Azelaic acid (aza) is an organic compound with the formula hooc(ch 2) 7 cooh. this saturated dicarboxylic acid exists as a white powder. it is found in wheat, rye, and barley.it is a precursor to diverse industrial products including polymers and plasticizers, as well as being a component of a number of hair and skin conditioners. aza inhibits tyrosinase.
Kojic acid is a chelation agent produced by several species of fungi, especially aspergillus oryzae, which has the japanese common name koji. kojic acid is a by-product in the fermentation process of malting rice, for use in the manufacturing of sake, the japanese rice wine. it is a mild inhibitor of the formation of pigment in plant and animal tissues, and is used in food and cosmetics to.
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