C5H6O2
98.1 g/mol
Pharmaceutical IntermediateWarning
Alpha-Methylene-gamma-butyrolactone
CAS547-65-9EC208-931-6
Category
Pharmaceutical Intermediate
Compound Class
Ester
Primary Use
Pharmaceutical Intermediate
Alpha-Methylene-gamma-butyrolactone is a butan-4-olide derivative featuring a methylene group at the 3-position. It is recognized as a pharmaceutical intermediate used in manufacturing and research applications.
pharmaceutical 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
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ReferenceSame Category
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ReferenceSame Category
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Safety Reference
Warning
H226Flammable liquid and vapour
H317May cause an allergic skin reaction
Customs Tariff Classification
The international HS code for Alpha-Methylene-gamma-butyrolactone (CAS 547-65-9) is 2932.20.
HS code (international, 6-digit)
2932.20
EU CN code (8-digit)
2932 20 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
3-methylideneoxolan-2-one
InChIKey
GSLDEZOOOSBFGP-UHFFFAOYSA-N
SMILES
C=C1CCOC1=O
Synonyms (27)
- -Methylene butyrolactone
- 2-Methylenebutanolactone
- 2-methylenebutyrolactone
- 3-methylideneoxolan-2-one
- Securolide
- TULIPALIN 98
- TULIPALINE A
- Tulipalin A
- Tulipaline
- Tulipane
- a-Methylene-g-butyrolactone
- a-methyl-y-butyrolactone
- alpha-Methylene butyrolactone
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