08982

Natriummetabisulfit

analytical standard

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

Eigenschaften

• Qualität: analytical standard
• Qualitätsniveau: 100
• Assay: ≥98.0% (iodometric, RT)
• Haltbarkeit: limited shelf life, expiry date on the label
• mp (Schmelzpunkt): >300 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤50 mg/kg; thiosulfate (S₂O₃^2-): ≤500 mg/kg
• Kationenspuren: 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
• Anwendung(en): 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
• InChIKey: HRZFUMHJMZEROT-UHFFFAOYSA-L

Beschreibung

Allgemeine Beschreibung

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.

Anwendung

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.

Hinweis zur Analyse

metal trace analysis: corresponds to requirements

Sicherheitshinweise

• Piktogramme: GHS05,GHS07
• Signalwort: Danger
• H-Sätze: H302,H318
• P-Sätze: P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
• Gefahreneinstufungen: Acute Tox. 4 Oral - Eye Dam. 1
• Zusätzliche Gefahrenhinweise: EUH031
• Lagerklassenschlüssel: 13 - Non Combustible Solids
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable