Sulfur Dioxide Calibration Gas Mixture 10ppm from Japan
Trace-level sulfur dioxide (10 ppm in nitrogen balance) in certified calibration cylinders for environmental air quality monitoring equipment. Primarily classified under HTS 2811.29.30.00 when SO2 is the principal compound, though mixtures may shift. Chemically defined per Chapter 28 Note 1.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include NIST-traceable calibration certificates; declare exact ppm concentration on commercial invoice; EPA may require TSCA certification for monitoring gases