Tetra-n-propylthiuram Disulfide from Germany
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 — Germany → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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