2936.90.01.10/Provitamin D2 (Ergosterol Irradiation Product)/China

Provitamin D2 (Ergosterol Irradiation Product) from China

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.

Duty Rate — China → United States

100%

Rate breakdown

9903.04.60100%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate

9903.05.860%Universal product exemption (U.S. note 52(b))

9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

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Import Tips

• 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