Tributylphosphine Sulfide from China
Tributylphosphine sulfide is an organo-sulfur-phosphorus compound used as a ligand precursor and polymer stabilizer. Classifies under HTS 2930.90.92.51 as other organo-sulfur with P-S-C connectivity. Stable white solid for catalysis applications.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• 31P NMR spectrum verifies structure (δ ~50 ppm)
• Air-stable unlike parent phosphine; simplified shipping
• Phosphorus content declaration required for waste treatment compliance