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introduction
Due to the addition of some chemical substances in the development of microorganisms in foodstuffs, it can be reluctant. However, chemical substances should not be harmful to humans.
Chemical preservatives are known to contain chemical substances that are included in food items, to prevent their defect.
In our country, togochemical preservatives are allowed, which are using 1: 1

Benzoic acid (or sodium benzoate) 2

Sulfur dioxide (or potassium bisulfate)
Benzoic acid
Or its sodium salt, sodambangayuet is commonly used for preserving the conservation material. Fruit preservation, fruit juice, squash and jam sodium benzoateis are used as preservatives because it is soluble in water and therefore easy to feed