Tributylphosphine Sulfide from Japan
Tributylphosphine sulfide ((C4H9)3P=S) contains phosphorus-sulfur with organic groups, classified as organo-sulfur compound in 2930.90.92. Used as ligand in catalysis and polymer chemistry.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Molecular structure diagram essential to document P=S classification under heading 2930
• Air-sensitive; inert atmosphere packaging documentation required
• Distinguish from pure phosphines (2931.00) via sulfur content analysis