Dihydrofuran-2(3H)-one (Butyrolactone)
Dihydrofuran-2(3H)-one, synonymous with butyrolactone, is a lactone with a single oxygen hetero-atom in its heterocyclic ring, directly under HTS 2932.20.50.10. Essential for polymer and resin manufacturing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified by carboxylic acid function
Lactone oxygen-function could overlap 2918, but heterocyclic takes precedence later in order.
If for diol-derived ethers
If ether rather than lactone structure, earlier ether heading applies.
If mixtures for retail or specific use
Retail preparations exclude from Chapter 29 per notes.
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Import Tips & Compliance
• Confirm chemical identity via CAS 96-48-0 on invoices; segregate from GBL-misuse regulated shipments; use DOT-compliant packaging for transport stabilizers
Related Products under HTS 2932.20.50.10
Gamma-Butyrolactone (GBL)
Gamma-Butyrolactone (GBL) is a cyclic lactone, a five-membered heterocyclic ring compound containing one oxygen hetero-atom, classified under HTS 2932.20.50.10 as 'Butyrolactone'. It serves as a chemical intermediate in pharmaceutical and polymer production.
Butyrolactone Technical Grade 99%
Technical grade butyrolactone at 99% purity is a separate chemically defined organic compound fitting Chapter 29 note (a), specifically under lactones with oxygen hetero-atom(s) only in HTS 2932.20.50.10. Used in industrial synthesis of pyrrolidones and solvents.
γ-Butyrolactone USP Grade
USP-grade γ-Butyrolactone is a high-purity lactone meeting pharmaceutical standards, classified as a heterocyclic oxygen-only compound under HTS 2932.20.50.10 per Chapter 29 definitions. Primarily used as an intermediate for synthesizing GABA-related drugs.
Butyrolactone with Stabilizer
Stabilized butyrolactone includes necessary preservatives for transport as allowed by Chapter Note (f), remaining classified under HTS 2932.20.50.10 as the core lactone compound. Used in electronics cleaning formulations.
Industrial Butyrolactone Solvent Precursor
Industrial-grade butyrolactone serves as a precursor for solvents like NMP, classified as a pure lactone heterocyclic under HTS 2932.20.50.10 per Chapter 29(a). Meets criteria for separate chemically defined compound.