Potassium disulfate
SIGALD/60235 - puriss. p.a., ≥97.5% (T)
Synonym: Potassium pyrosulfate
CAS Number: 7790-62-7
Empirical Formula (Hill Notation): K2S2O7
Molecular Weight: 254.32
EC Number: 232-216-8
MDL Number: MFCD00011385
Linear Formula: K2S2O7
Product Type: Chemical
| anion traces | chloride (Cl-): ≤5 mg/kg |
| phosphate (PO43-): ≤10 mg/kg | |
| assay | ≥97.5% (T) |
| cation traces | Ag: ≤5 mg/kg |
| Al: ≤5 mg/kg | |
| As: ≤5 mg/kg | |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤10 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤5 mg/kg | |
| Li: ≤5 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Na: ≤50 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Sr: ≤5 mg/kg | |
| Tl: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| density | 2.28 g/mL at 25 °C (lit.) |
| form | powder or crystals |
| grade | puriss. p.a. |
| impurities | ≤0.002% total nitrogen (N) |
| InChI | 1S/2K.H2O7S2/c;;1-8(2,3)7 |
| InChI key | KAQHZJVQFBJKCK-UHFFFAOYSA |
| pH | 1-2 (25 °C, 25.5 g/L) |
| Quality Level | 200  |
| SMILES string | [K+].[K+].[O-]S(=O)(=O)OS |
| Application: | Potassium disulfite supported on silica may be used for the synthesis of ethyl pyruvate. |
| General description: | Potassium disulfite (Potassium pyrosulfate) has been synthesized from potassium hydrogen sulfate, via melting. |
| Other Notes: | Reagent for the decomposition of basic metal oxides by fusion |
| Symbol |   GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H314 - H330 |
| Precautionary statements | P260 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | C |
| Risk Statements | 34 |
| Safety Statements | 26-36/37/39-45 |
| RIDADR | UN 2923 6.1(8) / PGI |
| WGK Germany | WGK 3 |
| Purity | ≥97.5% (T) |
| Density | 2.28 g/mL at 25 °C (lit.) |
| UNSPSC | 12352302 |