CAS Number 7558-80-7
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Linear Formula NaH2PO4
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Molecular Weight 119.98
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EC Number 231-449-2
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MDL number MFCD00003527
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PubChem Substance ID 24899786
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eCl@ss 38070208
Monosodium phosphate (MSP), also known as anhydrous monobasic sodium
phosphate and sodium dihydrogen phosphate, is an inorganic compound of sodium with dihydrogen phosphate (H2PO4−) anion. One of many sodium
phosphates (such as NaPO3), it is a common industrial
chemical. It exists as an anhydrous salt, as well as mono- and dihydrates.
Detailed description
Uses
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.[1] The sodium chloride equivalent value, or
E-Value, is 0.49. It is soluble in 4.5 parts water.
Food additive
It is added in animal feed, toothpaste, and
evaporated milk. It is used as a thickening agent and emulsifier.
Detection of magnesium
Monosodium phosphate is used to detect the presence
of magnesium ions in salts. Formation of a white precipitate on the addition of
ammonium chloride, ammonium hydroxide and monosodium phosphate to an aqueous or
dilute HCl solution of the salt indicates presence of magnesium ions.
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