Dibenzothiophene from Canada
Dibenzothiophene is a tricyclic aromatic compound with sulfur heterocycle fused between two benzene rings. Classified HTS 2930.90.2900 as aromatic organo-sulfur with S directly linked to aromatic carbons. Common pollutant in petroleum; used in OLED materials research.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%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
• GC-MS analysis confirming >99% purity for chemically defined status
• Reference fuel standard applications require NIST traceability certification
• Not classifiable as Chapter 27 hydrocarbon per chapter exclusion