ORACIT

Citric acid is an organic compound with the chemical formula HOC(CO2H)(CH2CO2H)2.[9] It is a colorless weak organic acid.[9] It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms.[9] More than two million tons of citric acid are manufactured every year. It is used widely as an acidifier, as a flavoring, and a chelating agent.[10&#... [wikipedia]