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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as Vitamin C with specific B vitamin classification
Vitamins with defined structures classify in later vitamin headings per numerical order rule.
If put up in dosage forms for retail
Pharmaceutical preparations exclude from Chapter 29 per section notes.
If as food preparation or additive mixture
Vitamin-containing mixtures for food use classify outside pure chemical compounds.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Chemical structure certification must emphasize lactone ring to justify Chapter 29 over vitamin preparations
• FDA registration required for food/pharma use; include DMF if for drug manufacturing
• Avoid retail packaging; bulk only to prevent reclassification under Chapter 30 pharmaceuticals
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.
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.