Edible baking soda, referred to as "food powder", known as "soda" in Hong Kong, is a food additive, in the form of a white powder, odorless, tastes with a salty flavor, can be dissolved in water. It is mostly used to make food such as steamed buns and cookies, as well as drinks such as soft drinks.

Meanwhile, edible baking soda is also widely used in medicine, chemical industry, bath and many other industries, can play the role of antibacterial, anti-inflammatory, anti-poisoning, deodorization, cleaning. For example, teacups, teapots or other utensils with too much dirt, not good to brush off, with dissolved food baking soda in the water soak, and then brush will be very easy.