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Citric acid is a weak organic acid, and it is a natural preservative and is also used to add an acidic, or sour, taste to foods and soft drinks. In biochemistry, it is important as ... - What is Citric Acid?
Brief and Straightforward Guide: What is Citric Acid? ... Usually produced in powder form, citric acid is naturally found in citrus fruits. - Citric acid cycle - Wikipedia, the free encyclopedia
The citric acid cycle — also known as the tricarboxylic acid cycle (TCA cycle), the Krebs cycle, or more rarely, the Szent-Györgyi-Krebs cycle [1] [2] — is a series of enzyme ...
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Citric Acid
Encyclopedia Article
Citric Acid, white solid, C3H4OH (COOH)3, soluble in water and slightly soluble in organic solvents, which melts at 153°C (307°F). Aqueous solutions of citric acid are slightly more acidic than solutions of acetic acid. Traces of citric acid are found in numerous plants and animals, because it is a nearly universal intermediate product of metabolism. Large amounts of the acid are found in the juice of citrus fruits, from which it can be precipitated by the addition of lime; the resulting calcium citrate is treated with sulfuric acid to regenerate the citric acid. Fermentation of sugar by the mold Aspergillus niger has been another commercial source of the acid. It has been added to some foods and beverages to produce a pleasant acid flavor; it has also been used in medicines, in making blueprint paper, in textile printing, and as a polishing agent for metals.
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