SX0723

Sodium phosphate dibasic

anhydrous, HPLC, Meets ACS Specifications

• Synonym(s): Disodium Hydrogen Phosphate, Anhydrous, Disodium Hydrogen Phosphate, sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
• Linear Formula: Na₂HPO₄
• CAS Number: 7558-79-4
• Molecular Weight: 141.96
• MDL number: MFCD00003496
• UNSPSC Code: 12352302
• EC Index Number: 231-448-7

Properties

• Quality Level: 200
• Assay: ≥99.0%
• form: crystalline powder
• technique(s): HPLC: suitable
• impurities: ≤0.01% Insoluble matter
• loss: ≤0.2% loss on drying
• pH: 8.7-9.3 (20 °C, 10 g/L in H₂O)
• pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• mp: 250 °C (decomposition)
• solubility: 77 g/L
• anion traces: chloride (Cl^-): ≤0.002%; sulfate (SO₄^2-): ≤0.005%
• cation traces: Fe: ≤0.002%; heavy metals (as Pb): ≤0.001%
• UV absorption: λ: 280 nm A_max: ≤0.05
• shipped in: ambient
• storage temp.: room temp
• 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

Application

anhydrous, HPLC, Meets ACS Specifications

Analysis Note

Assay99.0% minChloride (Cl)0.002% maxFormWhite crystalline powderHeavy metals (as Pb)0.001% maxInsoluble matter0.01% maxIron (Fe)0.002% maxLoss on drying0.2% maxSulfate (SO4)0.005% maxUV Absorbance (1 M, water, 280 nm)0.05AU maxpH of a 5% solution at 25°C8.7-9.3

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable