Sodium metabisulfite
SIAL/71932 - tested according to Ph. Eur.
Synonym: Natrii metabisulfis; Sodium disulfite; Sodium pyrosulfite
CAS Number: 7681-57-4
Empirical Formula (Hill Notation): Na2O5S2
Molecular Weight: 190.11
EC Number: 231-673-0
MDL Number: MFCD00167602
Linear Formula: Na2S2O5
Product Type: Chemical
| agency | tested according to Ph. Eur. |
| USP/NF | |
| assay | >97.5% |
| form | powder |
| InChI | 1S/2Na.H2O5S2/c;;1-6(2)7( |
| InChI key | HRZFUMHJMZEROT-UHFFFAOYSA |
| mp | >300 °C (lit.) |
| Quality Level | 100 ![]() |
| SMILES string | [Na+].[Na+].[O-]S(=O)S([O |
| Symbol | ![]() GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H302 - H318 |
| Precautionary statements | P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501 |
| Hazard Codes | Xn |
| Risk Statements | 22-31-41-52 |
| Safety Statements | 26-39-46 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Supplemental Hazard Statements | EUH031 |
| Purity | >97.5% |
| mp | >300 °C (lit.) |
| UNSPSC | 12352302 |



