Complaint
Application:
In industry, sodium metabisulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium metabisulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of phenylpropanesulfone and benzaldehyde. The photographic industry is used as an ingredient for fixing agents. Perfume industry is used to produce vanillin. It is used as preservative in brewing industry, rubber coagulant and dechlorination agent after cotton bleaching. Organic intermediates, dyes and tanning are used as reducing agents, electroplating industry, wastewater treatment of oil fields and beneficiation agent of mines.
| Items | Index |
|---|---|
| Appearance | White Crystaline powder |
| Aspect of a solution 10% | Colorless Limpid Liquid |
| Purity (Na2S2O5) | Min 97% |
| Fe | Max 20~30ppm |
| As | Max 1ppm |
| Heavy metal (as Pb) | Max 5ppm |
