Methyl Chloride Calibration Gas Mixture 1,000 ppm from China
Certified calibration gas containing 1,000 ppm chloromethane in nitrogen balance for environmental monitoring equipment. While a mixture, the chloromethane component drives classification under HTS 2903.11.00 per chapter notes allowing certain dissolved/prepared forms. Supplied in 17L steel cylinders.
Duty Rate — China → United States
40.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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
• Provide NIST-traceable certificates of analysis confirming exact concentration
• Classify cylinders as UN1956 compressed gas with proper valve protection
• Distinguish from Chapter 38 mixtures by emphasizing principal compound purity