Sulfamic Acid Descaling Powder from China
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 — China → United States
39.2%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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