[Chemical Knowledge]：sodium bisulfite action

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Sodium bisulfite is a common chemical reagent, which is widely used in many fields. Its most common role is as a reducing agent, which can reduce a compound containing an aldehyde ketone functional group to the corresponding alcohol. In addition, sodium bisulfite can also be used as a preservative, disinfectant and bleaching agent.

as a reducing agent, the mechanism of action of sodium bisulfite is to reduce the compound by donating a pair of electrons. This pair of electrons comes from the sulfite ion (HSO3 −) in sodium bisulfite. In the reduction reaction of aldehyde ketone functional group, the sulfite ion is oxidized to sulfate ion (SO42-), and the aldehyde ketone functional group is reduced to the corresponding alcohol.

sodium bisulfite is very reductive, it is necessary to pay attention to safety. When using sodium bisulfite, avoid contact with skin and eyes, and keep it away from flammable and explosive materials. In addition, care must be taken not to inhale sodium bisulfite powder or fumes.

In addition to reducing agents, sodium bisulfite has other uses. For example, it can be used as a preservative for certain foods, drugs and cosmetics. Sodium bisulfite can also be used as a disinfectant, can be used in water treatment and beverage industry.

In addition, sodium bisulfite is also a bleaching agent that can be used to bleach textiles and paper. In this case, the role of sodium bisulfite is to reduce the dye or pigment molecules, so that it loses the pigment molecules, so as to achieve the effect of bleaching. However, it should be noted that the bleaching effect of sodium bisulfite is irreversible and easy to cause environmental pollution.

In short, sodium bisulfite is an important chemical reagent, which is widely used in chemistry, food, medicine, beverage and other fields. Although sodium bisulfite has many uses, it must be used in strict accordance with safety requirements to ensure people's safety and health.

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