Witherite Mineral Powder from Canada
Ground natural witherite reduced to powder form after extraction and optional calcining, maintaining its barium carbonate mineral identity. HTS 2511.20.00.00 covers this as natural barium carbonate in any physical state short of chemical alteration. Essential for drilling muds and pyrotechnics production.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit particle size analysis to demonstrate grinding is mechanical, not chemical processing
• Use MSDS sheets confirming no additives or synthetic barium sources were introduced
• Avoid bulk packaging that suggests chemical-grade purity to prevent scrutiny under Chapter 28