The differences between them are as follows:

1. Different ingredients: household salt is generally composed of sodium chloride and potassium iodate; The table salt may contain other ingredients, such as potassium chloride and sodium bicarbonate.

2. Different uses: household salt is mainly used for cooking and seasoning; While the catering salt is used in restaurants, hotels and other catering places.

3. Different standards: the hygienic standards of household salt and catering salt are also different, and household salt needs to meet the national hygienic standards; The catering salt needs to meet the hygiene standards of the catering industry.

4. Different prices: Due to different uses and production processes, the prices of household salt and catering salt are also different, but generally speaking, the price of catering salt will be higher than that of household salt.