| Identification | |
| Name: | Disulfurous acid,potassium salt (1:2) |
| Synonyms: | Disulfurousacid, dipotassium salt (9CI); Potassium pyrosulfite (6CI); Pyrosulfurous acid,dipotassium salt (8CI); Dipotassium disulfite; Dipotassium metabisulfite;Dipotassium pyrosulfite; E 224; Potassium disulfite (K2S2O5); Potassiummetabisulfite; Potassium metabisulfite (K2S2O5); Potassium pyrosulfite (K2S2O5) |
| CAS: | 4429-42-9 |
| EINECS: | 240-795-3 |
| Molecular Formula: | H2O5 S2 . 2 K |
| Molecular Weight: | 222.32 |
| InChI: | InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2 |
| Molecular Structure: |  |
| Properties | |
| Melting Point: | 190 °C |
| Flash Point: | °C |
| Boiling Point: | °Cat760mmHg |
| Density: | g/cm3 |
| Solubility: | Freely sol in water; insol in alc soluble in acids and alkaline |
| Flash Point: | °C |
| Color: | White crystals or crystalline powder White powder |
| Safety Data | |
| Hazard Symbols |
Xi: Irritant
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