Sulfamic Acid Descaling Powder
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing 10%+ anionic/cationic surfactants
Surface-active preparations for cleaning shift from pure acids to Chapter 34.
If converted to sulfamate salts
Inorganic sulfates and sulfites include certain sulfamates under heading 2835.
If for foundry or metal treatment use with additives
Antiknock mixtures or additives for fuels/metals classify under Chapter 38.
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Import Tips & Compliance
• 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
Related Products under HTS 2811.19.61.10
Industrial Grade Sulfamic Acid
Pure sulfamic acid (H3NSO4) used in industrial cleaning and descaling applications to remove rust, limescale, and mineral deposits from metal surfaces. It falls under HTS 2811.19.61.10 as a chemically defined inorganic acid, specifically sulfamic acid, which is an other inorganic acid of nonmetals. This classification applies to its pure form without organic stabilizers.
Sulfamic Acid for Electroplating Baths
Specialty sulfamic acid for nickel electroplating baths, providing stable pH control and bright finishes. Classified in HTS 2811.19.61.10 as pure inorganic sulfamic acid, an other inorganic acid not excluded by Chapter notes. Essential for electronics manufacturing.
Technical Grade Sulfamic Acid Crystals
Crystalline technical grade sulfamic acid employed in metal pickling and surface treatment processes in manufacturing. Classified under HTS 2811.19.61.10 as it qualifies as a pure inorganic acid other than those specifically named, meeting Chapter 28 Note 1 criteria for chemical definition. Used primarily in industrial electroplating baths.
Pharmaceutical Grade Sulfamic Acid
High-purity sulfamic acid meeting USP standards for use as a pharmaceutical intermediate and stabilizer in drug formulations. It is classified in HTS 2811.19.61.10 because it is a chemically defined inorganic acid of nonmetals, not covered by other specific headings or Chapter exclusions. Primarily imported for API synthesis.
Anhydrous Sulfamic Acid Flakes
Anhydrous flake form of sulfamic acid for analytical chemistry and laboratory reagent applications. Classified under HTS 2811.19.61.10 as it is a simple inorganic acid meeting chemical definition requirements, distinct from complex acids or salts. Used in titrations and pH standardization.
Food Grade Sulfamic Acid
FCC-grade sulfamic acid approved for use as a processing aid in food manufacturing, such as beer line cleaning. It is imported under HTS 2811.19.61.10 as a chemically defined inorganic acid, provided purity meets food chemical codex standards without organic formulation. Not for direct food contact.