High-Purity Riboflavin for Fermentation Media from Mexico
Analytical-grade Riboflavin for microbial growth media in biotech production. Still HTS 2936.23.00.00 as synthetic vitamin used primarily as such, industrial end-use doesn't change chemical classification.
Duty Rate — Mexico → 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
• Biotech-grade CoA with endotoxin limits; volumetric flask compatibility declaration; industrial vs food/pharma segregation