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NaH2PO4: Wikis


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Monosodium phosphate
CAS number 7558-80-7 Yes check.svgY
PubChem 23672064
Molecular formula NaH2PO4
Molar mass 119.98 g/mol
Appearance White powder or crystals
Solubility in water 59.9 g/100 mL (0°C)
EU Index Not listed
NFPA 704
NFPA 704.svg
Flash point Non-flammable
Related compounds
Other cations Monopotassium phosphate
Monoammonium phosphate
Related compounds Disodium phosphate
Trisodium phosphate
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Monosodium phosphate (NaH2PO4), also known as anhydrous monobasic sodium phosphate is a chemical compound of sodium with a phosphate counterion. It is used as a laxative and, in combination with other sodium phosphates, as a pH buffer.

The pKa is 7.20. The sodium chloride equivalent value, or E-Value, is 0.49. It is soluble in 4.5 parts water. It is most commonly available as colorless crystals or a white powder. It is insoluble in alcohol.


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