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.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳ChinaFreeFree
🇲🇽MexicoFreeFree
🇨🇦CanadaFreeFree
🇩🇪GermanyFreeFree
🇯🇵JapanFreeFree

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2936.29.50Same rate: Free

If after UV irradiation to cholecalciferol

Conversion to active vitamin D3 (cholecalciferol) moves classification to specific vitamin D3 subheading.

1504.10Higher: 12.5% vs Free

If extracted from bulk animal fats

Crude cholesterol fractions from Chapter 15 fats/oils, not purified provitamins of Chapter 29.

3822.90.00.00Higher: 10% vs Free

If imported as diagnostic reagent mixture

Formulations for laboratory vitamin D testing classify as biochemical diagnostic reagents.

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Import Tips & Compliance

Include UV absorption spectra verifying provitamin structure; animal-derived forms need BSE/TSE certification

Document solvent use per Chapter 29 note (e) if dissolved; stabilizer additions must be for transport only

Avoid 'vitamin D3' labeling to prevent premature classification; specify photo-conversion required

Related Products 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.

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.