The ethanol concentration required when preparing the Baibu tincture solution is 50%.

Ethanol knowledge expansion:

Ethanol is an organic compound with a simplified structural formula of CH3CH2OH or C2H5OH and a molecular formula of C2H6O, commonly known as alcohol. ?

Ethanol is a volatile, colorless and transparent liquid at normal temperature and pressure, with low toxicity. The pure liquid cannot be drunk directly. The aqueous solution of ethanol has a wine-like smell, is slightly irritating, and has a sweet taste. Ethanol is flammable and its vapor can form explosive mixtures with air. Ethanol is miscible with water in any ratio, and is miscible with chloroform, ether, methanol, acetone and most other organic solvents.

Ethanol can be used to make acetic acid, beverages, flavors, dyes, fuels, etc. In medicine, ethanol with a volume fraction of 70% to 75% is commonly used as a disinfectant. Ethanol is widely used in the chemical industry, medical and health care, food industry, agricultural production and other fields.