Dehydoacetic Acid
Dehydoacetic Acid
DEH
8/10
Concern level
High concern
Dehydroacetic acid is a synthetic pyranone preservative used in cosmetics to inhibit bacterial and fungal growth, especially in leave-on and rinse-off products. It is valued for broad-spectrum preservative support at low use levels and is most effective in mildly acidic formulations.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Chemical Properties
Molecular Weight
168.15 g/mol pH Range
2.00 - 4.00Typical Concentration
0.10% - 0.60%CAS Number: 520-45-6
Skin Type Compatibility
dry skin7/10
oily skin7/10
sensitive skin6/10
acne prone7/10
mature skin7/10
normal skin8/10
Interactions
incompatible with: Highly alkaline formulations, Strong oxidizing systems, Preservative systems that already contain incompatible acid-labile ingredients
Risks & Warnings
Can cause mild skin and eye irritation in some users, especially at higher concentrations or in poorly formulated products. Pure ingredient data indicate harmfulness if swallowed, but cosmetic use is restricted to low levels. Avoid aerosol/spray use in the EU. Not ideal for very high-pH systems.
Vegan Cruelty-Free
