| send us an inquiry |
| LC4938 Potassium disulfite for analysis EMSURE |
| Order number | Packaging | Quantity | Price € |
| AC31938 | Plastic bottle | 500 g | 15.03 |
| AC31938 | Plastic bottle | 1 kg | 25.65 |
| AC31938 | Plastic bottle | 2.5 kg | 54.45 |
| Product information | |
| Synonyms | Potassium metabisulfite, Potassium pyrosulfite |
| Hill Formula | K2O5S2 |
| Chemical formula | K2S2O5 |
| HS Code | 2832 20 00 |
| EC number | 240-795-3 |
| Molar mass | 222.33 g/mol |
| CAS number | 16731-55-8 |
| Chemical and physical data | |
| Solubility | 450 g/l (20 °C) |
| Melting point | 150 °C (decomposition) |
| Molar mass | 222.33 g/mol |
| Density | 2.34 g/cm3 |
| Bulk density | 1000 – 1300 kg/m3 |
| pH value | 3.0 – 4.5 (50 g/l, H2O, 20 °C) |
| Safety information | |
| R Phrase | R 31-37-41 Contact with acids liberates toxic gas.Irritating to respiratory system.Risk of serious damage to eyes. |
| S Phrase | S 26-39 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection. |
| Categories of danger | irritant |
| Hazard Symbol |  Irritant |
| Storage class | 10 – 13 Other liquids and solids |
| WGK | WGK 1 slightly water endangering |
| Disposal | 6 Sulfides and sulfites as well as other reducing substances, inorganic cyanides and isonitriles: Stir into sodium hypochlorite solution (Cat. No. 105614) and, if necessary, leave to react for several days. Caution: some substances may show a violent reaction! Draw off any toxic or flammable gases that may be formed. Excess oxidant should be neutralized with sodium thiosulfate (Cat. No. 106513). Container D or E. |
| Toxicological data | |
| LD 50 oral | LD50 rat 2300 mg/kg |
| Specifications | |
| Assay (iodometric) | ≥ 96 % |
| In water insoluble matter | ≤ 0.005 % |
| Chloride (Cl) | ≤ 0.005 % |
| As (Arsenic) | ≤ 0.0001 % |
| Cu (Copper) | ≤ 0.001 % |
| Fe (Iron) | ≤ 0.0005 % |
| Pb (Lead) | ≤ 0.001 % |
| Zn (Zinc) | ≤ 0.001 % |