Potassium Sorbate
AKA “4-HEXADIENOIC ACID, POTASSIUM SALT”
Acid
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Ingredient Facts
Potassium sorbate
AKA: 4-HEXADIENOIC ACID, POTASSIUM SALT
Acid · Preservative | Antimicrobial · EWG: 2
Plant-Derived
Preservative
Acid
Clean
Potassium Sorbate is a gentle preservative that keeps your product fresh and effective by preventing bacterial and mold growth.
Formula
C6H7KO2
Mol. Weight
150.22
CAS #
24634-61-5, 590-00-1
Form
Powder
Plant-Derived
Synthetic. Potassium sorbate is derived from sorbic acid, an organic compound synthesized from petroleum-based feedstocks or renewable sources. It is produced by neutralizing sorbic acid with potassium hydroxide through acid-base reaction.
Function
Preservative | Antimicrobial
Benefits
Preservative
Prevents microbial growth
Provides scent
Traditional Use
A synthetic organic acid developed in the 20th century, sometimes used as a preservative and pH buffer in cosmetic formulations.
Skin Types
gentle
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Caution
EWG Score2
CIR Safety Findings
ewg-2, medical-approval, pregnancy-nursing-safe, Phototoxicity Concern
Concentration Guide
0.6%
0%1%
Reg. Limit
EU regulatory limit: 0.6%. Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 4.
Regulatory Agencies
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Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR