31448

Sodium metabisulfite

puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5%

• Sinónimos: Sodium disulfite, Sodium pyrosulfite
• Fórmula lineal: Na₂S₂O₅
• Número de CAS: 7681-57-4
• Peso molecular: 190.11
• EC Number: 231-673-0
• MDL number: MFCD00167602
• UNSPSC Code: 12352302
• PubChem Substance ID: 329753770
• NACRES: NB.24

Propiedades

• grade: ACS reagent; puriss. p.a.
• Quality Level: 200
• agency: reag. Ph. Eur.
• assay: 98-100.5%
• form: powder
• quality: dry
• impurities: ≤0.01% thiosulfate (S₂O₃)
• pH: 3.5-5.0 (20 °C, 5%)
• mp: >300 °C (lit.)
• anion traces: chloride (Cl^-): ≤50 mg/kg
• cation traces: As: ≤0.5 mg/kg; Ca: ≤50 mg/kg; Cd: ≤50 mg/kg; Co: ≤50 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤100 mg/kg; Ni: ≤50 mg/kg; Pb: ≤5 mg/kg; Zn: ≤10 mg/kg
• 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

Descripción

General description

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used in textile dyeing, photography and paper industry. It is also commonly added to various food products and wines as a preservative.

Application

Sodium metabisulfite may be used as an initiator during the cross-linking polymerization of polybutadiene in the cores of the vesicle membranes. It may be added as an antioxidant during the preparation of stock solutions of 6-hydroxydopamine in various studies.

Información de seguridad

• 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
• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable