Sodium phosphate dibasic
SIGALD/71640 - puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)
Synonym: sec-Sodium phosphate; Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogenphosphate
CAS Number: 7558-79-4
Empirical Formula (Hill Notation): HNa2O4P
Molecular Weight: 141.96
EC Number: 231-448-7
MDL Number: MFCD00003496
Linear Formula: Na2HPO4
Product Type: Chemical
| anion traces | chloride (Cl-): ≤10 mg/kg |
| sulfate (SO42-): ≤50 mg/kg | |
| assay | ≥99.0% (T) |
| cation traces | Ca: ≤10 mg/kg |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤5 mg/kg | |
| heavy metals: ≤0.001% (by ICP-OES) | |
| K: ≤50 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| form | powder (or crystals) |
| grade | ACS reagent |
| puriss. p.a. | |
| impurities | ≤0.001% total nitrogen (N) |
| InChI | 1S/2Na.H3O4P/c;;1-5(2,3)4 |
| InChI key | BNIILDVGGAEEIG-UHFFFAOYSA |
| loss | ≤0.2% loss on drying, 105 °C |
| pH | 8.7-9.3 (25 °C, 50 mg/mL in H2O) |
| pKa (25 °C) | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
| Quality Level | 200  |
| SMILES string | [Na+].[Na+].[H]OP([O-])([ |
| Application: | Sodium phosphate dibasic can be used: • As an efficient and low-cost catalyst for the synthesis of 2-aminochrome by the reaction between aromatic aldehyde, malononitrile, and α- or β-naphthol under solvent-free conditions. • As a buffer in the synthesis of cyclic, acyclic enones and α, β-unsaturated aldehydes from trimethylsilyl enol ethers by using palladium as a catalyst and oxone as oxidant. • As an efficient catalyst in the synthesis of 3,4-dihydropyrano[3,2-c] chromenes from aldehydes, malononitrile and 4-hydroxycoumarin. • As a phosphorous precursor with the phosphoric acid in the synthesis of hydroxyapatite by precipitation method using anionic surfactant SDS (sodium dodefcyl sulfate). |
| General description: | Sodium phosphate dibasic is a sodium salt of phosphoric acid. It is highly hygroscopic and water-soluble compound used as a texturizer, emulsifier, and buffer. It can also be used as a reagent in water softeners, cleaners, and boiler treatments process. |
| General description: | Sodium phosphate is widely used buffer in molecular biology, biochemistry, and chromatographic studies. It exists in three forms: monobasic (NaH2PO4), dibasic (Na2HPO4), and tribasic (Na3PO4). Monobasic and dibasic forms in varying ratios are commonly used to compose the neutral sodium phosphate buffer solution. |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥99.0% (T) |
| UNSPSC | 12352300 |