Trimethylchlorosilane from Mexico
Trimethylchlorosilane ((CH3)3SiCl) is a volatile organo-silicon reagent used in silylation reactions and silicone synthesis. Classified under HTS 2931.90.90.10 as it meets the definition of organo-inorganic compounds with silicon directly bonded to carbon, excluded from sulfonated/halogenated derivatives.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include CAS registry number (75-77-4) and purity analysis in commercial invoice for accurate HTS verification
• Ensure packaging meets UN hazardous material standards due to flammability and corrosivity
• Avoid bulk shipments without stabilizers, as they may reclassify under Chapter 38 if not meeting Chapter 29 purity notes