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.
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Alternative Classifications
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Import Tips & Compliance
• Provide CAS number (87-41-2) and IUPAC name verification on commercial invoice
• Declare research/chemical synthesis end-use to avoid medicinal preparation scrutiny
• Ensure solvent content <5% to qualify under Chapter note (e) transport exceptions
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.
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.
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.
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.