Dibasic sodium phosphate dodecahydrate USP/Ph.Eur/BP PARENTEX PLUS 500GM Go Back


: 10039-32-4

Molecular Formula

: Na2HPO4.12H2O

Molecular Weight

: 358.14
Description: Colorless, transparent crystals, very efflorescent
Solubility: Freely soluble in water; practically insoluble in ethanol (96%)
Identification (By chemical test): Solution should be slightly alkaline
Identification (By Loss on drying): 57.0% -61.0%
Identification (Sodium): A dense precipitate should form.
Identification (Phosphate 1): A yellow precipitate soluble in 2N nitric acid and in 6 N ammonium hydroxide should form.
Identification (Phosphate 2): With ammonium molybdate solution, acidified solutions should yield a yellow precipitate which should soluble in 6N ammonium hydroxide.
Identification (Phosphate 3): A yellow color should develop.
Assay (on dried basis): 98.0% - 100.5%
Assay: 98.5% - 102.5%
Insoluble Substances: NMT 20mg (NMT 0.4%)
Appearance of solution: Clear and colorless solution.
Reducing substances: The color of the permanganate should not completely discharge
Monosodium Phosphate: NMT 2.5%
Chlorides: NMT 200ppm
Sulphate (SO4): NMT 500ppm
Arsenic (As): NMT 2ppm
Iron(Fe): NMT 20ppm
Loss on drying at 130°C: 57.0% -61.0%
Total aerobic microbial count: NMT 100 CFU/gm
Total combined yeast and mould count: NMT 10 CFU/ gm
Bacterial endotoxin test: NMT 2.5 EU/gm
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