| Product Name | Sodium metabisulfite |
| CAS No. | 7681-57-4 |
| Synonyms | Sodium pyrosulfite; disodium disulphite; Sodium metabisulphite; Sodium disulphite; Sodium pyrosulphite; SODIUM DISULFITE; disodium oxidosulfanesulfonate oxide; Sodium Metabi; Metabisulfite Sodium |
| InChI | InChI=1/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2 |
| Molecular Formula | Na2S2O5 |
| Molecular Weight | 190.1065 |
| Melting point | 150℃ |
| Water solubility | 540 g/L (20℃) |
| Hazard Symbols |  Xn:Harmful; |
| Risk Codes | R22:; R31:; R41:; |
| Safety | S26:; S39:; S46:; |
7681-57-4 sodium metabisulfite
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