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RDD022

Sigma-Aldrich

Sodium phosphate dibasic

anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥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:
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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1 of 4

This Item
S97637164204276
Sodium phosphate dibasic anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, ≥99.0%

RDD022

Sodium phosphate dibasic

-
Sodium phosphate dibasic ACS reagent, ≥99.0%

S9763

Sodium phosphate dibasic

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

71642

Sodium phosphate dibasic

-
Sodium phosphate dibasic puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E 339, anhydrous, 98-100.5% (calc. to the dried substance)

04276

Sodium phosphate dibasic

Essential Grade
grade

anhydrous

grade

ACS reagent

grade

-

grade

-

product line

ReagentPlus®, Redi-Dri

product line

-

product line

-

product line

-

Quality Level

100

Quality Level

200

Quality Level

-

Quality Level

-

form

powder

form

powder

form

powder

form

powder

pH

8.9-9.2 (25 °C, 50 g/L in water)

pH

8.7-9.3 (25 °C, 5% in solution)

pH

8.8-9.4 (25 °C, 50 mg/mL in H2O)

pH

8.4-9.6 (20 °C, 1%)

General description

Sodium phosphate dibasic is a commonly used buffer in frozen formulations.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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Teddy J Zbacnik et al.
Journal of pharmaceutical sciences, 106(3), 713-733 (2016-11-30)
Buffers comprise an integral component of protein formulations. Not only do they function to regulate shifts in pH, they also can stabilize proteins by a variety of mechanisms. The ability of buffers to stabilize therapeutic proteins whether in liquid formulations

Articles

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