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S7907

Sodium phosphate dibasic

Name: Sodium phosphate dibasic
Brand: SIAL

BioXtra, ≥99.0%

Synonym(s):

sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate

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About This Item

Linear Formula:

Na₂HPO₄

CAS Number:

7558-79-4

Molecular Weight:

141.96

PubChem Substance ID:

24899769

eCl@ss:

38070211

UNSPSC Code:

12161700

NACRES:

NA.25

EC Number:

231-448-7

MDL number:

MFCD00003496

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Properties

product line

BioXtra

Quality Level

200

assay

≥99.0%

form

powder or crystals

impurities

≤0.1% Insoluble matter

pH

8.0-11.0 (20 °C, 1 M in H₂O)

pKa (25 °C)

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

solubility

H₂O: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤0.05%, sulfate (SO₄^2-): ≤0.05%

cation traces

Al: ≤0.0005%, Ca: ≤0.002%, Cu: ≤0.0005%, Fe: ≤0.002%, K: ≤0.005%, Mg: ≤0.005%, NH₄⁺: ≤0.05%, Pb: ≤0.001%, Zn: ≤0.0005%

absorption

<0.05 at 260 in H₂O at 1 M, <0.05 at 280 in H₂O at 1 M

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

Description

General description

Sodium phosphate dibasic (NaH₂PO₄), also known as disodium phosphate, is a commonly used phosphate salt in biochemistry research due to its versatile properties. It is a key component in the preparation of phosphate buffer saline (PBS) and phosphate buffer, a commonly used buffer solution in many biological applications. In addition to its buffer properties, NaH₂PO₄ is also used as a precipitating agent to form silver orthophosphate (Ag₃PO₄) powders, making it a valuable tool in many laboratory settings. Disodium phosphate is also a widely used emulsifier in dairy products such as cheese and other foods.

Application

Sodium phosphate dibasic has been used:

as a component of phosphate buffered saline (PBS)
as a component of buffer for the preparation of cryopreservation diluent
in the preparation of McIlvaine buffer (citrate-phosphate buffer) for toluidine blue staining
in the preparation of the S9 mix for the Ames test, and SOS Chromotest
in the preparation of calcium deficient hydroxyapatite (CDHA) paste during the fabrication process of the CDHA scaffold

Features and Benefits

The BioXtra product line ensures high-quality products for consistent results.
High level of assay ( ≥99.0%), indicating its purity.
Powder form for easy handling and use.

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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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