Sodium dihydrogen phosphate dihydrate Ph. Eur., USP, BP

Supplier: VWR Chemicals

Synonyms: Phosphoric acid (sodium hydrate), Sodium phosphate monobasic dihydrate, Sodium dihydrogen orthophosphate dihydrate

VWRC28014.291EA 33.8 SGD
VWRC28014.291 VWRC28014.360 VWRC28014.462
Sodium dihydrogen phosphate dihydrate Ph. Eur., USP, BP
Sodium dihydrogen phosphate dihydrate

Appearance: White or almost white, powder or colourless crystals.


Caution: Not for use as Active Pharmaceutical Ingredient (API)

Formula: NaH₂PO₄·2H₂O
MW: 156,01 g/mol
Boiling Pt: < 650 °C (1013 hPa)
Melting Pt: 60 °C
Density: 1,91 g/cm³ (20 °C)
Storage Temperature: Ambient
MDL Number: MFCD00149209
CAS Number: 13472-35-0
EINECS: 231-449-2
REACH: 01-2119489796-13
Merck Index: 12,08806

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Specification Test Results

Appearance Conforms (see CoA/CoS)
Heavy metals (as Pb) ≤10 ppm
Residual solvents Unlikely by manuf.process
As (Arsenic) ≤2 ppm
Cd (Cadmium) ≤1 ppm
Co (Cobalt) ≤1 ppm
Hg (Mercury) ≤3 ppm
Ni (Nickel) ≤1 ppm
Pb (Lead) ≤4 ppm
V (Vanadium) ≤5 ppm
Conforms to Ph.Eur./USP/BP Passes test
Ph.Eur./BP specifications: .
Assay (dried substance) [Ph.Eur./BP] 98.0 - 100.5 %
Identification A Passes test USP
Identification B Passes test USP
Identification C Passes test Ph.Eur./BP
Appearance of solution Passes test Ph.Eur./BP
pH (5 %) [Ph.Eur./BP] 4.2 - 4.5
Reducing substances Passes test Ph.Eur./BP
Cl (Chloride) [Ph.Eur./BP] ≤200 ppm
SO4 (Sulphate) [Ph.Eur./BP] ≤300 ppm
Fe (Iron) [Ph.Eur./BP] ≤10 ppm
Loss on drying (130°C) [Ph.Eur./BP] 21.5 - 24.0 %
USP specifications: .
Assay (calculated on anhydrous) [USP] 98.0 - 103.0 %
Insoluble substances [USP] ≤0.2 %
Cl (Chloride) [USP] ≤0.014 %
SO4 (Sulphate) [USP] ≤0.15 %
Al, Ca and related elements Passes test USP
As (Arsenic) [USP] ≤8 ppm
pH (25°C; 1 g/20 ml) [USP] 4.1 - 4.5
Water determination [USP] 18.0 - 26.5 %

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