Vitamin B12 Reference Standard from China
Certified cyanocobalamin reference standard with assigned potency for analytical laboratories and pharmacopeia testing. HTS 2936.26.00.00 classification as pure B12 compound used primarily as vitamin calibration material. Supplied with NIST-traceable certificate.
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
• Include USP/EP reference standard certificate; DEA exempt but track narcotic-like controls; ambient storage only—no refrigeration claims