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China and the United States are the leading exporters of disodium phosphate, collectively accounting for a majority of global shipments, while India, Vietnam, and Brazil represent the largest importers in recent years. Disodium phosphate prices have remained relatively stable amid steady demand from food, feed, and industrial applications. Export volumes from China have increased modestly since 2022, while U.S. exports have held steady, and Indian imports have grown notably—reflecting expanding domestic processing capacity and downstream manufacturing needs.
Disodium phosphate (Na₂HPO₄), CAS Number 7558-79-4, is a white, crystalline, odorless solid that is highly soluble in water and non-volatile; the anhydrous form melts at approximately 150 °C with decomposition. It is an inorganic salt and a common sodium phosphate buffer component. Industrially, it serves as a food additive (emulsifier, pH regulator, nutrient supplement), water treatment agent (scale and corrosion inhibitor), and formulation aid in detergents and cleaning products. It is also used in pharmaceuticals as a buffering and stabilizing excipient and in ceramics and metallurgy for surface treatment and fluxing applications.
Sodium Phosphate, Dibasic is used as a laboratory reagent and a buffer in chemical analysis. Other uses are in manufacturing ceramics, detergents, and enamels; as a mordant in dyeing; for fireproofing paper and wood; for weighting and printing silk; in the treatment of boiler water; as a sequestrant in food; as a dietary supplement; in soldering enamels; and in fertilizers. It is used therapeutically as a cathartic.
The anhydrous compound is white crystalline powder; hygroscopic; density 1.70 g/cm3; converts to sodium pyrophosphate at 240°C; soluble in water; 874 SODIUM PHOSPHATE, DIBASIC insoluble in alcohol. The dihydrate is a crystalline powder or granular solid; density 2.066 g/cm3 at 15°C; loses water of crystallization at 92.5°C. The heptahydrate is a powdered or granular crystalline solid; density 1.679 g/cm3; loses five molecules of water at 48°C. The dodecahydrate is made up of translucent crystals or granules; density 1.524 g/cm3; readily loses five water molecules on exposure to air at ambient temperature; melts at 35°C when the salt contains all water of crystallization; loses all water at 100°C. All the hydrates are soluble in water and insoluble in alcohol.
This chemical is included in Fine Chemicals. See more about what is Disodium Phosphate and Disodium Phosphate SDS information.
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