中文版 ENGLISH عربي
Yigyooly Chemicals Co., Ltd.
Yigyooly Chemicals Co., Ltd.
Products
Anhydrous sodium sulfite
Molecular formula Na2SO3
Molecular weight 126.04
Uses Mainly used in printing and dyeing, medicine, paper, chemical fiber, photographic, food, etc.
Features

white crystalline powder, Specific gravity 2.633.

Quality index

Technical indexes

High pure

Industrial grade

Photographic grade

sodium sulfite

Top grade

First grade

sodium sulfite

Na2SO3 ≥ %

98.0

97.0

96.0

97.0

Fe ≤ %

0.003

0.003

0.005

0.002

Water-insoluble matter ≤ %

0.01

0.02

0.03

0.05

Free alkali (Na2CO3 ) ≤ %

0.001

0.1

0.4

0.15

Sodium sulfate (Na2SO3) ≤ %

1.2

2.5

-

-

Sodium chloride (NaCl) ≤ %

0.003

0.1

-

-

Heavy metals (as Pb) ≤ %

0.001

-

-

0.002

Arsenic (As) ≤ %

0.0001

-

-

-

Sodium thiosulfate ≤%

0.001

-

-

0.0015

Appearance of Aq. solution

Qualified

-

-

Qualified

Reaction of Silver nitrate ammonia solution

Qualified

-

-

Qualified