Sodium metabisulfite
SIGALD/161519 - reagent grade, 97%
Synonym: 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
assay | 97% |
form | powder or crystals |
grade | reagent grade |
InChI | 1S/2Na.H2O5S2/c;;1-6(2)7( |
InChI key | HRZFUMHJMZEROT-UHFFFAOYSA |
mp | >300 °C (lit.) |
pH | 4.5 (20 °C, 50 g/L) |
Quality Level | 100 ![]() |
SMILES string | [Na+].[Na+].[O-]S(=O)S([O |
solubility | water: soluble 650 g/L at 20 °C |
Application: | Sodium metabisulfite may be used to initiate the cross-linking of polybutadiene by free radical polymerization. It may be used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine (6-OHDA) and 6-OHDA HBr in various studies. |
General description: | Sodium metabisulfite (MBS, Sodium disulfite) is the sodium salt of disulphurous (pyrosulfurous) acid. It is also commonly added to various food products and wines as a preservative. |
Packaging: | 2.5 kg in poly bottle |
Packaging: | 500 g in poly bottle |
Symbol | ![]() ![]() |
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% |
mp | >300 °C (lit.) |
UNSPSC | 12352300 |