TBBS Rubber Accelerator (N-tert-Butyl-2-benzothiazolesulfenamide) from Canada
TBBS is a widely used delayed-action accelerator for NR and SR compounds in tire treads and sidewalls. Its aromatic benzothiazole sulfenamide structure mandates classification under HTS 3812.10.1000.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Submit batch certificates of analysis; ensure proper UN packaging group classification; pre-register with US EPA for new chemical introductions