Class A products are detergents directly used for cleaning food, and Class B products are detergents used for cleaning tableware, tools, equipment, containers and food packaging materials that come into contact with food.

As the most commonly used detergent in daily life, the safety of detergent has always been controversial. Because it will come into direct contact with food in daily use, its safety and health have always been concerned by consumers.

Detergent is a product specially prepared for cleaning through the cleaning process. The main components are usually composed of surfactants, builders and additives. There are many kinds of detergents, which can be divided into heavy-duty detergents and light-duty detergents according to the types of dirt removal. According to the shape of the product, it can be divided into powder, block, paste, paste and liquid.