Sodium phosphate dibasic

grade

ACS reagent

Quality Level

200

Assay

≥99.0%

form

powder

impurities

≤0.002% Chloride (Cl)
≤0.01% Insoluble matter

loss

≤0.2% loss on drying 105°C

pH

8.7-9.3 (25 °C 5% in solution)

pKa (25 °C)

(1) 2.15 (2) 6.82 (3) 12.38 (phosphoric acid)

solubility

water: 5% at 25 °C clear

anion traces

sulfate (SO₄^2-): ≤0.005%

cation traces

Fe: ≤0.002%
heavy metals: ≤0.001% (by ICP-OES)

SMILES string

[Na+].[Na+].[H]OP([O-])([O-])=O

InChI

1S/2Na.H3O4P/c;;1-5(2 3)4/h;;(H3 1 2 3 4)/q2*+1;/p-2

InChI key

BNIILDVGGAEEIG-UHFFFAOYSA-L