Properties: Corosolic acid is light yellow or green yellow powder

Extraction sources: Corosolic acid source from leaf extraction of Barnabas, loquat leaf extraction

Corosolic acid (CA) is a pentacyclic triterpene compound of α-aromatic resin alcohol type or usane type, whose basic skeleton is a pentacyclic parent nucleus of multi-hydrogen pinene.

Physical and chemical properties: Corosolic acid(CA) is a  light yellow or green yellow amorphous powder, soluble in petroleum ether, benzene, chloroform, pyridine and other organic solvents, insoluble in water, soluble in hot ethanol, methanol. When in anhydrous conditions, color reactions or fluorescence may occur with strong acids (sulfuric acid, phosphoric acid, perchloric acid), moderately strong acids (trichloroacetic acid) or Lewis acid (zinc chloride, aluminum chloride, antimony trichloride).

Corosolic acid (CA) can exist in plants free or in the form of saponins. In plants, it often co-exists with its isomer Hawkic acid (2α-hydroxyl oleanolic acid), Corosolic acid (CA) has similar structure and chemical properties and is difficult to separate.