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255793

Sigma-Aldrich

Sodium phosphate dibasic

99.95% trace metals basis

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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.23

assay

99.95% trace metals basis

form

solid

impurities

≤550.0 ppm Trace Metal Analysis

pH

8.9-9.2 (25 °C, 50 g/L in water)

pKa (25 °C)

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

solubility

water: soluble

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
S0876S790771636
vibrant-m

255793

Sodium phosphate dibasic

-
vibrant-m

S0876

Sodium phosphate dibasic

-
vibrant-m

S7907

Sodium phosphate dibasic

Premium Grade
vibrant-m

71636

Sodium phosphate dibasic

Premium Grade
form

solid

form

powder or crystals

form

powder or crystals

form

coarse powder, fine crystals

assay

99.95% trace metals basis

assay

≥99.0%

assay

≥99.0%

assay

≥99.5% (T)

solubility

water: soluble

solubility

water: soluble 100 mg/mL

solubility

H2O: 1 M at 20 °C, clear, colorless

solubility

H2O: 0.5 M at 20 °C, clear, colorless

pH

8.9-9.2 (25 °C, 50 g/L in water)

pH

8.9-9.2 (25 °C, 50 g/L in water)

pH

8.0-11.0 (20 °C, 1 M in H2O)

pH

8.8-9.4 (25 °C, 0.5 M in H2O)

impurities

≤550.0 ppm Trace Metal Analysis

impurities

-

impurities

≤0.1% Insoluble matter

impurities

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

application

Sodium phosphate dibasic is widely used to prepare phosphate buffer for mobilephase for HPLC and cell separation techniques.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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