|The phosphate salts covered by this order include anhydrous Dipotassium Phosphate (“DKP”) and Tetrapotassium Pyrophosphate (“TKPP”), whether anhydrous or in solution (collectively “phosphate salts”). |
TKPP, also known as normal potassium pyrophosphate, Diphosphoric acid or Tetrapotassium salt, is a potassium salt with the formula K4P2O7. The CAS registry number for TKPP is 7320-34-5. TKPP is typically 18.7% phosphorus and 47.3% potassium. It is generally greater than or equal to 43.0% P2O5 content. TKPP is classified under heading 2835.39.1000, Harmonized Tariff Schedule of the United States (“HTSUS”).
DKP, also known as Dipotassium salt, Dipotassium hydrogen orthophosphate or Potassium phosphate, dibasic, has a chemical formula of K2HPO4. The CAS registry number for DKP is 7758-11-4. DKP is typically 17.8% phosphorus, 44.8% potassium and 40% P2O5 content. DKP is classified under heading 2835.24.0000, HTSUS.
The products covered by this order include the foregoing phosphate salts in all grades, whether food grade or technical grade. The products covered by this order includes anhydrous DKP without regard to the physical form, whether crushed, granule, powder or fines. Also covered are all forms of TKPP, whether crushed, granule, powder, fines or solution.
For purposes of the order, the narrative description is dispositive, not the tariff heading, American Chemical Society, CAS registry number or CAS name, or the specific percentage chemical composition identified above.