Sodium sulfite solution with the chemical formula Na2SO3
It is primarily used in pulp and paper industry. It is used in water treatment as an oxygen scavenger agent, in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurising and as a dechlorinating agent and in leather trade for the sulfitisation of tanning extracts. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds. It is used in other applications including ore flotation, oil recovery, food preservative, making dyes, and detergent.
White, free flowing crystalline Odorless powder
SODIUM SULFITE
Test
Results
Colour
Yellow
Molecular Weight
126.05
Bulk Density
1.3 – 1.5 kg/dm3
Sodium Sulfite, wt %
99min
Sodium Sulfate, wt %
Max. 1
Moisture, %
0.05max
Insolubles, %
0.03max
Sodium Chloride, ppm
50max
Iron (Fe), ppm
3max
Heavy Metals, (Pb) ppm
10max
Selenium, ppm
2max
Arsenic, ppm
1max
PH of 5% Solution (@ 25° C)
9.5-10.6
Ca/Mg NH40H Inso. %
0.50max
Alk. as Na2C03 % w/w
0.15max
Water insolubles (other than Iron compounds) % by wt.
Max. 0.25
Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants
