Disodium Phosphate Anhydrous USP
Disodium phosphate (Na2HPO4) is a chemically defined inorganic salt of mono- or disodium used as a buffering agent in pharmaceuticals and food processing. It falls under HTS 2835.22.00.00 as a phosphate of disodium, meeting Chapter 28 criteria for inorganic compounds. Commonly supplied as a white crystalline powder for industrial and USP-grade applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If marketed as fertilizer
Phosphates intended for soil application as fertilizers fall under Chapter 31, not Chapter 28 industrial chemicals.
If containing organic stabilizers >10%
Mixtures of inorganic phosphates with organic substances exceeding purity thresholds classified as chemical preparations.
If as complex salts with other metals
Double salts combining disodium phosphate with other metal ions fall under the complex salts heading per Chapter Note 6.
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Import Tips & Compliance
• Verify certificate of analysis (COA) confirming disodium phosphate purity >98% to avoid reclassification as mixtures under 2842
• For food/pharma imports, provide FDA prior notice and comply with 21 CFR labeling; common pitfall is missing heavy metal specs
• Use ISBP for LC payments; declare exact CAS 7558-79-4 to prevent customs holds on chemical identity
Related Products under HTS 2835.22.00.00
Monosodium Phosphate Dihydrate
Monosodium phosphate (NaH2PO4·2H2O) serves as an acidulant and sequestrant in beverages and metal treatment. Classified under HTS 2835.22.00.00 as a phosphate of mono- or disodium, it's a pure inorganic compound per Chapter 28 definitions. Typically imported in 25kg bags for food and industrial uses.
Disodium Phosphate Dodecahydrate
The dodecahydrate form (Na2HPO4·12H2O) is used in lab reagents and as a laxative in pharma products. It qualifies under HTS 2835.22.00.00 as disodium phosphate, an inorganic salt excluded from organic chapters. Efflorescent crystals requiring sealed packaging for import.
Sodium Acid Pyrophosphate
Sodium acid pyrophosphate (SAPP, Na2H2P2O7) acts as a leavening agent in baking powders and meat products. As a polyphosphate of disodium, it fits HTS 2835.22.00.00 per the polyphosphates provision in the heading. Food-grade versions dominate imports.
Tetrasodium Pyrophosphate
Tetrasodium pyrophosphate (TSPP, Na4P2O7) functions as a dispersant in ceramics and detergent builder. Though 'tetra', classified as disodium polyphosphate derivative under HTS 2835.22.00.00. Anhydrous powder for industrial applications.
Monosodium Phosphate Anhydrous
Anhydrous monosodium phosphate (NaH2PO4) used in buffer solutions and flame retardants. Pure form qualifies under HTS 2835.22.00.00 as mono-sodium phosphate. Hygroscopic powder requiring moisture-proof packaging.
Disodium Phosphate Food Grade
Food-grade disodium phosphate meets FCC standards for use in cheese processing and evaporated milk stabilization. HTS 2835.22.00.00 covers this chemically defined disodium salt. Typically 25kg fiber drums.