13459

Sodium metabisulfite

puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

• Sinónimos: Sodium disulfite, Sodium pyrosulfite
• Fórmula lineal: Na₂S₂O₅
• Número de CAS: 7681-57-4
• Peso molecular: 190.11
• Número CE: 231-673-0
• Número MDL: MFCD00167602
• Código UNSPSC: 12352302
• ID de la sustancia en PubChem: 329750183
• NACRES: NA.21
• Ensayo: 97-100.5%
• Formulario: powder or crystals

Propiedades

• grado: puriss.
• Nivel de calidad: 200
• Ensayo: 97-100.5%
• Formulario: powder or crystals
• calidad: dry; meets analytical specification of Ph. Eur., BP, NF, FCC, E223
• composición: SO₂, 65.0-67.4%
• impurezas: residue of solvents, complies; ≤0.02% thiosulfate (S₂O₃)
• pH: 3.5-5.0 (20 °C, 5%)
• mp: >300 °C (lit.)
• trazas de anión: chloride (Cl^-): ≤100 mg/kg
• trazas de catión: 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
• idoneidad: complies for appearance of solution
• cadena SMILES: [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
• Clave InChI: HRZFUMHJMZEROT-UHFFFAOYSA-L

Descripción

Descripción general

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.[1] It is commonly added to various foods and wines as preservative.[2]

Aplicación

Sodium metabisulfite was used to initiate the cross-linking of polybutadiene in the cores of the vesicle membranes by free radical polymerization in solution.[3] It has been used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine in various studies.[4][5]

Información de seguridad

• Pictogramas: GHS05,GHS07
• Palabra de señalización: Danger
• Frases de peligro: H302,H318
• Consejos de prudencia: P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
• Clasificaciones de peligro: Acute Tox. 4 Oral - Eye Dam. 1
• Riesgos supl.: EUH031
• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 1
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable