08982

Natriummetabisulfit

analytical standard

• Synonym(e): E223, Natriumdisulfit, Natriumpyrosulfit
• Lineare Formel: Na₂S₂O₅
• CAS-Nummer: 7681-57-4
• Molekulargewicht: 190.11
• E Number: E223
• PubChem Substance ID: 329748655
• UNSPSC Code: 85151701
• NACRES: NA.24
• EC Number: 231-673-0
• MDL number: MFCD00167602

Eigenschaften

• grade: analytical standard
• Quality Segment: 100
• assay: ≥98.0% (iodometric, RT)
• shelf life: limited shelf life, expiry date on the label
• mp: >300 °C (lit.)
• anion traces: chloride (Cl^-): ≤50 mg/kg, thiosulfate (S₂O₃^2-): ≤500 mg/kg
• cation traces: As: ≤0.5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤200 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg
• application(s): cleaning products; cosmetics; food and beverages; personal care
• format: neat
• SMILES string: [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O
• InChI: 1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
• InChI key: HRZFUMHJMZEROT-UHFFFAOYSA-L

Beschreibung

General description

Sodium metabisulfite is primarily used as an antioxidant and antimicrobial agent in a wide variety of foods and drugs. It is also used as the main additive in the prevention of melanosis in shrimp.

Application

Sodium metabisulfite may be used as an antioxidant which when added to anesthetic formulations serves to minimize epinephrine oxidation in the quantification of epinephrine in dental anesthetic solutions by capillary electrophoresis. Sodium metabisulfite may also be used as a standard in the determination of catecholamines in human plasma by high-performance liquid chromatography with electrochemical detection.

Analysis Note

metal trace analysis: corresponds to requirements

Sicherheitshinweise

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H302,H318
• pcodes: P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1
• supp_hazards: EUH031
• Lagerklasse: 13 - Non Combustible Solids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable