Monobasic sodium phosphate anhydrous USP 5KG Go Back


: 7558-80-7

Molecular Formula

: NaH2PO4

Molecular Weight

: 119.98
Description: Colorless crystals or white, crystalline powder.Is odorless and is slightly deliquescent. Its solutions are acid to litmus and effervesce with sodium carbonate
Solubility: Freely soluble in water; practically insoluble in alcohol.
Identification A (Sodium): A dense precipitate should form.
Identification B (Phosphate 1): A neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide
Identification B (Phosphate 2): With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide.
Assay (Anhydrous basis): 98.0% - 103.0%
Insoluble Substances: NMT 0.2%
Chlorides: NMT 0.014%
Sulphate (SO4): NMT 0.15%
Aluminium, Calcium and Related Element: The sample solution should not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide.
Arsenic (As): NMT 8ppm
pH: 4.1 -4.5
Water: NMT 2.0%
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