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Record Information
Creation Date2014-10-14 21:20:32 UTC
Update Date2014-12-24 20:27:01 UTC
Accession NumberT3D4989
Common Name3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one
ClassSmall Molecule
Description3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one is a fungicide used against moulds on fresh and dried fruit. Now superseded.
Compound Type
  • Metabolite
  • Pesticide
  • Synthetic Compound
Chemical Structure
Dehydracetic acid
Dehydroacetic acid
Chemical FormulaC8H8O4
Average Molecular Mass168.147 g/mol
Monoisotopic Mass168.042 g/mol
CAS Registry Number771-03-9
IUPAC Name3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one
Traditional Name3-acetyl-4-hydroxy-6-methylpyran-2-one
InChI IdentifierInChI=1S/C8H8O4/c1-4-3-6(10)7(5(2)9)8(11)12-4/h3,10H,1-2H3
Chemical Taxonomy
Description belongs to the class of organic compounds known as aryl alkyl ketones. These are ketones have the generic structure RC(=O)R', where R = aryl group and R'=alkyl group.
KingdomOrganic compounds
Super ClassOrganic oxygen compounds
ClassOrganooxygen compounds
Sub ClassCarbonyl compounds
Direct ParentAryl alkyl ketones
Alternative Parents
  • Aryl alkyl ketone
  • Pyranone
  • Pyran
  • Heteroaromatic compound
  • Vinylogous acid
  • Lactone
  • Oxacycle
  • Organoheterocyclic compound
  • Organic oxide
  • Hydrocarbon derivative
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
Cellular Locations
  • Cytoplasm
  • Extracellular
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateNot Available
AppearanceNot Available
Experimental Properties
Melting Point109 °C
Boiling Point270 C; 518 F; 543 K
SolubilityNot Available
LogPNot Available
Predicted Properties
Water Solubility8.12 g/LALOGPS
pKa (Strongest Acidic)6.49ChemAxon
pKa (Strongest Basic)-6.5ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area63.6 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity43.43 m³·mol⁻¹ChemAxon
Polarizability15.82 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0v03-5900000000-88feceb65a900415a7feJSpectraViewer
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-00fu-9750000000-35bd9230699a5ce09dbcJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-014i-0900000000-fe08202ce08585250c13JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-014i-0900000000-bd5f45f8f94e766bd9d3JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0pc9-4900000000-414640773faaabce2565JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-014i-0900000000-0087476b0935000afd8bJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-004i-2900000000-5c44a21e733f2784dd8dJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-001i-9500000000-dbca1de8be7e3b295f4eJSpectraViewer
Toxicity Profile
Route of ExposureOral, I.V. (1)
Mechanism of ToxicityNot Available
MetabolismNot Available
Toxicity ValuesNot Available
Lethal DoseIn dogs, death invariably follows a dose of 400 mgm./kgm. or more of dehydroacetic acid when administered as the disodium salt, irrespective of the route of administration. (1)
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesNot Available
Minimum Risk LevelNot Available
Health EffectsNot Available
SymptomsAtaxia, retching and vomitng (1).
TreatmentNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDNot Available
PubChem Compound ID54678494
ChEMBL IDNot Available
ChemSpider ID10486535
KEGG IDNot Available
UniProt IDNot Available
ChEBI IDNot Available
BioCyc IDNot Available
CTD IDNot Available
Stitch IDNot Available
PDB IDNot Available
ACToR IDNot Available
Wikipedia LinkNot Available
Synthesis ReferenceNot Available
MSDSNot Available
General References
  1. SEEVERS MH, SHIDEMAN FE, WOODS LA, WEEKS JR, KRUSE WT: Dehydroacetic acid (DHA). General pharmacology and mechanism of action. J Pharmacol Exp Ther. 1950 May;99(1):69-83. [15429018 ]
  2. Yannai, Shmuel. (2004) Dictionary of food compounds with CD-ROM: Additives, flavors, and ingredients. Boca Raton: Chapman & Hall/CRC.
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available