... 99% cosmetic grade 3. Reach registration 1, Quality Scientific name 5-hydroxy-2-hydroxamethy-1,4-pyrone. 1). A weak-acid ... fermented by a kind of microorganism.,called Kojic acid. 2). Kojic acid is white or cream colored acicular crytal, dissolving ... brightening cosmetic, bath cream midtoothpaste. The products containing kojic acid can treat freckle, acne, pigmentation and macula effectively without ...