γ-Butyrolactone (Aromatic Derivatives)
Aromatic-substituted γ-butyrolactones are five-membered lactone rings with aromatic substituents, classified under HTS 2932.20.4500 as aromatic oxygen-heterocyclic lactones. Used as solvents and pharmaceutical intermediates.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fully aliphatic without aromatic rings
Aliphatic lactones classify under subsequent 'other' provisions in same heading.
If imported as chemical mixture or preparation
Solutions exceeding Chapter 29 solvent exceptions classify as chemical preparations.
If primarily alcohol cyclic derivative
Cyclic alcohol derivatives with lactone characteristics may classify under Chapter 29 alcohol headings.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide CoA confirming aromatic substitution on lactone ring to distinguish from aliphatic GBL (2932.20.5010)
• Include end-use statement specifying industrial solvent/pharma intermediate to avoid DEA scrutiny
• Package in industrial drums, not consumer sizes, to maintain chemical compound classification
Related Products under HTS 2932.20.45.00
Coumarin
Coumarin is an aromatic lactone compound with a fused benzene ring and α-pyrone ring, classified under HTS 2932.20.4500 as an aromatic heterocyclic lactone with oxygen hetero-atom only. It is commonly used as a fragrance in perfumes and flavoring agent in tobacco products.
Phthalide
Phthalide is a bicyclic aromatic lactone consisting of a benzene ring fused to a five-membered γ-lactone ring, falling under HTS 2932.20.4500 as an aromatic lactone. It serves as an intermediate in pharmaceutical synthesis and dye production.
Ascorbic Acid Lactone
Ascorbic acid (Vitamin C) contains a five-membered lactone ring with enediol functionality, classified as an aromatic-type heterocyclic lactone under HTS 2932.20.4500. Imported as bulk pharmaceutical and nutritional supplement intermediate.
Phthalolactone Blue Intermediate
Phthalolactone derivatives used as intermediates for blue dyes feature aromatic fused lactone structures, falling under HTS 2932.20.4500. Essential for pigment manufacturing.
Benzofuran-2(3H)-one
Benzofuran-2(3H)-one is a fused benzene-pyrrolidone lactone system classified as aromatic heterocyclic lactone under HTS 2932.20.4500. Used in pharmaceutical and polymer synthesis.
6-Hydroxy coumarin (Umbelliferone)
Umbelliferone (6-hydroxycoumarin) is a phenolic derivative of coumarin lactone with aromatic heterocyclic structure under HTS 2932.20.4500. Used in cosmetics and fluorescent indicators.