sodium hydrosulfite

Product Description

Sodium hydrosulfite  (also known as sodium dithionite) is a white crystalline powder with a weak sulfurous odor. Although it is stable in the absence of air, it decomposes in hot water and in acid solutions.

With advanced technology, Guangdi Chemical company could produce sodium hydrosulfite with long-term stability, less impurity substance, and high concentration, thus offering customers unparalleled consistent dyeing quality, realiablity and efficiency with safer handling.

Food Industry

As a food additive, the edibility of Sodium Hydrosulfite is most concerned by customers. Our Food-grade Sodium Hydrosulfite is strictly conformed to the international standard. Meanwhile adjusting the flavor and color, our Sodium Hydrosulfite can let you customers enjoy the food without toxic concerns.

Pulp and Paper Industry

Sodium Hydrosulfite is widely identified as a better bleaching agent than Sodium Bisulfite in terms of improving paper whiteness. The concentration, dosage, pH, temperature, and time of bleach are the most important factors during the paper bleaching process. For minimizing damages to the equipment and meanwhile improving the paper whiteness, the Ph of our Sodium Hydrosulfite is strictly controlled at a certain ratio, which is favorable for your equipment self-life and improving your paper competitiveness in the market.

Textile Industry

A completely decolored fabric is the basis for the dyeing process. Highly effective bleaching agent improves the decolorization quality. This is the reason why we have dedicated to higher and higher quality Sodium Hydrosulfite for years. Hence, high stability and purity allow our users to increase profits by saving usage volume.

WE ARE COMMITTED TO RESTORING THE WORLD OF COLOR

Technical Parameters

Technical Parameters
Item
Technical Grade
Food Grade
90% Grade
88% Grade
85% Grade
Na2S2O4
≥90%
≥88%
≥85%
≥85%
Iron(Fe)
≤20ppm
≤20ppm
≤20ppm
≤20ppm
Zinc(Zn)
≤1ppm
≤1ppm
≤1ppm
≤1ppm
EDTA
/
/
/
Qualified
Arsenic
/
/
/
≤1ppm
Other heavy metal(as Pb)
/
/
/
≤1ppm
Formate
/
/
/
≤0.05%
Solution Appearance
Clear
Clear
Clear
Clear
Water Insolubles
≤0.05%
≤0.05%
≤0.05%
≤0.05%
Shelf Life(months)
12
12
12
12
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