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Are potassium sorbate, sodium benzoate, sodium chloride, barium chloride, sodium nitrite and sodium pyronitrite toxic?
Potassium sorbate:

Chemical preservative. Belonging to an organic acid preservative.

It has a strong inhibitory effect on spoilage bacteria and mold, and has become the most important preservative in the world because its toxicity is far lower than other preservatives.

Sodium benzoate:

Sodium benzoate is a preservative for oral liquid medicine, which can prevent deterioration and sourness and prolong the shelf life. Too much sodium benzoate will do harm to human liver and even cause cancer.

Sodium chloride:

It is used to prepare physiological saline in medical treatment and can be used as seasoning in life. It is the main component of the salt we eat.

Barium chloride:

0.2~0.5g of barium chloride can cause poisoning, and the lethal dose is 0.8 ~ 0.9g If poisoning is found, take magnesium sulfate or sodium sulfate immediately, and take measures such as gastric lavage, enema and emesis. Seek medical attention quickly. Barium poisoning has obvious hypokalemia symptoms.

Sodium nitrite:

Nitrite is harmful to human body, which can oxidize low iron hemoglobin in blood into methemoglobin, lose the ability to transport oxygen, and cause tissue hypoxia damage. Nitrite is not only a carcinogen, but can cause food poisoning when ingested at 0.2-0.5g, and it can kill at 3g. Nitrite is a kind of food additive, which plays the role of coloring and antisepsis, and is widely used in animal foods such as cooked meat, enema and canned food. In view of the many beneficial effects of nitrite in meat curing, it is still allowed to be used in meat curing all over the world, but the dosage is strictly limited.

Sodium pyrosulfite:

As a food additive, sodium metabisulfite should not exceed the standard, otherwise it will be harmful to human health.

Sodium pyrosulfite is a chemical substance harmful to human health. It has obvious irritation to skin and mucosa, and can cause symptoms of conjunctiva and bronchitis. Patients with allergies or asthma are very sensitive to this, and direct skin contact can cause burns.