Sodium hydrosulfite, also known as sodium dithionite, is a white crystalline powder that is commonly used in various industrial applications, including as a reducing agent and a bleaching agent.
In the textile industry, sodium hydrosulfite is used as a reducing agent to remove excess dye from fabrics and to bleach natural fibers, such as cotton and linen. It is also used as a bleaching agent in the production of pulp and paper, and in the food industry to bleach flour and other food products.
Sodium hydrosulfite is also used as a water treatment chemical to remove chlorine and other oxidizing agents from water, and in the production of various chemicals, including pharmaceuticals and plastics.
Sodium hydrosulfite is generally considered safe when used properly. However, it can be a skin and eye irritant, and proper protective equipment should be worn when handling the powder. It should also be stored in a dry, cool, and well-ventilated area.