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
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
• 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