Cyanuric Acid

Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

cyanuric acid

[¦sī·ə¦nu̇r·ik ′as·əd]
(organic chemistry)
HOC(NCOH)2N·2H2O Colorless, monoclinic crystals, slightly soluble in water; formed by polymerization of cyanic acid. Also known as pyrolithic acid.

Cyanuric Acid


(formula I), a cyclic trimer of cyanic acid; a colorless crystalline compound, which is soluble in hot water and alcohol.

Upon heating to 150°C, cyanuric acid depolymerizes without melting. Upon the action of alkalies, it forms monobasic, dibasic, and tribasic salts. In some of its reactions, for example, with diazomethane, it reacts in its tautomeric form—isocyanuric acid (II). Cyanuric acid may be produced by heating urea, as well as by other methods. The triamine derivatives of cyanuric acid— melamines—are of industrial importance, mainly in the production of melamine-formaldehyde resins. The acid-chloride derivative of cyanuric acid—cyanuric chloride—is also of industrial importance.

References in periodicals archive ?
We found that a possible contamination event, substantial hotel pool use, and the use of cyanuric acid might have contributed to this outbreak and its magnitude.
Specificity - Establish by analyzing sample blanks and sample materials known to be free of both melamine and cyanuric acid (if available).
Pressure is mounting against azos in food packaging applications, he asserts, because the cyanuric acid can yield a toxic decomposition product, hydrogen cyanide.
The effect of cyanuric acid on the disinfection rate of Cryptosporidium parvum in 20-ppm free chlorine.
2], among many other degradation products such as cyanuric acid [(CNOH).
Melamine concentrations ranged from 150 mg/kg to 4,700 mg/kg (median, 1,900 mg/kg), and cyanuric acid concentrations ranged from 0.
By now many have surmised why melamine (or cyanuric acid, or urea) is added to protein-based products such as powdered milk, wheat gluten and isolated soy protein.
Additionally, in transmission the meter tests for ammonia, chloride, chlorine dioxide, chromium hexavalent, cyanuric acid, iodine, iron, low-range total hardness, manganese, nitrate, nitrite, acid pH, alkali pH, potassium, sulfate, sulfide and turbidity.
The toxicity of melamine is due to the formation of insoluble crystals between melamine and cyanuric acid (a byproduct of melamine) and can cause the development of kidney stones in pets and babies.
All finished products are tested by an independent laboratory for melamine and cyanuric acid, salmonella, and other toxins before they are released for sale.
The new Food Testing Method for Melamine and Cyanuric Acid, based on liquid chromatography-mass spectrometry (LC/MS), increases accuracy and reduces the time required to identify these contaminants from 30 minutes to less than six minutes *.