Tetramethylthiuram Monosulfide from China
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 — China → United States
41.2%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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