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71642

Sigma-Aldrich

Sodium phosphate dibasic

purum p.a., anhydrous, ≥98.0% (T)

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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.25

grade

purum p.a.

Assay

≥98.0% (T)

form

powder

loss

≤2% loss on drying, 110 °C

pH

8.8-9.4 (25 °C, 50 mg/mL in H2O)

pKa (25 °C)

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

solubility

water: soluble 50 mg/mL at 25 °C

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤1000 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤200 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

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
S7907S3264255793
Sodium phosphate dibasic purum p.a., anhydrous, ≥98.0% (T)

Sigma-Aldrich

71642

Sodium phosphate dibasic

-
Sodium phosphate dibasic BioXtra, ≥99.0%

Sigma-Aldrich

S7907

Sodium phosphate dibasic

Premium Grade
Sodium phosphate dibasic for molecular biology, ≥98.5% (titration)

Sigma-Aldrich

S3264

Sodium phosphate dibasic

-
assay

≥98.0% (T)

assay

≥99.0%

assay

≥98.5% (titration)

assay

99.95% trace metals basis

form

powder

form

powder or crystals

form

powder

form

solid

pH

8.8-9.4 (25 °C, 50 mg/mL in H2O)

pH

8.0-11.0 (20 °C, 1 M in H2O)

pH

8.9-9.2 (25 °C, 50 g/L in water)

pH

8.9-9.2 (25 °C, 50 g/L in water)

solubility

water: soluble 50 mg/mL at 25 °C

solubility

H2O: 1 M at 20 °C, clear, colorless

solubility

H2O: 100 mg/mL

solubility

water: soluble

anion traces

chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤1000 mg/kg

anion traces

chloride (Cl-): ≤0.05%, sulfate (SO42-): ≤0.05%

anion traces

chloride (Cl-): ≤40 ppm

anion traces

-

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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