Sodium pyrophosphate dibasic
SIGMA/71501 - BioUltra, ≥99.0% (T)
Synonym: Disodium dihydrogen pyrophosphate; Sodium diphosphate dibasic
CAS Number: 7758-16-9
Empirical Formula (Hill Notation): H2Na2O7P2
Molecular Weight: 221.94
EC Number: 231-835-0
MDL Number: MFCD00014246
Linear Formula: Na2H2P2O7
Product Type: Chemical
| λ | 1 M in H2O |
| anion traces | chloride (Cl-): ≤50 mg/kg |
| assay | ≥99.0% (T) |
| cation traces | Al: ≤5 mg/kg |
| As: ≤0.2 mg/kg | |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤50 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤10 mg/kg | |
| K: ≤300 mg/kg | |
| Li: ≤5 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Sr: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| form | powder |
| impurities | insoluble matter, passes filter test |
| InChI | 1S/2Na.H4O7P2/c;;1-8(2,3) |
| InChI key | GYQBBRRVRKFJRG-UHFFFAOYSA |
| loss | ≤0.5% loss on drying, 200 °C |
| pH | 3.5-4.5 (20 °C, 0.1 M in H2O, freshly prepared) |
| product line | BioUltra |
| Quality Level | 200  |
| SMILES string | [Na+].[Na+].OP([O-])(=O)O |
| solubility | H2O: 0.1 M at 20 °C, clear, colorless |
| UV absorption | λ: 260 nm Amax: 0.11 |
| λ: 280 nm Amax: 0.09 |
| Application: | Sodium pyrophosphate dibasic has been used: • as a setting retardant • as a component of STOP-washing buffer for in gel kinase assay • as protease and phosphatase inhibitor in the preparation of western blot lysis buffer |
| Symbol |  GHS07 |
| Signal word | Warning |
| Hazard statements | H319 |
| Precautionary statements | P305 + P351 + P338 |
| Hazard Codes | Xi |
| Risk Statements | 36 |
| Safety Statements | 26 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥99.0% (T) |
| UNSPSC | 12161700 |