Methyl Chloride Calibration Gas Mixture 1,000 ppm from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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