Sodium Hydrosulfite is a white, crystalline, water-soluble powder, with a formula Na2S2O4. It used as a reducing agent, especially in dyeing, and as a bleach. this product is a very effective reducing agent. It also knows as Sodium Dithionite had been developed at the beginning of the 20th century and was first applied for textile printing. Due to structural change in the textile industry, the importance of the application for the bleaching of wood pulp in the paper industry increased continuously.
chemical and physical properties of Sodium hydrosulfite
In the table below some of the chemical and physical properties of this product are mentioned. all data that is mentioned in this table is gathered from Wikipedia website:
Applications of Sodium hydrosulfite
this material is commonly used in the pulp and paper industry for bleaching brightening and de-colorization of virgin and recycled fiber. It is also applied extensively to brighten Kaolin clay. In textiles, the primary usage is in processing vat dyes and indigo dyes. Other applications include water treatment, leather processing and food bleaching (sugar, honey, and gelatin).
Some industries that commonly rely on this product in the manufacture of their products include:
- Textiles as a reducing agent for color
- Pulp and paper as an additive and reducing agent
- Foods and beverages
- Chemical processing
- Water treatment – for controlling iron flash on white fabrics in bleaching environments
- Gas purification
- Environmental remediation
Sodium hydrosulfite packaging
packing of chemicals is one of the most important factors in the transportation segment. below, there is a Shanghai Chemex group project for sodium hydrosulfite in China. the common packing for this chemical is as you can see below: