Tetramethylthiuram Monosulfide from Canada
Tetramethylthiuram monosulfide (TMTM) is a thiuram accelerator used in rubber manufacturing. It falls under HTS 2930.20.90.50 as an 'other' dithiocarbamate derivative, qualifying as a chemically defined organo-sulfur compound under Chapter 29.
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
• Industrial end-use declaration helps maintain Chapter 29 classification vs Chapter 38
• CAS 97-36-9 declaration prevents confusion with polysulfides
• Bulk powder imports must specify particle size; dust additives may trigger note (g) limits