2931.90.90.29/Tetra-n-propylthiuram Disulfide/Canada

Tetra-n-propylthiuram Disulfide from Canada

Although primarily organo-sulfur, this thiuram accelerator contains tin impurities making it organo-inorganic under 2931 when tin-carbon bonds present. Falls under HTS 2931.90.90.29 as other organo-tin compounds.

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)

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Import Tips

• Provide elemental analysis showing tin content >1% for 2931 classification justification

• Comply with OSHA 1910.1000 Table Z-1-A exposure limits for thiuram dust

• Avoid Chapter 38 if purity >95%; mixtures go to 3812.10 for rubber accelerators