pH Correction Carbon Dioxide from Canada
Carbon dioxide gas for adjusting pH in wastewater treatment and aquaculture systems. Pure CO2 under HTS 2811.21.00.00 as it forms carbonic acid in solution, qualifying as an inorganic acid per Chapter 28.
Duty Rate — Canada → United States
13.7%
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
Import Tips
• Provide application data for environmental permits; test dissolution rates
• Avoid classifying as water treatment chemicals under 3824 if pure
• Monitor for microbial contamination in humid applications