31454

Sodium sulfite

puriss. p.a., reag. Ph. Eur., anhydrous, 98-100.0% (iodometric)

• Linear Formula: Na₂SO₃
• CAS Number: 7757-83-7
• Molecular Weight: 126.04
• EC Number: 231-821-4
• MDL number: MFCD00003503
• UNSPSC Code: 12352302
• PubChem Substance ID: 329753771
• NACRES: NA.21

Properties

• Agency: USP/NF; reag. Ph. Eur.
• grade: puriss. p.a.
• Assay: 98-100.0% (iodometric)
• form: solid
• impurities: ≤0.001% heavy metals (as Pb); ≤0.02% thiosulfate (S₂O₃)
• pH: 9.0-10.5 (25 °C, 126 g/L)
• anion traces: chloride (Cl^-): ≤50 mg/kg
• cation traces: As: ≤0.2 mg/kg; Ca: ≤50 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; Pb: ≤5 mg/kg; Se: ≤10 mg/kg; Zn: ≤10 mg/kg
• SMILES string: [Na+].[Na+].[O-]S([O-])=O
• InChI: 1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
• InChI key: GEHJYWRUCIMESM-UHFFFAOYSA-L

Description

General description

Sodium sulfie is an inorganic sodium salt. Rapid-mixing method has been proposed to investigate kinetics of the reaction between oxygen and sodium sulfite.

Application

Sodium sulfite was used in the preparation of films based on wheat gluten.

Safety Information

• Supplementary Hazards: EUH031
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable