亚硫酸钠，Sodium sulfite；ACS reagent, ≥98.0%

图片 亚硫酸钠，Sodium sulfite；ACS reagent, ≥98.0%
线性分子式: Na2SO3 CAS号: 7757-83-7 分子量: 126.04 EC 号: 231-821-4 MDL编号: MFCD00003503 PubChem化学物质编号: 329752528 NACRES: NA.21
制造商品牌: 西格玛 Sigma-Aldrich
货号（SKU）: 239321
CAS号: 7757-83-7
MDL号: MFCD00003503
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说明

亚硫酸钠是一种水溶性无机盐，通常用作还原剂。它还用于磺化和磺甲基化反应。此外，它在纺织工业中用作漂白、脱硫和脱氯剂。作为氧气和游离氯清除剂，Na2SO3用于水处理过程。亚硫酸钠通过与醛和酮形成加合物参与醛和酮的纯化和分离。其他用途包括生产硫代硫酸钠、洗涤剂和染料。

一般描述

Sodium sulfite is a water-soluble inorganic salt that is commonly used as a reducing agent. It is also used for sulfonation and sulfomethylation reactions. Additionally, it is used in the textile industry as a bleaching, de-sulfurizing, and dechlorinating agent. As an oxygen and free chlorine scavenger, Na2SO3 is employed in the water treatment process. Sodium sulfite participates in the purification and isolation of aldehydes and ketones by forming adducts with them. Other uses include the production of sodium thiosulfate, detergents, and dyes.
 

应用

Sodium sulfite can be used:
  • As a reducing agent in the hydroxylation of arylboronic acids and arylboronic esters into corresponding phenols.
  • In the transformation of α-amino alcohol methanesulfonate hydrochlorides to sodium α-amino alkanesulfonates.
  • As a SO2 precursor in the multigram synthesis of DABCO·(SO2)2 abbreviated as DABSO.

 

属性

等级

ACS reagent

质量水平

200

测定

≥98.0%

形式

powder or crystals

杂质

Free acid, passes test
≤0.005% insolubles
≤0.03 meq/g Titr. free base

pH值（酸碱度）

9.0-10.5 (25 °C, 126 g/L)

溶解性

water: soluble 126 g/L at 20 °C

痕量阴离子

chloride (Cl-): ≤0.02%

痕量阳离子

Fe: ≤0.001%
heavy metals (as Pb): ≤0.001%

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

 

安全信息

储存分类代码

13 - Non Combustible Solids

WGK

WGK 1

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