Sodium hydrosulfite
Na2S2O4: 90% Min.
Fe: 20ppm Max.
Zinc: 1ppm Max.
Other heavy metal calculated as Pb: 1ppm Max.
Water Insoluble: 0.05% Max.
Shelf Life: 12 month
Application:
1. Used as reducer, dyes auxiliary of dyeing industry, synthetic dyes and intermediates.
2. Used as bleaching agent of paper pulp in paper-making industry.
3. Used as bleaching agent of china clay in the ceramics industry.
4. Used as deoxidizer of rubber and styrene butadiene rubber synthesis, developer in photo-taking industry.
5. Used as reducing agent, bleaching agent in the industries including pharmacy, food, metallurgy and leather.
Packaging: 50kg/drum or as customers request.