potassium Stearate do in cosmetics?

Potassium Stearate functions as: Cleansing, emulsifying, surfactant. It is classified as a cosmetic ingredient in our database. CAS number: 593-29-3.

What is the Margin of Safety for Potassium Stearate?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

๐Ÿ“ฑ

Is Potassium Stearate in Your Products?

Scan any product label with Piro โ€” our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.

Try Piro Free โ†’

Analyze Your Full Ingredient List

Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Potassium Stearate in your formulation.