Alum, the name of Chinese medicine. It is refined from sulfate mineral alunite.
Colorless cubic crystals are often octahedral in appearance, or aggregated with cubes and rhombic dodecahedrons, and sometimes attached to the container wall in the form of hexagonal plates, belonging to α -alum double salt with glass luster. Soluble in water, insoluble in ethanol.
Can be used as Chinese medicine. It can be used to prepare aluminum salt, baking powder, paint, tanning material, clarifier, mordant, papermaking, waterproof agent, etc. It can also be used as food additive. In our life, it is often used to purify water and as an edible swelling agent, such as fried sesame balls and fried dough sticks.
Extended exhibition:
Explicitly prohibit:
Food additives containing aluminum may be used in the processing of fried dough sticks, steamed bread, noodles and puffed food, which will do great harm to human body, especially to children's growth and intelligence.
According to the regulations of five departments, such as the National Health Planning Commission, from July 1 day, 2065438, flour products such as steamed bread and cakes (except fried flour products, batter for hanging paste, wrapped flour and fried flour) cannot be added with aluminum-containing leavening agents, such as potassium aluminum sulfate and ammonium aluminum sulfate, commonly known as "alum", and the main component of the compound leavening agent (namely baking powder) is also available.
In puffed food, it is no longer allowed to use any food additives containing aluminum.
Baidu Encyclopedia-Alumni (Traditional Chinese Medicine)