Provitamins
Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent: > Other, including provitamins and natural concentrates > Provitamins
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2936.90.01.10
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.
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.