Sodium Metabisulfite
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Sodium Metabisulfite
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Product: Sodium Metabisulfite
High Quality
Earliest Shipment
Competitive price
Professional Service
Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent.
Other names[hide]Sodium pyrosulfite Sodium disulfite | |
CAS number | 7681-57-4 Y |
PubChem | 24346 |
EC number | 231-673-0 |
RTECS number | UX8225000 |
Molecular formula | Na2S2O5, Na-O-(S=O)-O-(S=O)-O-Na |
Molar mass | 190.107 g/mol |
Appearance | white powder |
Density | 1.48 g/cm3 |
Melting point | >170 °C (begins at 150 °C) |
Solubility in water | 54 g/100 ml |
MSDS | Mallinckrodt MSDS |
EU Index | 016-063-00-2 |
EU classification | Harmful (Xn) Irritant (Xi) |
R-phrases | R22 R31 R41 |
S-phrases | (S2) S26 S39 S46 |
NFPA 704 | 020 |
Other anions | Sodium sulfite Sodium bisulfite |
Other cations | Potassium metabisulfite |
Related compounds | Sodium dithionite Sodium thiosulfate |