Glucono-Delta-Lactone (GDL)
Glucono-delta-lactone is a six-membered lactone ring derived from gluconic acid, classified as other lactones under HTS 2932.20.50.50. Widely used as a slow-release acidulant in food processing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hydrolyzed to gluconic acid during import
Carboxylic acids take precedence over lactone form if ring opens, per oxygen function notes.
If pre-mixed with food preparations
Food preparations containing lactones classified by end use in Chapter 21.
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
• GRAS affirmation letter and FDA prior notice required for food use imports
• Specify particle size and purity grade; food vs technical grades may have different requirements
• Hydrolysis stability data prevents reclassification as gluconic acid salts
Related Products under HTS 2932.20.50.50
Gamma-Butyrolactone (GBL)
Gamma-Butyrolactone is a five-membered lactone ring heterocyclic compound with oxygen as the sole hetero-atom, classified under HTS 2932.20.50.50 as 'other lactones.' It is a colorless liquid used as a solvent and intermediate in pharmaceutical and polymer production.
Ascorbic Acid (Vitamin C) Lactone
Ascorbic acid contains a five-membered lactone ring with oxygen hetero-atom, falling under HTS 2932.20.50.50 as other lactones. This essential vitamin is used in food supplements, cosmetics, and pharmaceuticals for its antioxidant properties.
Phthalide
Phthalide is a bicyclic lactone with a five-membered oxygen-containing heterocyclic ring fused to benzene, classified under 2932.20.50.50. Used as an intermediate in dye and pharmaceutical synthesis.
Butyrolactone Technical Grade
Technical grade gamma-butyrolactone (GBL) with ≥99% purity, a simple five-membered lactone ring compound under HTS 2932.20.50.50. Used in resin production and as a polymer solvent.
Pantolactone
Pantolactone, a five-membered lactone used in pantothenic acid (Vitamin B5) synthesis, classified under HTS 2932.20.50.50 for other oxygen-heterocycle lactones. Essential intermediate for vitamin production.
Epsilon-Caprolactone
Epsilon-caprolactone is a seven-membered lactone ring used in polymer synthesis for biomedical applications, classified under HTS 2932.20.50.50. Key monomer for biodegradable polycaprolactone.