Is it serious if you eat food with sodium metabisulfite

Is it serious to eat foods added with sodium metabisulfite? The thing is this: I bought rice cake for the first time, and after a long time of cooking, I sautéed, and suddenly smelled a very pungent smell, so I looked at the packaging, only the additive sodium metabisulfite, the taste is not bad, but there is a shadow in my heart, always I feel an unpleasant smell, so I asked for help to confirm "Is the food with sodium metabisulfite added serious consequences?"

       In fact, sodium metabisulfite is also a food additive, acting as a preservative, bleach, and bulking agent. my country's "Sanitary Standards for the Use of Food Additives" stipulates that it can be used in candied fruits, bamboo shoots, mushrooms, canned mushrooms, biscuits, liquid glucose, glucose, sugar, rock sugar and vermicelli.

       In candied fruit, bamboo shoots, mushrooms and canned mushrooms, the residual amount of glucose should be less than 0.05g/kg; the residual amount of biscuits, sugar, vermicelli and other varieties should be less than 0.1g/kg; the residual amount of liquid glucose should not exceed 0.2g/kg; The amount used must not exceed 0.45g/kg.

       If excessive sodium metabisulfite is consumed, it will cause great harm to the human body, threaten the health of the human body, and cause the human body to be unable to absorb calcium. The main adverse reactions are caused by diarrhea, bronchial asthma; when the consumption exceeds the standard, it will poison the liver and kidneys of the human body, and the consequences will be unimaginable and will lead to cancer.

Sodium metabisulfite is white or yellow crystalline powder or small crystals with a strong odor of SO2. It is soluble in water, and the aqueous solution is acidic. When contacted with strong acid, it emits SO2 to form the corresponding salts. Therefore, the product cannot last for a long time. In general, sodium metabisulfite is commonly used in:

　　Chemical industry: used in the production of insurance powder, sulfamethazine analgin, caprolactam and other products, as well as the purification treatment of chloroform, phenylpropyl sulfone and benzaldehyde. In the photography industry, sodium metabisulfite is often used as an ingredient in fixing agents. Used in the production of vanillin in the perfume industry. Sodium metabisulfite can also be used as a preservative in the brewing industry, a rubber coagulant and a dechlorinating agent for cotton cloth after bleaching.

　　Industry: used in printing and dyeing, organic synthesis, printing, pharmaceutical and other departments. Used as chemical reagents (printing and dyeing and photography), as bleaching agent, mordant, reducing agent rubber coagulant, also used in organic synthetic pharmaceuticals and perfumes.

　　Food: used as bleaching agent, preservative, loosening agent, antioxidant, color-protecting agent and preservative.

　　 Tannery: used for leather treatment, it can make the leather soft, plump, and tough, and has the properties of waterproof, folding resistance, and wear resistance.

　　Sodium metabisulfite has a wide range of uses. When using this product, avoid mixing with strong acids, strong oxidants and other products. When storing sodium metabisulfite, avoid exposure to humid air.