Chloromethane Silicone Monomer Precursor from China
High-purity chloromethane serves as the methylating agent in the direct process for producing dimethyldichlorosilane, the primary silicone monomer. Classified under HTS 2903.11.0010 as it is chemically defined chloromethane used in organosilicon synthesis. Ultra-high purity minimizes side reactions.
Duty Rate — China → United States
43%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Specify electronic grade purity (>99.999%) with metallic impurity analysis for semiconductor applications
• Coordinate with silicone polymer HTS 3910.00 declarations for complete supply chain
• Monitor for HCl byproduct formation during storage; requires alkaline scrubber systems