Dipentamethylenethiuram Tetrasulfide (DPTT) from Canada
DPTT functions as both sulfur donor and accelerator in low-sulfur rubber systems, particularly for heat-resistant compounds. As a thiuram polysulfide organo-sulfur compound for rubber processing, it classifies under HTS 2930.90.92.31.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Declare sulfur content precisely as it affects both classification and hazardous materials shipping
• Provide rubber formulation examples showing principal processing use
• Monitor for EU SVHC listing changes affecting import notifications