Description
Synonyms: Sodium phosphate dibasic dodecahydrate, Sodium monohydrogen phosphate, Sodium phosphate dibasic, sec-Sodium phosphate, Disodium hydrogen phosphate dodecahydrate, Disodium phosphate, di-Sodium hydrogen phosphate dodecahydrate
Linear Formula: Na2HPO4 · 12H2O
PROPERTIES
di-Sodium hydrogen phosphate dodecahydrate is typically used as a phosphate buffer system component for biomolecule downstream chromatography steps or final liquid formulation.
Agency
reag. ISO
reag. Ph. Eur.
Pack Size
500g
product line
EMSURE®
Assay
99.0-102.0% (alkalimetric)
form
solid
potency
>2000 mg/kg LD50, oral (Rat)
composition
Water, 57-61%
impurities
≤2.5% Sodium Dihydrogene phospate
pH
9.0-9.3 (20 °C, 50 g/L in H2O)
solubility
218 g/L
density
1.52 g/cm3 at 20 °C
bulk density
800‑900 kg/m3
anion traces
chloride (Cl–): ≤0.0005%
sulfate (SO42-): ≤0.005%
cation traces
As: ≤0.00005%
Cu: ≤0.0002%
Fe: ≤0.0005%
K: ≤0.005%
N: ≤0.001%
Pb: ≤0.0005%
heavy metals (as Pb): ≤0.0005%
storage temp.
15-25°C
Analysis Note
Assay (alkalimetric): 99.0 – 102.0 %
Identity: passes test
Appearance of solution: passes test
Sodium Dihydrogene phospate: ≤ 2.5 %
pH-value (5 %; water): 9.0 – 9.3
Chloride (Cl): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.005 %
Total nitrogen (N): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.0005 %
As (Arsenic): ≤ 0.00005 %
Cu (Copper): ≤ 0.0002 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.005 %
Pb (Lead): ≤ 0.0005 %
Reducing substances: passes test
Water: 57.0 – 61.0 %
Corresponds to ISO,Reag. Ph Eur
Identity: passes test
Appearance of solution: passes test
Sodium Dihydrogene phospate: ≤ 2.5 %
pH-value (5 %; water): 9.0 – 9.3
Chloride (Cl): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.005 %
Total nitrogen (N): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.0005 %
As (Arsenic): ≤ 0.00005 %
Cu (Copper): ≤ 0.0002 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.005 %
Pb (Lead): ≤ 0.0005 %
Reducing substances: passes test
Water: 57.0 – 61.0 %
Corresponds to ISO,Reag. Ph Eur
Legal Information
EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany
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