Citric acid

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Description

Citric acid is an organic acid known by the molecular formula C6H8O7. The appearance of this compound is a solid, crystalline and white powder with a melting point of 153 degrees Celsius and a boiling point of 175 degrees Celsius. The acidity of this compound is high and it is divided into two categories of dry citric acid (anhydrosis) and aqueous citric acid (monohydrate).

Iupac is called 2-hydroxy, 1, 2, and 3-propane tricarboxylic acid (2-hydroxypropane-1,2-3-tricarboxylic acid). This acid was discovered by the Iranian scientist Jaber bin Hayyan. This acid is also known as citric acid, lemon essence and citric acid.

Citric acidity is due to the presence of three carboxy groups that can lose protons. Citric acid ion is known as citrate. Citrates are good buffers for controlling the pH of acidic solutions. Citrate ion forms citrate with many metal salts, the most important of which is calcium citrate (lemon essence), which is used to keep food from spoiling and to make it taste good. Citrate ions can form chelating compounds with metals.

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