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dehydroacetic acid
AKA “Dehydroacetic acid”
Synthetic
Ingredient Facts
Dehydroacetic acid
Synthetic · Antioxidant · EWG: 1
Plant-Derived Synthetic
Antioxidant
Preservative
Synthetic
Clean
Dehydroacetic acid is a gentle preservative that keeps products fresh and prevents bacterial growth, helping extend shelf life without harsh chemicals.
CAS #
520-45-6, 771-03-9, 16807-48-0
Form
Liquid
See origin →
Functions
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Preserves Formula
Fights Bacteria
Prevents microbial growth
Traditional Use
Developed in the early 20th century as a synthetic preservative for cosmetics and food products. Created to address the need for stable, shelf-stable antimicrobial agents in place of less reliable natural preservation methods.
Skin Types
●all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
1
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
0.6%
0%1%
Reg. Limit
EU regulatory limit: 0.6%. Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 13.
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
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Verified Feb 2026
Data: CosIng · EWG · CIR