1.06657

Sulfito de sodio

anhydrous for analysis EMSURE^® Reag. Ph Eur

• Sinónimos: Sulfito de sodio
• Fórmula lineal: Na₂SO₃
• Número de CAS: 7757-83-7
• Peso molecular: 126.04
• MDL number: MFCD00003503
• UNSPSC Code: 12352302
• EC Index Number: 231-821-4

Propiedades

• agency: reag. Ph. Eur.
• Quality Level: 300
• product line: EMSURE^®
• assay: 97.0-100.5% (iodometric)
• form: powder
• potency: 2610 mg/kg LD₅₀, oral (Rat)
• impurities: ≤0.005% Insoluble matter; ≤0.03 meq/g Titrable free base
• pH: 8.8-10 (20 °C, 50 g/L in H₂O)
• mp: >500 °C (decomposition)
• density: 2.63 g/cm³ at 20 °C
• bulk density: 1480 kg/m³
• anion traces: chloride (Cl^-): ≤0.02%; thiosulfate (S₂O₃^2-): ≤0.1%
• cation traces: As: ≤0.0001%; Cu: ≤0.0005%; Fe: ≤0.001%; Pb: ≤0.0005%; Se: ≤0.0004%; Zn: ≤0.001%; heavy metals (as Pb): ≤0.0005%
• storage temp.: 2-30°C
• 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

Descripción

Application

• Structural Properties and Hydrolysability of Paulownia elongate: The Effects of Pretreatment Methods Based on Acetic Acid and Its Combination with Sodium Sulfite or Sodium Sulfite: This study investigates how acetic acid and sodium sulfite pretreatments affect the structural properties and enzymatic hydrolysis of fast-growing Paulownia elongate. The combination significantly improved cellulose content and enzymatic digestibility, demonstrating potential for efficient sugar production (Wang et al., 2022).
• Effects of oxygen scavengers (Sodium sulfite, sodium bisulfite, sodium dithionite, and sodium metabisulfite) on growth and accumulation of biomass in the green alga Asterarcys quadricellulare: This research explores the impact of various oxygen scavengers on the biomass growth of the green alga Asterarcys quadricellulare. Sodium sulfite was one of the compounds tested for enhancing biomass accumulation (Sudha et al., 2022).
• A novel photo-assisted activated persulfate strategy for selective oxidation of ammonia nitrogen to dinitrogen using sodium silicate and sodium sulfite as regulators: This paper presents a new strategy for the selective oxidation of ammonia nitrogen to dinitrogen. Sodium sulfite was used as a regulator to enhance the efficiency of the process (Zhang et al., 2024).
• Effectiveness of sodium sulfite as an electron acceptor for bioenhanced treatment of salt-containing water produced from ASP flooding: This study examines the role of sodium sulfite as an electron acceptor in the bioenhanced treatment of saline water from alkaline-surfactant-polymer flooding. The findings suggest improved treatment efficiency with sodium sulfite addition (Zhang et al., 2021).

Analysis Note

Valoración (yodométrica): 97,0 - 100,5 %
Identidad: pasa la prueba
Aspecto de la disolución: pasa la prueba
Materia insoluble: ≤ 0,005 %
Sin ácido: pasa la prueba
Sin base valorable: ≤ 0,03 meq/g
Cloruros (Cl): ≤ 0,02 %
Tiosulfatos (S₂O₃): ≤ 0,1 %
Metales pesados (como Pb): ≤ 0,0005 %
As (Arsénico): ≤ 0,0001 %
Cu (Cobre): ≤ 0,0005 %
Fe (Hierro): ≤ 0,001 %
Pb (plomo): ≤ 0,0005 %
Se (Selenio): ≤ 0,0004 %
Zn (Cinc): ≤ 0,001 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Información de seguridad

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