Tetrasodium Pyrophosphate
Tetrasodium pyrophosphate is an inorganic polyphosphate used as a buffering agent, emulsifier in foods, and dispersant in industrial cleaners. Classified under HTS 2835.29.51.00 as 'other' polyphosphates, it meets Chapter 28 definitions for chemically defined phosphorus compounds. Commonly supplied as white crystalline powder.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as single phosphate
Monophosphates like monosodium phosphate fall under 2835.25, but pyrophosphates are poly under 2835.29.
If organic phosphonate derivative
Organic phosphorus compounds shift to Chapter 29 per chapter exclusions.
If in superphosphate fertilizer blends
Fertilizer preparations containing phosphates are excluded to Chapter 31.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide detailed assay reports showing >95% purity to distinguish from mixtures under 3824
• Check FDA prior notice requirements for food-grade imports and ensure GRAS status documentation
• Avoid common pitfall of mislabeling as single phosphate, which could lead to incorrect 2835.25 duty
Related Products under HTS 2835.29.51.00
Sodium Tripolyphosphate (STPP)
Sodium tripolyphosphate is a polyphosphate salt used as a builder in detergents and for water softening in food processing. It falls under HTS 2835.29.51.00 as a polyphosphate, chemically defined inorganic compound of phosphorus. This classification applies to its anhydrous or hydrated forms used industrially.
Disodium Phosphate Anhydrous
Disodium phosphate (Na2HPO4) is a sodium salt of phosphoric acid used in dairy processing, pharmaceuticals, and as a pH buffer. It qualifies under HTS 2835.29.51.00 as 'other' phosphates, being a chemically defined inorganic compound per Chapter 28 notes. Available in granular or powder form.
Trisodium Phosphate Dodecahydrate
Trisodium phosphate dodecahydrate (Na3PO4·12H2O) serves as a cleaning agent, degreaser, and pH regulator in industrial and dairy applications. Falls under HTS 2835.29.51.00 as other phosphates, chemically defined per Chapter 28. The hydrated crystalline form is standard for commercial use.
Potassium Phosphate Monobasic
Potassium dihydrogen phosphate (KH2PO4) is used in fertilizers, pharmaceuticals, and as a buffering agent in lab reagents. Classified in HTS 2835.29.51.00 as other phosphates, it's a chemically defined inorganic potassium salt. High purity grades exceed 99%.
Sodium Hexametaphosphate
Sodium hexametaphosphate (SHMP) is a polyphosphate sequestering agent used in water treatment, ceramics, and food processing. It fits HTS 2835.29.51.00 as other polyphosphates, chemically defined under Chapter 28 exclusions. Glassy or powdered forms are typical.
Diammonium Phosphate
Diammonium phosphate ((NH4)2HPO4) functions as a fire retardant, yeast nutrient in baking, and pH buffer. Under HTS 2835.29.51.00 as other phosphates, it's chemically defined per Chapter 28 for ammonium salts. White crystalline powder form.