Caffeic acid exists in honeysuckle, wormwood, vegetable thistle and other plants, but also in the form of chlorogenic acid naturally exists in coffee, caffeic acid belongs to phenolic acid compounds, easy to dissolve in hot water, cold acetic acid, ethyl acetate. The basic solution of caffeic acid has a reddish orange appearance, and when caffeic acid meets a solution of ferric chloride, it turns dark green.
Caffeic acid, molecular formula C9H8O4, molecular weight 180.15, CAS accession number 331-39-5, has a variety of life activities, therefore, caffeic acid is used in medicine, cosmetics, biochemical research, organic synthesis and other fields, it is in the field of medicine, as a pharmaceutical raw material used for drug configuration, used in the treatment and prevention of a variety of diseases. In the field of cosmetics can be used as moisturizing ingredients to add. Caffeic acid is used in many products, but more in the pharmaceutical industry.