Monobasic Sodium Phosphate dihydrate IP 1KG Go Back


: 13472-35-0

Molecular Formula

: NaH2PO4.2H2O

Molecular Weight

: 156.01
Description: A white powder or colorless crystals
Solubility: Very soluble in water, very slightly soluble in ethanol
Identification A (Phosphate 1): A light yellow precipitate should form, the color of which should not change by boiling and readily soluble in 10M ammonia and in dilute nitric acid
Identification A (Phosphate 2): White crystalline precipitate should form
Identification A (Phosphate 3): A bright yellow precipitate should form.
Identification B (Sodium 1 ): A dense white precipitate should form
Identification B (Sodium 2): No precipitate should form
pH: 4.1 - 4.5
Insoluble Substances: NMT 0.2%
Chlorides: NMT 140 ppm
Sulphate(SO4): NMT 0.15%
Aluminum, Calcium and Related Elements: Slightly alkaline solution should not become turbid
Arsenic (As): NMT 8 ppm
Heavy metal (Pb): NMT 20 ppm
Water: 18.0% to 26.5%
Assay (anhydrous basis): 98.0% - 103.0%
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