The role of bleaching block in food

As people's health awareness continues to improve, food safety is currently an issue that everyone is concerned about. Many foods we come into contact with in our lives have various chemicals added to them, some of which are harmless to the human body, while others have a very serious impact on the body. Bailua has been used extensively before, and many problems have arisen because of its special function. So, what is the role of bleaching powder in food?

Whitening powder is also known as bleaching powder . Its chemical name is sodium formaldehyde sulfoxylate dihydrate or sodium formaldehyde sulfoxylate dihydrate. It is translucent white crystals or small pieces and is easily soluble in water. It has strong reducing properties at high temperatures and has a bleaching effect. It decomposes when it comes into contact with acid to produce sodium salt and chlorinated acid. It decomposes at 120°C to produce toxic gases such as formaldehyde, sulfur dioxide and hydrogen sulfide. The aqueous solution of bleaching powder begins to decompose harmful substances at above 60°C. In the printing and dyeing industry, bleaching agent is used as a discharge agent and reducing agent to produce indigo dyes, vat dyes, etc.

Why is bleaching powder added to food?

Some lawbreakers mix bleaching powder into foods such as bean curd sheets, vermicelli, flour, bamboo shoots, etc., mainly to whiten them, preserve freshness, increase taste and prevent spoilage. Using bleaching blocks can mask the spoiled appearance of inferior food.

What are the hazards of hanging white block

The toxicity of bleaching powder is related to the formaldehyde produced when it decomposes. Formaldehyde easily reacts with receptors of various chemical structures in the body. For example, it can undergo condensation with amino compounds and add with sulfhydryl compounds to denature proteins. Formaldehyde can also be reduced to alcohol in the body, so it can exhibit the toxic effects of methanol. Harmful to the human body.

First aid treatment for Diaobaikuai poisoning : 1. Gastric lavage with 15% acetamide and then with warm water. If you accidentally ingest poisonous food, you should wash your stomach and induce laxatives before symptoms appear. ⒉ After gastric lavage, inject the general antidote medicinal charcoal, tannic acid, magnesium oxide, or raw licorice and mung bean soup with medicinal charcoal liquid. ⒊ Catharsis with 40-60 ml of 50% sodium sulfate; or high colon lavage with normal saline. ⒋ Drink appropriate amount of fluid. ⒌ For patients with oliguria, give furosemide (furosemide) as a diuretic. ⒍ Liver protection treatment includes glucuronolactone (glucuronolide) and vitamin C. ⒎ Give effective cough suppressants. ⒏ Treat symptomatically.