| CAS Number | 7681-57-4 |
| Catalog Description | Sodium metabisulfite, ACS, 97.0% min. |
| Synonym | Sodium pyrosulfite |
| Synonym | Sodium disulfite |
| MDL Number | MFCD00167602 |
| Linear formula | Na2S2O5 |
| Master Molecular formula | Na2O5S2 |
| Melting point in C | >300° |
| Density | 1.48 |
| Merck Number | 14,8638 |
| Sensitivity | Air Sensitive |
| Sensitivity | Moisture Sensitive |
| Solubility | Soluble in water and acids |
| EC Number | 231-673-0 |
| Shipping | Non-hazardous for shipping |
| CAS Number | 7681-57-4 |
| Signal Word | Danger |
| Pictogram code 1 |
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| H Phrases | H318-H302 |
| P Phrases | P280-P264-P305+P351+P338-P310-P301+P312-P501A |
| TSCA | Yes |
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