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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing additional hetero-atoms beyond oxygen only
Compounds with nitrogen or sulfur hetero-atoms fall under 'other heterocyclic compounds' in 2932.99, later in numerical order per Chapter Note 3.
If imported as a formulated mixture or solution for specific end-use
Mixtures not qualifying as Chapter 29 pure compounds are classified in Chapter 38 as chemical preparations.
If acyclic or not strictly lactone-structured
Non-cyclic alcohols or derivatives without heterocyclic oxygen ring go to earlier Chapter 29 acyclic headings.
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Import Tips & Compliance
• Verify purity certificates to confirm it meets Chapter 29 criteria for chemically defined organic compounds; ensure DEA precursor chemical registration if applicable; avoid retail packaging that could shift classification to Chapter 38
Related Products under HTS 2932.20.50.10
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.
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.
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.