Triammonium Phosphate Crystals
Pure triammonium phosphate (NH4)3PO4 in crystalline form, a chemically defined inorganic salt used as a flame retardant and in chemical synthesis. It falls under HTS 2835.29.20.00 as a phosphate of triammonium, distinct from other ammonium phosphates like mono- or diammonium. This subheading covers specifically triammonium salts within the phosphates category of Chapter 28.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when blended into NPK fertilizers for agricultural use
Fertilizer mixtures containing triammonium phosphate fall under Chapter 31 as mineral or chemical fertilizers, not pure inorganic chemicals.
If chemically defined but prepared for specific industrial applications like flame retardant formulations
Complex preparations or mixtures not meeting pure compound criteria shift to heading 3824 for chemical products not elsewhere specified.
If actually monoammonium phosphate mislabeled as triammonium
Chapter notes specify classification by ammonium salt type; mono- or di- forms use different subheadings within 2835.
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Import Tips & Compliance
• Verify chemical purity and provide Certificate of Analysis (CoA) confirming triammonium composition to avoid reclassification as other ammonium phosphates
• Ensure SDS and proper hazardous material labeling if shipped in quantities exceeding exempt thresholds; triammonium phosphate can be irritant
Related Products under HTS 2835.29.20.00
Triammonium Phosphate Lab Grade
High-purity triammonium phosphate for laboratory reagents and analytical chemistry, meeting ACS specifications. Classified under HTS 2835.29.20.00 as a chemically defined phosphate of triammonium per Chapter 28 notes. Excludes organic derivatives or fertilizer blends.
Triammonium Phosphate Anhydrous Powder
Anhydrous (NH4)3PO4 fine powder for pharmaceutical buffering and nutrient media preparation. HTS 2835.29.20.00 applies to this chemically defined triammonium phosphate salt. Excludes hydrated forms if separately specified, but generally covered.
Flame Retardant Triammonium Phosphate
Specialty triammonium phosphate optimized for intumescent flame retardant coatings in construction materials. Strictly HTS 2835.29.20.00 as pure chemically defined triammonium phosphate. Used where char formation is needed upon heating.
Triammonium Phosphate 99% Pure
99% purity triammonium phosphate for water treatment pH adjustment and corrosion inhibition. Classifies under HTS 2835.29.20.00 per Chapter 28 definitions for inorganic ammonium phosphates. Chemically defined compound.
Microencapsulated Triammonium Phosphate
Triammonium phosphate microencapsulated for controlled release in polymer flame retardants. Remains HTS 2835.29.20.00 if chemically defined pure compound; encapsulation doesn't change base classification unless mixture.
Technical Grade Triammonium Phosphate
Technical-grade (NH4)3PO4 powder used in industrial flame retardants for textiles and plastics. Falls precisely under HTS 2835.29.20.00 for triammonium phosphates, as per legal definition excluding other ammonium variants. Chemically defined inorganic compound.