Thiuram E (Tetramethylthiuram Tetrasulfide) from Mexico
Thiuram E, or tetramethylthiuram tetrasulfide, functions as an ultra-accelerator in natural rubber vulcanization. Classified under HTS 2930.30.60.00 as other thiuram sulfides, it meets Chapter 29 criteria for organo-sulfur compounds with direct C-S bonds. This is supplied in pure form for chemical processing applications.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Certify as >98% purity to maintain Chapter 29 classification; provide end-use statement for rubber industry; watch for misclassification as pesticide disulfiram analog