Methyl Chloride Calibration Gas Mixture 1,000 ppm from Canada
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 — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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