Merck
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RDD022

Sigma-Aldrich

Sodium phosphate dibasic

anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥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:
PubChem Substance ID:
NACRES:
NA.25

grade

anhydrous

Quality Level

product line

ReagentPlus®
Redi-Dri

assay

≥99.0%

form

powder

quality

free-flowing

loss

≤1.0% loss on drying

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: 100 mg/mL, clear, colorless

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 is a commonly used buffer in frozen formulations.

Packaging

500 g in poly bottle
1 kg in poly bottle
2.5 kg in poly drum

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC
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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