Sodium dihydrogen orthophosphate monohydrate BP 5KG Go Back


: 10049-21-5

Molecular Formula

: NaH2PO4.H2O

Molecular Weight

: 137.99
Appearance: Colorless crystals or a white powder.
Solubility: Very soluble in water; very slightly soluble in ethanol (96%).
Identification A (By Chemical test): Solution should be slightly acid.
Identification B (Phosphate 1): A yellow precipitate whose color not change by boiling and which dissolves on addition of ammonia should form.
Identification B (Phosphate 2): A yellow color should develop.
Identification C (Sodium): A dense white precipitate should form.
Identification D (By Loss on drying): 11.5% - 14.5%
Acidity: pH of the solution should be 4.2 to 4.5
Clarity and colour of solution: Clear and colorless solution
Arsenic (As): 2ppm max
Iron (Fe): 10ppm max
Chlorides: 200ppm max
Sulphate (SO4): 300ppm max
Reducing substances: The solution retains a slight red color.
Loss on drying at 130°C: 11.5% - 14.5%
Assay (Dried substance): 98.0% - 100.5%
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