Legal analysis: it needs to be handed over to the public security organs. Nitrite is a highly toxic and carcinogenic substance. Adults can be poisoned by ingesting 0.2-0.5g, and can be killed by ingesting 3g. Therefore, China has strict control standards for the content of this chemical. According to the relevant laws and regulations of our country, it is forbidden to use non-food raw materials to produce food, to use chemicals other than food additives and other substances that may endanger human health to produce food, and to use recycled food as raw materials to produce food. At the same time, China requires local catering supervision departments to supervise the on-site destruction of nitrite found illegally by catering service units. Catering service units that purchase, store and use nitrite in serious violation of laws and regulations and cause serious consequences will be listed in the regulatory blacklist for exposure, transferred to judicial organs and severely punished according to law to ensure that relevant regulations and requirements prohibiting the use of nitrite in catering services are put in place.

Legal basis: Article 34 of the Food Safety Law of People's Republic of China (PRC) prohibits the production and marketing of the following foods, food additives and food-related products: (1) Foods produced using non-food raw materials or using chemicals other than food additives and other substances that may endanger human health, or foods produced using recycled foods as raw materials; (2) Pathogenic microorganisms, foods, food additives and food-related products with pesticide residues, veterinary drug residues, biotoxins, heavy metals and other substances harmful to human health exceeding food safety standards; (3) Foods and food additives produced by using food raw materials and food additives that have exceeded the shelf life; (4) Foods that use food additives beyond the scope and limit; (five) the main and auxiliary foods specially designed for infants and other specific groups whose nutritional components do not meet the food safety standards; (six) food and food additives that are spoiled, rancid, moldy, unclean, mixed with foreign substances, and adulterated with false or abnormal sensory properties; (seven) poultry, livestock, animals, aquatic animals and their products that died of illness, poisoning or unknown causes; (eight) meat that has not been quarantined or failed to pass the quarantine according to the regulations, or meat products that have not been inspected or failed to pass the inspection; (nine) food and food additives contaminated by packaging materials, containers and means of transport; (ten) food and food additives with false production date, shelf life or beyond the shelf life; (eleven) unlabeled prepackaged foods and food additives; (12) Foods whose production and marketing are explicitly prohibited by the state for special needs such as disease prevention; (thirteen) other foods, food additives and food-related products that do not meet the laws, regulations or food safety standards.