Tetramethylthiuram Disulfide (TMTD) from China
Tetramethylthiuram disulfide, commonly known as TMTD, is a thiuram disulfide used primarily as an accelerator in rubber vulcanization processes. It falls under HTS 2930.30.60.00 as it is a thiuram disulfide compound containing sulfur directly linked to carbon atoms, classified as an organo-sulfur compound per Chapter 29 notes. This chemical is supplied as a pure, separate organic compound without additives that would alter its classification.
Duty Rate — China → United States
137.5%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
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)
Import Tips
• Verify purity certificate to confirm it meets 'separate chemically defined organic compound' criteria; ensure MSDS and REACH compliance for handling thiuram compounds; avoid packaging that suggests retail sale to prevent reclassification