Sodium phosphate dibasic - 04276
Code: 04276
Sodium phosphate dibasic
Puriss., meets analytical specification of BP, Ph. Eur., USP, FCC, E 339, anhydrous, 98-100.5% (calc. to the dried substance)
sec-Sodium phosphate; Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogenphosphate
98-100.5%, meets analytical specification of Ph. Eur., BP, USP, FCC, E 339, anhydrous, 98-100.5% (calc. to the dried substance)
CAS Number: 7558-79-4
Linear Formula: Na2HPO4
Molar Mass: 141.96 g/mol
EC Number: 231-448-7
MDL Number: MFCD00003496
| Property |
Value |
| Assay (calculated to the dried substance) |
98.0 - 100.5 % |
| Assay of NaH2PO4 (calculated to dried substances) |
max. 1.0 % |
| Loss on drying (105°C, 4 h) |
max. 1.0 % |
| Loss on drying (130°C) |
max. 1.0 % |
| PH (1 %,20°C) |
8.4 - 9.6 |
| Ammonium (NH4) |
max. 0.002 % |
| Arsenic (As) |
max. 1 ppm |
| Cadmium (Cd) |
max. 1 ppm |
| Copper (Cu) |
max. 0.001 % |
| Iron (Fe) |
max. 20 ppm |
| Mercury (Hg) |
max. 1 ppm |
| Lead (Pb) |
max. 1 ppm |
| Zinc (Zn) |
max. 0.001 % |
| Heavy metals (as Pb) |
max. 10 ppm |
| Chloride (Cl) |
max. 50 ppm |
| Fluoride (F) |
max. 10 ppm |
| Pyrophosphate (as Na4P2O7) |
max. 2.0 % |
| Sulfate (SO4) |
max. 200 ppm |
| Water insoluble matter |
max. 0.2 % |
| Appearance of the solution |
complying |
| Reducing impurities |
complying |
| Residual solvents |
complying |
| Turbidity |
max. 3.5 NTU |
| Property |
Value |
| PKa (25 °C) |
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
