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Home/Compounds/Flavor & Fragrance/5-methyl-2-hepten-4-one
C8H14O
126.2 g/mol
Flavor & FragranceWarning

5-Methyl-2-hepten-4-one

CAS81925-81-7EC617-270-6
Category
Flavor & Fragrance
Compound Class
Other
Primary Use
flavor compound in food

5-Methyl-2-hepten-4-one is a flavor compound that has been identified in filberts (Corylus avellana). It is used as a flavoring ingredient in food products.

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

ReferenceSame Category

4-pentenol

CAS821-09-0

flavoring agent

ReferenceSame Category

2-nonanone

CAS821-55-6

Flavor and fragrance ingredient

ReferenceSame Category

Cyclohexyl methyl ketone

CAS823-76-7

Flavor and fragrance intermediate

ReferenceSame Category

Vanillyl butyl ether

CAS82654-98-6

Fragrance ingredient

Safety Reference

Flammable
Flammable
Harmful
Harmful
Warning
H226Flammable liquid and vapour
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H302Harmful if swallowed

Customs Tariff Classification

The international HS code for 5-Methyl-2-hepten-4-one (CAS 81925-81-7) is 2914.19.

HS code (international, 6-digit)

2914.19

EU CN code (8-digit)

2914 19 90

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

(E)-5-methylhept-2-en-4-one

InChIKey

ARJWAURHQDJJAC-GQCTYLIASA-N

SMILES

CCC(C)C(=O)/C=C/C

Synonyms (14)
  • (2E)-5-Methyl-2-hepten-4-one
  • (2E)-5-methylhept-2-en-4-one
  • (E)-5-Methyl-2-hepten-4-one
  • (E)-5-methylhept-2-en-4-one
  • 2-Hepten-4-one, 5-methyl-
  • 5-Methyl-(E)-2-hepten-4-one
  • 5-Methyl-2-hepten-4-one
  • 5-methylhept-2-en-4-one
  • Filbertone
  • filbert heptenone

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