Sodium Phosphate Dibasic ≥99% ReagentPlus® Grade

Sodium Phosphate Dibasic, ReagentPlus® Grade, ≥99% - 100g

SKU: S0876-100G
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Sodium phosphate dibasic (Na₂HPO₄), ReagentPlus® grade, ≥99% purity, is a high-quality buffering salt widely used in biochemical, analytical, and cell culture applications.

This dibasic phosphate salt is commonly used in the preparation of phosphate buffer systems, pH adjustment solutions, and biological media formulations. Its consistent purity and defined pH performance support reproducible laboratory workflows in research and routine analysis.

Typical applications include:

Preparation of phosphate buffer solutions (PBS systems)

Biochemical and molecular biology workflows

Cell culture media preparation

Analytical method development

General laboratory reagent use

ReagentPlus® grade ensures dependable purity for research and regulated laboratory environments.

Chemical Name: Sodium phosphate dibasic
Synonyms: Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogen phosphate; sec-Sodium phosphate
CAS Number: 7558-79-4
Molecular Formula: Na₂HPO₄
Molecular Weight: 141.96 g/mol
Grade: ReagentPlus®
Assay: ≥99.0%
Form: Powder or crystals
Quality Level: 200
Primary Uses: Buffer preparation, PBS systems, biochemical reagents

SPECIFICATIONS

Sodium Phosphate Dibasic, ReagentPlus® Grade, ≥99%

Chemical Formula: Na₂HPO₄

CAS Number: 7558-79-4

Molecular Weight: 141.96 g/mol

Assay: ≥99.0%

Form: Powder or crystals

Product Line: ReagentPlus®

Quality Level: 200

Physical & Chemical Properties

pH: 8.9–9.2 (25 °C, 50 g/L in water)

Solubility: Water soluble, 100 mg/mL

pKa (phosphoric acid system):

pKa1: 2.15

pKa2: 6.82

pKa3: 12.38

Chemical Identifiers

EC Number: 231-448-7

PubChem Substance ID: 24899448

MDL Number: MFCD00003496

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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