Vitamin B3 Niacin Technical Grade from Mexico
Technical grade nicotinic acid (98% min) for large-scale vitamin production and research applications. Classified as HTS 2936.29.16.20 'other' niacin due to primary vitamin functionality despite lower specification than USP grades. Supplied as white to off-white powder in industrial quantities.
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
• Differentiate from USP grade via specification sheet; technical grade still qualifies if primary vitamin use proven
• Test for pyridine odor/impurities; excessive contaminants trigger reclassification as chemical intermediate
• Declare CAS 59-67-6 prominently; generic 'vitamin powder' descriptions cause examination and delays