Tris(trimethylsilyl)phosphine from China
Tris(trimethylsilyl)phosphine [(Me3Si)3P] contains three direct P-Si-C linkages through silicon, qualifying as organo-inorganic with phosphorus-carbon connectivity via heteroatoms. Falls under HTS 2931.49.0080 as non-halogenated organo-phosphorus derivative. Used in low-valent phosphorus chemistry and semiconductor precursors.
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
• Provide structural analysis confirming P-Si-C chain meets organo-inorganic definition
• Pyrophoric nature requires inert atmosphere packaging; include handling instructions
• Air-sensitive; vacuum-sealed ampoules mandatory for import clearance