S9763

Sodium phosphate dibasic

ACS reagent, ≥99.0%

• Synonym(s): sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
• Linear Formula: Na₂HPO₄
• CAS Number: 7558-79-4
• Molecular Weight: 141.96
• EC Number: 231-448-7
• MDL number: MFCD00003496
• UNSPSC Code: 12352302
• eCl@ss: 38070211
• PubChem Substance ID: 329824633
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• agency: suitable for SM 5210
• assay: ≥99.0%
• form: powder
• impurities: ≤0.002% Chloride (Cl); ≤0.01% Insoluble matter
• loss: ≤0.2% loss on drying, 105°C
• pH: 8.7-9.3 (25 °C, 5% in solution)
• pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• solubility: water: 5% at 25 °C, clear
• anion traces: sulfate (SO₄^2-): ≤0.005%
• cation traces: Fe: ≤0.002%; heavy metals: ≤0.001% (by ICP-OES)
• 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 in combination with sodium phosphate monobasic is used in the preparation of oral sodium phosphate solution (OSPS), which is a purgative used for bowel cleansing before colonoscopy.

Application

Sodium phosphate dibasic has been used in:

• the preparation of phosphate buffer saline solution for perfusion procedure
• western blot
• indirect enzyme linked immunosorbent assay

Other Notes

Go to Redi-Dri^™ Product Listing 795410

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable