Tributylphosphine Sulfide from Mexico
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 — Mexico → 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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
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