C5H8O
84.12 g/mol
Flavor & FragranceDanger
3-Methyl-2-butenal
CAS107-86-8EC203-527-6
Category
Flavor & Fragrance
Compound Class
Other
Primary Use
flavoring agent and chemical intermediate
3-Methyl-2-butenal is an α,β-unsaturated aldehyde used as a flavoring agent and chemical intermediate. This colorless liquid serves as a building block in organic synthesis.
flavoring agentchemical intermediate
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
ApplicationSame Use
Butyric acid
CAS107-92-6
flavoring agent and chemical intermediate
ReferenceSame Category
2-acetylpyrrole
CAS1072-83-9
flavor and fragrance ingredient
ReferenceSame Category
Gamma-valerolactone
CAS108-29-2
Flavoring agent or solvent
ReferenceSame Category
2,6-dimethylpyrazine
CAS108-50-9
flavor and fragrance ingredient
ReferenceSame Category
Ethyl isovalerate
CAS108-64-5
Fragrance and flavor ingredient
Safety Reference
Danger
H226Flammable liquid and vapour
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H318Causes serious eye damage
H331Toxic if inhaled
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H402Harmful to aquatic life
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 3-Methyl-2-butenal (CAS 107-86-8) is 2912.19.
HS code (international, 6-digit)
2912.19
EU CN code (8-digit)
2912 19 00
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
3-methylbut-2-enal
InChIKey
SEPQTYODOKLVSB-UHFFFAOYSA-N
SMILES
CC(=CC=O)C
Synonyms (24)
- 2-BUTENAL, 3-METHYL-
- 2-METHYL-2-BUTEN-4-AL
- 3,3-Dimethyl-acrylaldehyde
- 3,3-Dimethylacrolein
- 3-METHYL-(E)-2-BUTENAL
- 3-Methyl-2-butenal
- 3-Methylbut-2-enal
- 3-Methylcrotonaldehyde
- 3-methyl-2-buten-1-al
- 3-methyl-2-butenaldehyde
- 3-methyl-but-2-en-1-al
- 3-methylbutenal
- Butenal, 3-methyl-
- Crotonaldehyde, 3-methyl-
- Prenal
- Senecialdehyde
- Senecioaldehyde
- beta,beta-Dimethylacrolein
- beta-Methylcrotonaldehyde
- dimethylacroleine
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