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Key Documents

1.06657

Supelco

Sodium sulfite

anhydrous for analysis EMSURE® Reag. Ph Eur

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About This Item

Linear Formula:
Na2SO3
CAS Number:
Molecular Weight:
126.04
MDL number:
UNSPSC Code:
12352302
EC Index Number:
231-821-4
NACRES:
NA.21

agency

reag. Ph. Eur.

Quality Level

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 (S2O32-): ≤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

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Related Categories

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

Assay (iodometric): 97.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.005 %
Free acid: passes test
Titrable free base: ≤ 0.03 meq/g
Chloride (Cl): ≤ 0.02 %
Thiosulfate (S₂O₃): ≤ 0.1 %
Heavy metals (as Pb): ≤ 0.0005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.0005 %
Fe (Iron): ≤ 0.001 %
Pb (Lead): ≤ 0.0005 %
Se (Selenium): ≤ 0.0004 %
Zn (Zinc): ≤ 0.001 %

Legal Information

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

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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Protocols

Preparation of a standard solution for Sulfite

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