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citric acid reagent grade

Product name citric acid reagent grade
Synonyms 2-hydroxypropane-1,2,3-tricarboxylic acid
GOST 3652-69
CAS 77-92-9

Citric acid is a colorless crystalline solid. It is readily soluble in water, ethanol, methanol. Citric acid is practically insoluble in aliphatic hydrocarbons. Being crystallized from water solution at the temperature <36.5°C it exists in monohydrate form. In biochemistry, citric acid is involved in important metabolism of almost all living things; the Krebs cycle (also called citric acid cycle or tricarboxylic acid cycle), a part of the process by which animals convert food to energy.

Production.

Major industrial route to citric acid used today, cultures of Aspergillus niger are fed on sucrose from sugar or treacle to produce citric acid. After the mold is filtered out of the resulting solution, citric acid is isolated by precipitating it with lime (calcium hydroxide) to yield calcium citrate salt, from which citric acid is regenerated by treatment with sulfuric acid.

Uses.

  • in food industry as acidity regulator, sequestering and stabilizing agent, antioxidants synergist, firming agent (E330);
  • as a buffer in acidic solutions;
  • to produce an extensive series of salts, esters, and mixed (double) salts;
  • in metal-cleaning compositions as it chelates metals;
  • as an intermediate in plasticizers (citric acid esters) and other chemicals and pharmaceuticals syntheses;
  • as a component of number of pharmaceuticals;

  • Manufacturer(s) JSC Citric acid plant
    JSC Citrobel
    Chemical structure of citric acid

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