2930.90.92/Tributylphosphine Sulfide/Japan

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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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