Sodium di-hydrogen o-phosphate dihydrate BP 5KG Go Back

CASR

: 13472-35-0

Molecular Formula

: NaH2PO4.2H2O

Molecular Weight

: 156.01
Specifications  
Appearance: A white or almost white powder or colourless crystals.
Solubility: Very soluble in water, very slightly soluble in ethanol (96%)
Identification A (By Chemical test): Solution should be slightly acid
Identification B1 (Phosphate): A yellow precipitate should form which colour does not changes by boiling and which dissolves on addition of ammonia.
Identification B2 (Phosphate): A yellow color should develop
Identification C (for Sodium): A dense white precipitate should form
Appearance of solution: Clear and colorless solution
pH: 4.2 - 4.5
Reducing substances: The color of permanganate should not completely discharge
Chlorides: 200ppm max
Sulphate (SO4): 300ppm max
Arsenic (As): 2ppm max
Iron (Fe): 10ppm max
Loss on drying,130°C: 21.5% - 24.0%
Assay (on dried basis): 98.0% - 100.5%
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