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anhydours sodium sulphite
anhydours sodium sulphite

Name:  Industry Grade Price Anhydrous Sodium Sulfite Na2so3      

Physical and chemical properties
White crystalline or powder form; triangular prism crystal shape; alkaline water solution with pH at 9 C 9.5; The highest water solubility is about 28% with temperature at 33.4C. When exposed to air, it is oxidized to form sodium sulfate. When heated to high temperature, it decomposes to form sodium sulfide; Density: 2.633(15.4C), Refractive Index: 1.565; Molecular Weight: 126.04.   

 

Item

Value

Top-grade

First grade

sodium sulfite(Na2SO3)%

98

97

Fe,%

0.003

0.003

water-Insoluble%

0.01

0.02

Free alkali(as Na2CO3),%

0.001

0.1

Sulfate(as Na2SO4),%

1.2

2.5

Chloride(as NaCl),%

0.003

0.1

Application: 
It is used in dyeing industry as deoxidizer and bleaching agent for a variety of cotton fabric treating and scouring, which can prevent fabrics from local oxidation and deterioration of fibre s

 

trength. In photographic industry it is used as a reagent. In organic industry it is used as reducing agent in production of m-phenylenediamine, 25 - bared oxazolone, amino salicylic acid, etc. Textile industry uses it as a stabilizer for synthetic fibre. Other applications include various uses in paper mills, electronic industry, water treatment, etc.

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