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Riboflavin Vitamin B2 Phosphate Tablets from China

Riboflavin-5'-phosphate sodium (synthetic B2 from aromatic lumiflavin) 400mg tablets for migraine prophylaxis, retail doses. Under HTS 3004.50.40.00 for measured synthetic vitamins.

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)

Import Tips

Light-stability packaging required for flavins

Phosphate ester confirmation via HPLC

Avoid food colorant claims