StructureDehydroacetic acid
CAS No. 520-45-6
EC No. 208-293-9
Synonyms INCI: Dehydroacetic acid; 2-Acetyl-5-hydroxy-3-oxo-4-hexenoic acid, delta-lactone; 3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one; 3-Acetyl-6-methyl-2,4-pyrandione; 3-acetyl-6-methyl-2H-Pyran-2,4(3H)-dione; 3-Acetyl-6-methyl-2-pyranone; Dehydroacetic acid; DHA; DHAA; Pyran-2,4(3H)-dione, 3-acetyl-6-methyl-; 2-; 3-Acetyl-6-methyl-1-oxacyclohex-5-ene-2,4-dione; 3-Acetyl-6-methyldihydro-2,4-pyrandione; Methylacetopyronone

Dehydroacetic acid

Dehydroacetic acid (DHA) is a pyrone derivative and has a white crystalline powder physical aspect. It is almost insoluble in water and moderately soluble in most organic solvents.


  • Preservative and Fungicide particularly indicated for food and cosmetic applications
  • Environmental friendly stabilizers for PVC films
  • Agrochemical : Used in the synthesis of Mepanipyrim 
  • Anti-Enzyme in toothpastes
  • Veterinary API : Used in the synthesis of Clopidol 
  • Precursor of dimethyl-4-pyridones


Shelf Life

24 months from date of production under recommended storage conditions

Health & Safety

Detailed information on the product described can be found in our relevant Health and Safety Information (Material Safety Data Sheet)