Sulfamic Acid Descaling Powder from Mexico
Powdered sulfamic acid packaged for industrial HVAC system descaling to remove calcium carbonate deposits. Falls under HTS 2811.19.61.10 as pure sulfamic acid, an inorganic oxygen compound of nonmetals, provided no organic additives exceed trace levels. Excluded from Chapter 38 if not a finished preparation.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Label clearly as 'pure sulfamic acid' with batch purity tests to prevent customs shifting to cleaning agents
• Use moisture-proof packaging to maintain stability; declare exact concentration to avoid sampling delays
• Watch for anti-dumping duties if sourced from certain countries; check Commerce Department listings