INCI · preservative · CIR review pending · used in 7 products
Dehydroacetic Acid
Dehydroacetic Acid (CAS 520-45-6 / 771-03-9 / 16807-48-0) is a synthetic preservative used in cosmetic formulations, also known by the trade name Geogard 111A. Its IUPAC name is 3-Acetyl-6-Methyl-2H-Pyran-2,4(3H)-Dione. It carries the cosmetic restriction designation V/13 under CosIng regulations.
Evidence level
moderateEWG score
—Comedogenic
—Category
preservative● Benefits
Dehydroacetic Acid primarily acts against fungi and has a milder antibacterial effect, helping products maintain their integrity over time. It is effective at low concentrations (0.1–0.6%) and is both Ecocert and Cosmos approved, making it popular in natural and organic product formulations.
preservative
● Cautions
Subject to cosmetic restriction V/13; users and formulators should observe applicable regulatory concentration limits.
