Tetramethylthiuram Monosulfide (TMTM) from Canada
Tetramethylthiuram monosulfide, commonly known as TMTM, is a thiuram monosulfide classified under HTS 2930.30.30.00 as an organo-sulfur compound used primarily as an accelerator in rubber vulcanization processes. It facilitates faster curing of rubber compounds at elevated temperatures, improving the mechanical properties of tires and industrial rubber products.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify chemical purity and provide Safety Data Sheets (SDS) for customs clearance; ensure packaging complies with DOT hazardous material regulations
• Common pitfall: mislabeling as di-sulfide variant leading to wrong HTS classification