Sodium sulfite of photo grade

Description: CC FEA 2832 10 0000

Anhydrous sodium sulfite (sodium sulphite) is derived from crystallization of concentrated sulfite liquor or from dehydrating of crystalline sodium sulfite.

In accordance with TC BY 400069905.031-2006 (as per GOST 5644-75) sodium sulfite is produced in two grades: photographic (first grade) and technical one.

 

Identified use:

• leather industry (for tanning);

• pharmaceutical industry (manufacture of synthetic odorants);

• chemical industry (in manufacture of iodine, chlorine, caustic soda, viscose rayon fiber, synthetic detergents and chemical crop protection agents);

• textile industry (cotton fabric dyeing);

• pulp-and-paper industry (for enhancement of pulp resilience);

• flotation of nonferrous metal ores, chromiferous effluents neutralization, makeup demineralizer.

 

Specifications

 

Characteristics

Unit

Standard

Higher grade

First grade

1

Appearance

 

White powder

2

Mass fraction of  sodium bisulphite (NaHSO3), min

%

97,5

96

3

Mass fraction of water-insoluble matter, max

%

0,01

0,02

4

Mass fraction of alkali as  (Na2CO3), max

%

0,08

0,4

5

Mass fraction of  thiosulfates, max

%

0,004

0,02

6

Mass fraction of  iron (Fe), max

%

0,003

0,005

7

Mass fraction of heavy metals (Pb), max

%

0,0005

0,002

8

Sodium sulphide presense 

 

Shall  stand the test per pt. 4.9