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S9763

Sigma-Aldrich

Sodium phosphate dibasic

ACS reagent, ≥99.0%

Synonym(s):
sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
Linear Formula:
Na2HPO4
CAS Number:
Molecular Weight:
141.96
EC Number:
MDL number:
eCl@ss:
38070211
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

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 (SO42-): ≤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

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General description

Sodium phosphate dibasic in combination with sodium phosphate monobasic is used in the preparation of oral sodium phosphate solution (OSPS), which is a purgative used for bowel cleansing before colonoscopy.

Application

Sodium phosphate dibasic has been used in:
  • the preparation of phosphate buffer saline solution for perfusion procedure
  • western blot
  • indirect enzyme linked immunosorbent assay

Packaging

100, 500 g in poly bottle
1, 2.5 kg in poly bottle
5, 12 kg in poly drum

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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