Insurance powder is widely used in the textile industry of reducing dyeing, reduction cleaning, printing and decolorization and used as silk, wool, nylon and other fabric bleaching, because it does not contain heavy metals, after bleaching fabric bright color, not easy to fade. In terms of various substances, the insurance powder can also be used for food bleaching, such as gelatin, sucrose, honey, etc., soap, moving (plant) oil, bamboo, porcelain clay bleaching, etc.
Insurance powder can also be used in organic synthesis, such as dyes, pharmaceutical production as a reducing agent or bleaching agent, it is the most suitable for wood pulp paper bleaching agent. Moreover, many heavy metal ions such as Pb2 ,Bi3, etc. can be reduced to metal in water treatment and pollution control, and can also be used to preserve food and fruits.
However, due to the many dangers of insurance powder, many of its uses tend to be replaced by thiourea dioxide, which is safer and easier to store and transport.
1. Low sodium sulfite has stronger reducibility than general sulfite, and has the strongest reducibility and bleaching ability in sulfite bleach. China's regulations can be used for candied fruit, glucose, sugar, crystal sugar, maltose, candy, liquid glucose, dried fruits, dried vegetables, vermicelli, bamboo shoots, mushrooms and canned mushrooms, with a maximum usage of 0.40 g/kg.
Potato starch residues (SO2) ≤ 0.05gkg. Strong reducing agent, can reduce many metal salts into metal. Analysis of nitrogen fertilizer, ammonia and ammonium bicarbonate desulfurization solution. Polarographic development. Bleach.
2. Widely used in printing and dyeing industry, such as cotton fabric dyeing assistant and bleaching of silk wool fabric. Also used in medicine, mineral processing, copperplate printing. The paper industry is used as a bleaching agent. Food grade products are used as bleaching agents, preservatives and antioxidants.
3, light industry for soap, oil ester, pulp bleaching. Chemical industry for the manufacture of white powder, sodium thiosulfate, thiourea, thiobenzoic acid, six O six (medicine), synthetic dyes, also used in copperplate printing and analytical reagents.
4, printing and dyeing industry as a reducing agent, silk, wool bleach, but also used in the pharmaceutical industry, mineral processing, thiourea and its sulfide synthesis.
Insurance powder is a fine white powder, sometimes slightly yellow or gray. Has a special odor and strong reducibility. Insurance powder is much smaller than the damage to clothing and oxidants, so it is called insurance powder. It can be used for textiles of various fibers without causing harm.