PIRC 036 CITRIC ACID is an organic compound with the chemical formula HOC(CO2H)(CH2CO2H)2. It is a colorless weak organic acid. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms.

It is commonly used to stabilize iron in spent HCl acids and prevent precipitation of ferric hydroxide, and/or iron sulfide. Besides its ironchelating ability, citric acid possesses another important chemical characteristic. Citric acid is a weak acid and this makes it less reactive with reservoir rocks than hydrochloric acid.

Citric acid has been used in some field treatments as an alternative to other conventional weak acids such as formic acid (HCOOH) and acetic acid (CH3COOH).

It was introduced because it can be used in an encapsulated form, which prevents its reaction with both the production tubulars and the formation up to 180 °F(11,12), and hence this will protect well tubulars, especially those made of corrosion resistant alloys.



  • An excellent Chelating Agent
  • Remove and discourage the buildup of limescale from boilers and evaporators.
  • Used to dissolve rust from steel, and to passivate stainless steels
  • Used to control pH



Apperance : Solid (Granular)
Odor : Odorless
Colour : White
Density : 1.665 g/cm3