Tributyltin Oxide from Canada
Tributyltin oxide is an organo-tin compound where tin atoms are directly linked to carbon atoms in butyl groups, classifying it under HTS 2931.90.90.29 as other organo-tin compounds. It is commonly used as a biocide in antifouling paints for marine applications.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
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
• Verify REACH and TSCA registration due to strict environmental regulations on organotin biocides
• Include detailed safety data sheets (SDS) and confirm Sn-C bonding for proper Chapter 29 classification
• Avoid misclassification as pesticide formulations under Chapter 38; pure compounds stay in 2931