Tributylthiuram Tetrasulfide (TBzTD) from Canada
Tributylthiuram tetrasulfide (TBzTD) is a specialty thiuram tetrasulfide accelerator offering safe processing for low-sulfur rubber compounds. Under HTS 2930.30.60.00, it qualifies as 'other' thiuram sulfides within organo-sulfur compounds due to its molecular structure with multiple sulfur atoms linked to carbon. It is imported as a distinct chemical substance for industrial synthesis.
Duty Rate — Canada → United States
110%
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
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit NMR spectra confirming tetrasulfide structure; comply with EPA chemical import notifications; avoid anti-dusting agents exceeding Chapter 29 note (g) limits