1.06586

Sodium phosphate dibasic

anhydrous for analysis EMSURE^® ACS,Reag. Ph Eur

• Synonym(s): Sodium phosphate dibasic, di-Sodium 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
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• agency: reag. Ph. Eur.
• product line: EMSURE^®
• assay: ≥99.0% (alkalimetric)
• form: solid
• potency: >2000 mg/kg LD₅₀, oral (Rat)
• impurities: ≤0.01% Insoluble matter
• loss: ≤ 0.2% loss on drying, 105 °C
• 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)
• bulk density: 880 kg/m³
• anion traces: chloride (Cl^-): ≤0.002%; sulfate (SO₄^2-): ≤0.005%
• cation traces: Cu: ≤0.0003%; Fe: ≤0.001%; K: ≤0.01%; Pb: ≤0.001%; heavy metals: ≤0.001%
• storage temp.: 2-30°C
• 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

Linkage

Replaces: SX0720; SX0720-1; SX0720-5; SX0720-7; SX0720-20

Analysis Note

Assay (alkalimetric): ≥ 99.0 %
Insoluble matter: ≤ 0.01 %
pH-value (5 %; water, 25 °C): 8.7 - 9.3
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.005 %
Heavy metals (ACS): ≤ 0.001 %
Cu (Copper): ≤ 0.0003 %
Fe (Iron): ≤ 0.001 %
K (Potassium): ≤ 0.01 %
Pb (Lead): ≤ 0.001 %
Loss on Drying (105 °C): ≤ 0.2 %
Corresponds to ACS, Reag. Ph Eur

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

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