In Industrial Fields

As a disinfectant. Sodium pyrosulfite has good sterilization and disinfection effects, and is widely used in medical, food processing and other fields.

As a bleach. Sodium metabisulfite can be combined with the chromophore in the dye to decolorize it, and it is used for bleaching in textile, paper, leather and other industries.

As a reducing agent. Sodium pyrosulfite can reduce metal ions such as silver and mercury, and is widely used in silver salt photography, electroplating and other fields.

As a medicine. The pharmaceutical industry is used for the purification of chloroform, phenylpropyl sulfone and benzaldehyde. Sodium metabisulfite can be used to treat skin diseases, digestive tract diseases, etc

In the rubber industry, it is used as a coagulant. In the printing and dyeing industry, it is used as a dechlorination agent for cotton cloth after bleaching, as a scouring aid for cotton cloth, and as a mordant for printing and dyeing. In the tanning industry, it is used for leather treatment, which can make the leather soft, plump, tough, waterproof, anti-folding, and wear-resistant. In the chemical industry, it is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc.

In Food Processing Industry

Bleaching is one of the most widely used applications of sodium metabisulfite

Anti-browning effect. Enzymatic browning often occurs in fruits and potatoes. Sodium pyrosulfite is a reducing agent, which has a strong inhibitory effect on the activity of polyphenol oxidase. In addition, it can consume the oxygen in the food tissue and play the role of deoxidation. Sulfurous acid can also perform an addition reaction with glucose to prevent the glucosamine reaction between glucose and amino acids in food, thus having the effect of preventing browning.

Antiseptic effect. Sulfurous acid can act as an acid preservative. Undissociated sulfurous acid is believed to inhibit yeast, mold, and bacteria.

The role of the loosening agent can be used as a component of the loosening agent.

Antioxidant effect. Sulfurous acid has a significant antioxidant effect. As sulfurous acid is a strong reducing agent, it can consume oxygen in fruit and vegetable tissues and inhibit the activity of oxidase, which is very effective in preventing the oxidative destruction of vitamin C in fruits and vegetables.