... fermented by a kind of microorganism.,called Kojic acid. 2). Kojic acid is white or cream colored acicular crytal, ... water, alcohol, acetone, slightly dissolving ether second ester of second acid, chloroform and pyridine, non-dissolving benzene;molecular formula ... cosmetic, bath cream midtoothpaste. The products containing kojic acid can treat freckle, acne, pigmentation and macula effectively ...