3,4-dihydroxybenzoic acid is a medicinal component. It is mostly white crystalline powder and sometimes brown crystal, which is easy to change color in the air. After meeting ferric chloride aqueous solution, its color will be blue-green.
3,4-dihydroxybenzoic acid, also known as 3,4-dihydroxybenzoic acid, is a phenolic acid, water soluble, soluble in ethanol and ether, molecular formula C7H6O4, molecular weight 154.12, CAS registration number 99-50-3, melting point about 200℃, density 1.54g/cm3.
3,4-dihydroxybenzoic acid is mainly found in the leaves of pteridophyte or Holly, which can only be obtained after purification and processing. Storage of 3,4-dihydroxybenzoic acid is recommended to be stored in a cool and dark environment. 3,4-dihydroxybenzoic acid can be used in medicine, health care products and other industries, with antibacterial, nerve protection, detoxification snake venom and other functions.