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Merck
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Key Documents

239321

Sigma-Aldrich

Sodium sulfite

ACS reagent, ≥98.0%

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About This Item

Linear Formula:
Na2SO3
CAS Number:
Molecular Weight:
126.04
EC Number:
MDL number:
UNSPSC 코드:
12352302
PubChem Substance ID:
NACRES:
NA.21

Grade

ACS reagent

Agency

suitable for SM 5210

분석

≥98.0%

형태

powder or crystals

불순물

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

pH

9.0-10.5 (25 °C, 126 g/L)

solubility

water: soluble 126 g/L at 20 °C

음이온 미량물

chloride (Cl-): ≤0.02%

양이온 미량물

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

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일반 설명

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.

애플리케이션

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.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable


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