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Sodium hydrogen phosphate heptahydrate (Na2HPO4•7H2O)- Crystalline

Sodium hydrogen phosphate heptahydrate (Na2HPO4•7H2O)- Crystalline

CAS: 7782-85-6
Molecular Formula: Na2HPO4•7H2O
Purity: 98%
Products Code: TR1101150801CY
Specification Model: -100 Mesh
EINECS No.: 231-448-7
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Sodium hydrogen phosphate heptahydrate (Na2HPO4•7H2O)- Crystalline introduce:

Characteristic

 

Disodium phosphate (DSP), or sodium hydrogen phosphate, or sodium phosphate dibasic, is the inorganic compound with the formula Na2HPO4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as forms with 2, 7, 8, and 12 hydrates. All are water-soluble white powders; the anhydrous salt being hygroscopic.




Chemical formula:Na2HPO4

Molar mass:141.96 g/mol (anhydrous);177.99 g/mol (dihydrate);268.07 g/mol (heptahydrate)

Appearance:White crystalline solid

Odor:odorless

Density:1.7 g/cm3

Melting point:250 °C (482 °F; 523 K) decomposes

Solubility in water:7.7 g/100 ml (20 °C);11.8 g/100 mL (25 °C, heptahydrate)

Solubility:insoluble in alcohol

log P:-5.8

Acidity (pKa):2.15, 6.82, 12.35

Magnetic susceptibility (χ):−56.6·10−6 cm3/mol

Refractive index (nD):1.35644..1.35717 at 20°C

 


Application

 

Sodium hydrogen phosphate is widely used in detergents and cleaning agents. Combined with trisodium phosphate, it is employed in the food industry to adjust the pH and in water treatment to prevent calcium scale formation. It is utilized as a saline laxative to clean the bowel before a colonoscopy. It prevents the coagulation of condensed milk. It is also utilized as anti-caking additive in powdered products. It enhances the cook time and used as thickening agent in desserts and puddings.
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