Description
Sodium meta-Bisulfite is toxic by inhalation. Strongly irritates skin and tissue. Noncombustible, but may decompose to emit toxic oxide fumes of sulfur and sodium when heated to high temperature. A corrosive acid when mixed with water. Used as a food preservative and as a laboratory reagent.
- Formula
- Na2S2O5
- Molar mass
- 190.095 g/mol
- CAS Number
- 7681-57-4
- Density
- 1.480 g/cm3
- Purity/Grade
- =>98% (ACS Reagent)
- Appearance
- Powder
- Water solubility
- 650 g/l at 20°C (68°F)
- Melting point/freezing point
- Melting point/range: >300°C (>572°F)
- pH
- 4.5 at 50 g/l at 20°C (68°F)
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