سدیم دی هیدروژن فسفات دی هیدرات 99% کد 106342 مرک





Sodium dihydrogen phosphate dihydrate
for analysis EMSURE® Reag. Ph Eur
Synonym(s): Sodium phosphate monobasic dihydrate, mono-Sodium orthophosphate, Sodium biphosphate, Sodium phosphate monobasic, Sodium dihydrogen phosphate dihydrate



Analysis Note

Identity: passes test
Appearance of solution: passes test
Assay (alkalimetric, calculated on dried substance): 99.0 - 100.5 %
In water insoluble matter (calculated on dried substance): ≤ 0.15 %
pH-value (1 %, water): 4.1 - 5.0 pH-value (5 %; water): 4.2 - 4.5
Chloride (Cl): ≤ 0.0005 %
Fluoride (F): ≤ 0.001 %
Total nitrogen (as N): ≤ 0.001 %
Hydrogenphosphate (HPO₄): ≤ 0.5 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.0005 %
Al, Ca and other elements detectable with ammonia: passes test
As (Arsenic): ≤ 0.00005 %
Ca (Calcium): ≤ 0.005 %
Cd (Cadmium): ≤ 0.0001 %
Co (Cobalt): ≤ 0.005 %
Cu (Copper): ≤ 0.005 %
Fe (Iron): ≤ 0.001 %
Hg (Mercury): ≤ 0.0001 %
K (Potassium): ≤ 0.005 %
Mg (Magnesium): ≤ 0.005 %
Ni (Nickel): ≤ 0.005 %
Pb (Lead): ≤ 0.0004 %
Zn (Zinc): ≤ 0.025 %
Substances reducing potassium permanganate (as O): passes test
Loss on drying (130 °C): 21.5 - 24.0 %
Corresponds to Reag. Ph. Eur.