Sodium metabisulfite
SIGALD/13459 - puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
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
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 13459-500G-R
This image depicts SKU: 13459-500G-R
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 13459-1KG-R
This image depicts SKU: 13459-1KG-R
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 13459-5KG-R
This image depicts SKU: 13459-5KG-R
| anion traces | chloride (Cl-): ≤100 mg/kg |
| assay | 65.0-67.4% SO2 basis |
| 97-100.5% | |
| cation traces | As: ≤2 mg/kg |
| Cu: ≤10 mg/kg | |
| Fe: ≤10 mg/kg | |
| Hg: ≤1 mg/kg | |
| Pb: ≤2 mg/kg | |
| Se: ≤5 mg/kg | |
| Zn: ≤10 mg/kg | |
| form | powder or crystals |
| grade | puriss. |
| impurities | residue of solvents, complies |
| ≤0.02% thiosulfate (S2O3) | |
| InChI | 1S/2Na.H2O5S2/c;;1-6(2)7( |
| InChI key | HRZFUMHJMZEROT-UHFFFAOYSA |
| mp | >300 °C (lit.) |
| pH | 3.5-5.0 (20 °C, 5%) |
| quality | dry |
| meets analytical specification of Ph. Eur., BP, NF, FCC, E223 | |
| Quality Level | 200  |
| SMILES string | [Na+].[Na+].[O-]S(=O)S([O |
| suitability | complies for appearance of solution |
| Application: | Sodium metabisulfite was used to initiate the cross-linking of polybutadiene in the cores of the vesicle membranes by free radical polymerization in solution. It has been used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine in various studies. |
| General description: | Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used as reducing agent in textile and photography industry. It is commonly added to various foods and wines as preservative. |
| 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 | 65.0-67.4% SO2 basis; 97-100.5% |
| mp | >300 °C (lit.) |
| UNSPSC | 12352300 |