Trichloroisocyanuric acid

Trichloroisocyanuric acid
IUPAC name
Other names
  • Trichlor
  • Isocyanuric chloride
  • 1,3,5-Trichloro-1,3,5-triazine-2,4,6(1H,3H,5H)-trione
  • Chloreal
  • Symclosene
  • Trichloro-s-triazinetrione
  • TCCA
87-90-1 YesY
3D model (Jmol) Interactive image
ChEBI CHEBI:33015 YesY
ChemSpider 6643 YesY
ECHA InfoCard 100.001.621
PubChem 6909
RTECS number XZ1925000
Molar mass 232.40 g·mol−1
Appearance Colorless solid
Density 2.19 ± 0.1 g/cm3
Melting point 246 to 247 °C (475 to 477 °F; 519 to 520 K)
Boiling point decomposes
Solubility in other solvents Soluble in chlorocarbons, acetone, and acetonitrile
0 D
Main hazards lung irritant
R-phrases R8, R22, R31, R36/37, R50/53
S-phrases S8, S26, S41, S60, S61
Flash point NA
Related compounds
Related compounds
Cyanuric chloride
Dichloroisocyanuric acid
Tribromoisocyanuric acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is YesYN ?)
Infobox references

Trichloroisocyanuric acid is an organic compound with the formula (C3Cl3N3O3). It is used as an industrial disinfectant, bleaching agent and a reagent in organic synthesis.[1][2] This white crystalline powder, which has a strong "chlorine odour," is sometimes sold in tablet or granule form for domestic and industrial use. Salts of trichloroisocyanuric acid are known as trichloroisocyanurates.


The compound is a disinfectant, algicide and bactericide mainly for swimming pools and dyestuffs, and is also used as a bleaching agent in the textile industry. It is widely used in civil sanitation for pools and spas, preventing and curing diseases in animal husbandry and fisheries, fruit and vegetable preservation, wastewater treatment, as an algicide for recycled water in industry and air conditioning, in anti shrink treatment for woolens, for treating seeds and in organic chemical synthesis.

Trichloroisocyanuric acid as used in swimming pools is easier to handle than chlorine. It dissolves slowly in water, but as it reacts, cyanuric acid concentration in the pool will build-up. At high cyanuric acid concentrations, normal chlorine levels can be rendered ineffective, requiring either dilution by draining and refilling the pool or by adding abnormally high doses of chlorine to overcome this effect.

See also


  1. Hiegel, G. A. (2001). "Trichloroisocyanuric Acid". Encyclopedia of Reagents for Organic Synthesis. New York: John Wiley & Sons. doi:10.1002/047084289X.rt209.
  2. Barros, J. C. (2005). "Trichloroisocyanuric acid". Synlett. 2005 (13): 2115–2116. doi:10.1055/s-2005-872237.
This article is issued from Wikipedia - version of the 10/5/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.