Monosodium Phosphate Anhydrous CAS 7558-80-7 sodium dihydrogen phosphate anhydrous Sodium dihydrogen phosphate

Place of Origin: Shandong,China (Mainland)
Brand Name: MOSINTER
CAS No.: 7558-80-7
Molecular formula: H2NaO4P
Molecular weight: 119.98
Boiling point: 100°C
Density: 1.40 g/mL at 20 °C
Melting Point: <0°C
Solubility: H2O: 5 M, clear, colorless
Form: powder
Storage condition: Store at RT.
Sensibility: Hygroscopic
Stability: Stable. Incompatible with heavy metals, strong acids.


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Payment Terms:L/C, T/T, WUProduction Capacity:10000 Tons/year
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Monosodium Phosphate Anhydrous (CAS: 7558-80-7)




White crystal

 Main content,  % min


 Phosphorus pent-oxide,  % min


 PH of 1% water solution,   


 Water insoluble, % max


Monosodium phosphate (NaH2PO4)
, also known as anhydrous monobasic sodium phosphate and sodium dihydrogen phosphate, is an inorganic compound ofsodium with dihydrogen phosphate (H2PO4-) anion. One of many sodium phosphates, it is a common industrial chemical. It exists as an anhydrous salt, as well as mono- and dihydrates.

Production and reactions

The salt is obtained by partial neutralization of phosphoric acid. The pKa of monosodium phosphate is 6.8-7.2 (depending on the physicochemical characteristics during pKa determination).

Heating this salt above 169 °C gives the corresponding sodium acid pyrophosphate:

2 NaH2PO4 → Na2H2P2O7 + H2O


Phosphates are often used in foods and in water treatment. The pH of such formulations is generally adjusted by mixtures of various sodium phosphates, such as this salt. The sodium chloride equivalent value, or E-Value, is 0.49. It is soluble in 4.5 parts water.

Category: Other Chemical Products

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