Provitamin D2 (Ergosterol Irradiation Product)
Provitamin D2, derived from ergosterol through ultraviolet irradiation, is a sterol precursor that converts to vitamin D2 (ergocalciferol) upon further exposure to light. It falls under HTS 2936.90.0110 as a provitamin, chemically defined organic compound used primarily in vitamin production for nutritional supplements. This synthetic reproduction of a natural provitamin is essential for fortifying foods and pharmaceuticals.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If further processed into vitamin D2
Once converted to active ergocalciferol (vitamin D2), it classifies as a vitamin rather than provitamin under later numerical heading.
If imported as crude sterol mixture for industrial extraction
Bulk natural steroid extracts without specified provitamin purity fall under cyclic hydrocarbons, not chemically defined provitamins.
If pre-formulated into medicinal dosage forms
Provitamins in tablets or capsules for retail therapeutic use shift to Chapter 30 medicaments.
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Import Tips & Compliance
• Verify purity certificates and COA to confirm provitamin content meets Chapter 29 chemical definition requirements
• Ensure documentation specifies synthetic reproduction status to avoid misclassification as natural extracts
• Comply with FDA import alerts for vitamin precursors; provide stability data for solvent-containing forms
Related Products under HTS 2936.90.01.10
Provitamin A (Beta-Carotene Precursor)
Beta-carotene serves as the primary provitamin A, a carotenoid that the body converts to retinol (vitamin A) as needed. Classified under HTS 2936.90.0110 as a provitamin, this chemically defined compound is synthetically produced for use in fortified foods, supplements, and cosmetics. It meets Chapter 29 requirements for separate organic compounds used primarily as vitamin precursors.
7-Dehydrocholesterol (Provitamin D3)
7-Dehydrocholesterol is the natural provitamin D3 found in animal skin, which upon UVB exposure converts to cholecalciferol (vitamin D3). This synthetic or concentrated form is imported under HTS 2936.90.0110 as a provitamin for pharmaceutical and supplement production. It qualifies as a separate chemically defined organic compound per Chapter 29 notes.
Ergosterol (Provitamin D2 Base)
Ergosterol, a yeast/fungi sterol, serves as the base provitamin D2 precursor requiring irradiation for vitamin activation. Imported under HTS 2936.90.0110 as a purified provitamin for synthetic vitamin D2 production in supplements. Meets Chapter 29 criteria for chemically defined organic compounds with vitamin precursor function.
Beta-Cryptoxanthin Provitamin A
Beta-cryptoxanthin is a xanthophyll carotenoid functioning as provitamin A, convertible to retinol in vivo. This synthetic isolate classifies under HTS 2936.90.0110 as a provitamin derivative used primarily for vitamin A activity in nutritional products. It adheres to Chapter 29's chemical definition for provitamin compounds.