1.06559

Sodium phosphate dibasic

anhydrous for analysis particle size about 0.2-1 mm (~18-80 mesh ASTM) EMSURE^®

• Synonym(s): Sodium phosphate dibasic, di-Sodium hydrogen phosphate anhydrous, 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: anhydrous
• Quality Level: 300
• product line: EMSURE^®
• assay: ≥99.0% (acidimetric)
• form: solid
• potency: >2000 mg/kg LD₅₀, oral (Rat)
• 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)
• solubility: 77 g/L
• bulk density: 880 kg/m³
• anion traces: chloride (Cl^-): ≤0.002%; sulfate (SO₄^2-): ≤0.005%
• cation traces: Fe: ≤0.001%; K: ≤0.01%; N: ≤0.001%; heavy metals (as Pb): ≤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

Analysis Note

Assay (acidimetric): ≥ 99.0 %
pH-value (5 %; water): 8.9 - 9.2
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.005 %
Total nitrogen (N): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.001 %
Fe (Iron): ≤ 0.001 %
K (Potassium): ≤ 0.01 %
Particle size (0.2 - 1 mm): about 90 %
Loss on Drying (105 °C): ≤ 0.2 %

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