Sodium Sulfite Heptahydrate

CAS

10102-15-5

Catalog Number

ACM10102155

Category

Main Products

Molecular Weight

252.15

Molecular Formula

H14Na2O10S

MSDS COA Spec Sheet

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Specification

Synonyms

Sulfurous acid disodium·7hydrate

Appearance

solid

Application of Sodium Sulfite Heptahydrate as Electrolyte in Electrochemical Research

Altowyan, Abeer S., et al. Nanomaterials, 2022, 12(19), 3272.

Sodium sulfite heptahydrate (Na2SO3·7H2O) can be used as an electrolyte in electrochemical cells, providing a source of sodium ions (Na+) and sulfite ions to participate in the electrochemical reactions that occur in the battery. For example, in the study of the electrochemical performance of iridium oxide (IrOx) thin films, 0.5M sodium sulfite heptahydrate was used as the electrolyte to explore the reactivity of the hydrogen production catalyst.
Evaluation of photocatalytic performance in sodium sulfite heptahydrate electrolyte
· Firstly, IrOx thin films were prepared by spin casting as photoelectrochemical (PEC) hydrogen production catalysts.
· Subsequent photocatalytic activity measurements were performed using the nanocomposite electrode in 100 mL of 0.5 M (Na2SO3·7H2O) solution at room temperature by an OrigaFlex potentiostat.
· A surface area of 1cm2 is used as the photocathode (working electrode), and a Pt electrode with the same area as the counter electrode (auxiliary electrode). Simulate sunlight incident on the electrode surface, and standard white illumination is provided by a mercury-xenon light source.

Sodium Sulfite Heptahydrate Used in the Synthesis of Pyrazole -3-One Derivatives

Datar P A, et al. International Journal of Medicinal Chemistry, 2015, 2015.

Pyrazole-3-one compounds are designed as hypoglycemic drug candidates with antidiabetic activity. Pyrazole-3-one compounds can be obtained from different compound precursors, depending on their R group. In the synthesis process of substituted phenylhydrazine from substituted aniline, sodium sulfite solution is one of the important reaction conditions.
Reaction involved in sodium sulfite heptahydrate
· 5 g (0.037 mol) of substituted amino compound was dissolved in a mixture of 10.5 mL of concentrated HCl and an equal volume of water, cooled rapidly to 0 °C in order to obtain the hydrochloride of the base in a fine state of division.
· Gradual addition of a solution of 2.6 g (0.037 mol) of sodium nitrite in 6 mL of water was performed for diazotization. Stirring was continued for a few minutes, and the solution was filtered and added by using a separatory funnel to an ice-cold solution made of 41 g (0.156 mol) of sodium sulphite (96% Na2SO3·7H2O) in 100 mL of water containing 4 g of NaOH.
· After the solution was acidified, heated in a water bath, filtered and recrystallized, yellow needles were obtained. The precipitate was filtered off and dissolved in water and the solution was treated with a concentrated solution of sodium acetate. The free base separated out in an almost pure state.

Sodium sulfite heptahydrate participates in the improvement of the pararosaniline method

Structure of sodium sulfite heptahydrate

Kuijpers, Arnold TJM, and Jos Neele. Analytical Chemistry 55.2 (1983): 390-391.

The selectivity and sensitivity of the pararosaniline method make it a method for determining the formaldehyde content in dilute aqueous solutions or in the atmosphere. However, when carried out in the usual way, the method has a significant disadvantage that a toxic tetrachloromercuric (TCM) solution must be used to stabilize the sulfite reagent. Recently, there has appeared in the literature about an improved pararosaniline method. Free of mercuric ions, it is used to determine sulfur dioxide and formaldehyde in the air. When determining sulfur dioxide in the atmosphere, formaldehyde is used to stabilize the sample solution. However, when determining formaldehyde, no stabilizer is added to the sulfite solution made with sodium sulfite heptahydrate. This communication describes a study of the stability of the sulfite reagent in the pararosaniline method.
When selecting the concentrations of the various components of the reagent, it should be ensured that the final concentrations in the solution used for the measurement are always consistent with the literature. The tetrachloromercuric-sulfite solution was prepared by dissolving 100 mg of sodium sulfite in 100 mL of TCM solution. The TCM solution consisted of 5.8 g of sodium chloride and 13.6 g of mercuric chloride dissolved in 1 liter of water. The pararosaniline solution consists of 160 mg pararosaniline dissolved in 100 mL 2.88 M hydrochloric acid solution; this reagent can be stored for several months. The sulfite solution consists of 200 mg sodium sulfite heptahydrate (Na2S3·7H2O) dissolved in 100 mL water. The combined TCMS-pararosaniline reagent is prepared by mixing equal volumes of TCMS solution and P solution. The sulfite-pararosaniline solution, the combined reagent without mercuric ions, consists of 200 mg sodium sulfite heptahydrate and 160 mg pararosaniline dissolved in 200 mL 1.44 M hydrochloric acid solution. The standard formaldehyde solution is always freshly prepared from a 37 wt% formaldehyde solution in a 0.005 M hydrochloric acid solution.

Sodium Sulfite Heptahydrate Involved in Enzymatic Ring-Opening Polymerization of β-Lactams

Schwab, Leendert W., et al. Macromolecular rapid communications 29.10 (2008): 794-797.

The synthesis of poly(b-alanine) by ring-opening of 2-azetidinone (the synthesis of 2-azetidinone involved Sodium Sulfite Heptahydrate) catalyzed by immobilized Candida antarctica lipase B as novozyme 435 is reported. The maximum chain length obtained was 18 monomer units. After removing cyclic byproducts and low molecular weight species, pure linear poly(b-alanine) was obtained. The formation of the polymer was confirmed by 1H NMR spectroscopy and MALDI-TOF mass spectrometry. The enzyme remained active under the above reaction conditions. b-Alanine was formed during the reaction, but could not be polymerized by the enzyme. Water was present in the enzyme and was required for polymerization, but could not initiate polymerization. The results also showed that the purification method was successful, as neither β-alanine nor cyclic oligoamides were observed in the product.
Vinyl acetate (100 mL, 1.08 mol) was cooled using an acetone/liquid mixture and chlorosulfonyl isocyanate (17.4 mL, 0.2 mol) was added thereto while maintaining the temperature between 20 and 25 ° C. After the addition of the isocyanate, the mixture was stirred for 20 minutes and then rapidly cooled to 20 ± 8 ° C. The resulting reddish-brown chlorosulfonyl-b-lactam (I) solution was added dropwise to a mixture of water (20 mL), ice (90 g), sodium bicarbonate (47 g) and sodium sulfite heptahydrate (33 g) and stirred vigorously. The color of the reaction mixture turned yellow. The reaction mixture was stirred for 15 minutes until no more gas was released. After filtration, the vinyl acetate phase was separated, dried over Na2SO4 and NaHCO3, and filtered again. The residual vinyl acetate was removed by rotary evaporation at 40 ± 8 ° C. The aqueous phase was extracted five times with cold (15 ± 8 ° C) dichloromethane. The dichloromethane solution was added to the residue of the organic phase. The solvent was removed by rotary evaporation to give 4-acetoxy-2-azetidinone (II) as a dark yellow oil in a yield (40% by weight).

July 11, 2024

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What is the molecular formula of Sodium Sulfite Heptahydrate?

The molecular formula of Sodium Sulfite Heptahydrate is H14Na2O10S.

What is the molecular weight of Sodium Sulfite Heptahydrate?

The molecular weight of Sodium Sulfite Heptahydrate is 252.15 g/mol.

What are the synonyms of Sodium Sulfite Heptahydrate?

The synonyms of Sodium Sulfite Heptahydrate are disodium;sulfite;heptahydrate, sodium sulphite heptahydrate, and 4YS288TJUI.

What is the IUPAC name of Sodium Sulfite Heptahydrate?

The IUPAC name of Sodium Sulfite Heptahydrate is disodium;sulfite;heptahydrate.

What is the InChI of Sodium Sulfite Heptahydrate?

The InChI of Sodium Sulfite Heptahydrate is InChI=1S/2Na.H2O3S.7H2O/c;;1-4(2)3;;;;;;;/h;;(H2,1,2,3);7*1H2/q2*+1;;;;;;;;/p-2.

What is the InChIKey of Sodium Sulfite Heptahydrate?

The InChIKey of Sodium Sulfite Heptahydrate is WMJRPJZQQSSDBU-UHFFFAOYSA-L.