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S9763

Sigma-Aldrich

Sodium phosphate dibasic

ACS reagent, ≥99.0%

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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

Agency

suitable for SM 5210

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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This Item
71640S087671636
Sodium phosphate dibasic ACS reagent, ≥99.0%

Sigma-Aldrich

S9763

Sodium phosphate dibasic

Essential Grade
Sodium phosphate dibasic puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)

Sigma-Aldrich

71640

Sodium phosphate dibasic

Essential Grade
Sodium phosphate dibasic ReagentPlus®, ≥99.0%

Sigma-Aldrich

S0876

Sodium phosphate dibasic

-
Sodium phosphate dibasic BioUltra, for molecular biology, ≥99.5% (T)

Sigma-Aldrich

71636

Sodium phosphate dibasic

Premium Grade
agency

suitable for SM 5210

agency

-

agency

-

agency

-

assay

≥99.0%

assay

≥99.0% (T)

assay

≥99.0%

assay

≥99.5% (T)

form

powder

form

powder (or crystals)

form

powder or crystals

form

coarse powder, fine crystals

impurities

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

impurities

≤0.001% total nitrogen (N)

impurities

-

impurities

DNases, none detected, RNases, none detected, insoluble matter, passes filter test, phosphatases, none detected, proteases, none detected, ≤0.001% total nitrogen (N)

pH

8.7-9.3 (25 °C, 5% in solution)

pH

8.7-9.3 (25 °C, 50 mg/mL in H2O)

pH

8.9-9.2 (25 °C, 50 g/L in water)

pH

8.8-9.4 (25 °C, 0.5 M in H2O)

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

Legal Information

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

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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