Cyanuric acid
Cyanuric acid
CAS: 108-80-5
Molecular Formula: C3H3N3O3
Cyanuric acid - Names and Identifiers
| Name | Cyanuric acid |
| Synonyms | cp4789 Cyanursαure Cyanuric acid Tricyanic acid isocyanuric acid -Azabarbituric acid 2,4,6-Triazinetrione 2,4,6-Trihydroxytriazine Cyanuric acid, anhydride 1,3,5-triazine-2,4,6-triol 1,2,3-triazine-4,5,6-triol 1,3,5-Triazin-2,4,6-triol 1,3,5-Triazinan-2,4,6-trion 1,3,5-triazinane-2,4,6-trione cyanuricacid(non-specificname) 1,3,5-Triazinane-2,4,6-trione 1,3,5-triazine-2,4,6(1h,3h,5h)-trione 1,3,5-triazine-2,4,6(1H,3H,5H)-trione |
| CAS | 108-80-5 |
| EINECS | 203-618-0 |
| InChI | InChI=1/C3H3N3O3/c7-1-2(8)4-6-5-3(1)9/h(H,6,7)(H2,4,5,8,9) |
| InChIKey | ZFSLODLOARCGLH-UHFFFAOYSA-N |
Cyanuric acid - Physico-chemical Properties
| Molecular Formula | C3H3N3O3 |
| Molar Mass | 129.07 |
| Density | 1.56 |
| Melting Point | 360 °C |
| Boling Point | 74 °C |
| Flash Point | 250.804°C |
| Water Solubility | 0.3 g/100mL (25 ºC) |
| Solubility | water: soluble0.2% at 25°C water: soluble10% at 150°C DMSO: soluble17.4% water: solub |
| Appearance | Powder |
| Color | White to light beige |
| Merck | 14,2698 |
| BRN | 126982 |
| pKa | 6.88, 11.40, 13.5(at 25℃) |
| PH | 3.8-4.0 (H2O, 20℃)(saturated solution) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Sensitive | Easily absorbing moisture |
| Refractive Index | 1.4500 (estimate) |
| MDL | MFCD00082990 |
| Physical and Chemical Properties | Character: white crystal. No odor, slightly bitter taste. melting point> 360 ℃ (decomposition) boiling point freezing point relative density 2.500 refractive index flash point solubility: soluble in water, hot ethanol, pyridine, concentrated hydrochloric acid and hot sulfuric acid, insoluble in cold methanol, ether, acetone, benzene and chloroform. |
| Use | Mainly used for the preparation of new bleaching agents, Disinfection fungicides, water treatment agents and resins, coatings and metal cyanide corrosion inhibitors |
Cyanuric acid - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| HS Code | 29339900 |
| Toxicity | LD50 orally in rats: >5.00 g/kg (Canelli) |
Cyanuric acid - Upstream Downstream Industry
Cyanuric acid - Reference
| Reference Show more | 1. Hu Chengcheng, Chen Ying, Li Xiaobin, et al. Preparation of Calcium Cyanurate/Zinc and Its Application in PVC Products [J]. Fine Chemicals, 2019, 36(02):153-160. 2. Mo Chunlan, Mo Yitao, Chen Junhong, Long Hualin, Qiu Chonghuan, Jiang Mingru. Study on Thermal Decomposition Process of Urea in SCR System of Diesel Engine [J]. Combustion Science and Technology, 2021,27(01):16-22. 3. Lin Kengchun, Deng Maocheng, Li Jing, Huang Huaixing, Huang Weizhong, Huang Jiehua, Zhang Xiaotao, Fang Weina. Screening of Uric Acid Oxidase Producing Strain and Study on Its Enzymatic Properties [J]. Brewing in China, 2021,40(03):79-83. |
Cyanuric acid - Nature
Open Data Verified Data
There are several tautomers; Tri-NH-type, di-NH-type, mono-NH-type, Tri-OH-type. Mainly three-NH-type. White Crystal (water), odorless, bitter taste. mp 360℃,bp150~180 ℃ (2.67), sublimation, dl. 768. Soluble in water, hot ethanol, pyridine, concentrated hydrochloric acid and sulfuric acid, insoluble in ether, acetone, chloroform and benzene. Sublimation, high temperature decomposition of cyanic acid. It reacts vigorously with ethanol and forms an explosive product in contact with chlorine gas.
Last Update：2025-06-10 22:55:16
Cyanuric acid - Preparation Method
Open Data Verified Data
There are several synthetic methods.
- urea pyrolysis is obtained by pyrolysis and cyclization.
- the urine salt pyrolysis method is that urea and sulfuric acid (or hydrochloric acid, nitric acid) are mixed at 4.5:4, the temperature is 200 C, the reaction time is 5h, the yield of cyanuric acid is 50% ~ 53%, 9726-98%.
- cyanuric acid was directly synthesized from hydrogen, carbon monoxide and nitric oxide with palladium and Iridium as catalyst at 280~480 ℃ with yield of 60% ~ 75%. This method has been industrialized.
Last Update：2022-01-01 10:53:57
Cyanuric acid - Introduction
The depolymerization is cyanic acid and isocyanic acid at about 330 ℃. Those precipitated from water contain 2 molecules of crystal water, which loses moisture in the air and weathered; those precipitated from concentrated hydrochloric acid or sulfuric acid are anhydrous crystals. Solubility in water: 0 · 3g/100ml (25°C), soluble in hot water; Hot alcohol; Pyridine; Concentrated hydrochloric acid and sulfuric acid without decomposition, also soluble in sodium hydroxide and potassium hydroxide aqueous solution, insoluble in cold alcohol; Ether; Acetone; Benzene and chloroform. No smell, slightly bitter taste. The product also exists in the form of ketone (or isocyanuric acid).
Last Update：2022-10-16 17:11:56
Cyanuric acid - Application
Open Data Verified Data
This product can be used for the synthesis of chlorinated derivatives, such as trichloroisocyanuric acid, sodium or potassium dichloroisocyanurate, excellent performance, a wide range of uses. It can be directly used as a stabilizer for swimming pool chlorine treatment agents, flame retardants for nylon, polyester, polyurethane foam plastics, butadiene rubber heat stabilizers and the like. Chlorinated isocyanuric acid can be used as a disinfectant in industrial water, swimming pool water, cleaning agents, hospitals, tableware, etc., as a disinfectant in agriculture and sericulture, but also for wool shrinkage, fabric and paper bleaching. Isocyanurate can be used as a modifier of polymer materials, cross-linking agents, cross-linking agents, antioxidants, flame retardants; This product is also used for the synthesis of cyanuric acid formaldehyde resin, epoxy resin and other heat-resistant resins, adhesives, coatings, oil resistant insulating plasticizer, wire insulating varnish, laminated plastic and high temperature glass fiber reinforced plastic and other raw materials and organic synthesis intermediates.
Last Update：2025-08-19 16:24:40
Cyanuric acid - Safety
Open Data Verified Data
- in animal experiments, it was proved that the acute toxicity was not obvious, and the rats were fed with 30mg/kg, six times a week for 6 months, and the weight gain was delayed. But local injection can cause sarcoma. It is irritant to human skin and mucous membrane, and decomposes above 330 ℃ to produce hydrocyanic acid. Local overheating should be avoided in the production process. The operator should wear protective gear.
- the use of plastic barrels or lined with plastic bags of iron drum packaging, heat, sun, moisture. According to the provisions of highly toxic chemicals storage and transportation.
Last Update：2022-01-01 10:53:58
Cyanuric acid - Reference Information
| LogP | -1.31 at 25℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | cyanuric acid is also called isocyanuric acid, cyanuric acid, molecular formula: C3H3N3O3, tasteless white powder or particles in appearance, slightly soluble in water, melting point 330 ℃, pH value of saturated solution ≥ 4.0. Mainly used to manufacture cyanuric acid bromide, chloride, bromine chloride, iodide chloride and its cyanuric acid salts and esters, used to synthesize new disinfectants, water treatment agents, bleaching agents, chlorinating agents, brominating agents, Antioxidants, paints, selective herbicides and metal cyanide moderators can also be directly used as swimming pool chlorine stabilizers, nylon, plastics, polyester flame retardants and cosmetic additives, and the synthesis of special resins. |
| reference quality standard | cyanuric acid content ≥ 98.5% drying weight loss ≤ 0.5% burning residue ≤ 0.1% 1% aqueous solution PH ≥ 4.0 iron content ppm ≤ 25 sulfate ≤ 0.5% specification powder |
| cyanuric acid toxicity | cyanuric acid has low acute toxicity to mammals, and the oral median lethal dose of rats is 7700 mg per kilogram of body weight (OECD 1999). Several subchronic oral toxicity studies have shown that cyanuric acid causes renal tissue damage, including renal tubular dilation, renal tubular epithelial necrosis or hyperplasia, increased basophilic renal tubules, neutrophil infiltration, and mineralization and fibrosis. These changes may be caused by cyanuric acid crystals in renal tubules (OECD 1999). For these conditions, the NOAEL is 150 mg/kg/day (OECD 1999). In the human body, more than 98% of the oral intake of cyanuric acid is excreted in the urine in its original form within 24 hours (Allen et al 1982). In several short-term and long-term studies, sodium dichloroisocyanurate tests were performed in rats and mice. The compound did not induce any genotoxic, carcinogenic or aberrant effects. Observation of rats and mice ingesting large doses of sodium dichloroisocyanurate found bladder stones and bladder epithelial hyperplasia, and longer-term studies also found renal tubular lesions. The two-year trial in rats showed that the dose of sodium dichloroisocyanurate without obvious adverse effect was 154 mg/kg body weight per day (WHO 2004). |
| Use | Used as ultraviolet absorber for plastic film Used as chemical reagent, also used in organic synthesis Mainly used to make new bleaching agents, disinfectants, water treatment agents, resins, coatings and metal cyanide corrosion inhibitors, etc. Used to synthesize chlorinated derivatives, trichloroisocyanuric acid, sodium dichloroisocyanurate or potassium; used for the synthesis of cyanuric acid-formaldehyde resin, epoxy resin, antioxidants, coatings, adhesives, pesticides and herbicides, metal cyanide corrosion inhibitors, polymer material modifiers, etc.; used for the production of drug halotrioxazine. |
| production method | obtained by polymerization of urea. Urea and ammonium chloride are mixed, heated and melted, stirred and heated to 210 ℃, the solution thickened, heated to above 230 ℃, the melted material gradually solidified, stir-fried evenly, continued to heat to 250 ℃, and kept warm for 15min. Cold to 100 ℃, add a small amount of water to soak, reduce to normal temperature, soak in water and crush, filter out the solid. Add water and hydrochloric acid into the solid, stir and heat to 110 ℃, keep the temperature for 3 hours, add hydrochloric acid and water in times, cool down to 30 ℃, wash to neutral, filter, wash the filter cake with water, and dry to obtain the finished product. The purity of industrial products is ≥ 95%, and 1200kg of urea is consumed per ton of products. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-05-21 12:31:17
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View History
Raw Materials for Cyanuric acid
Downstream Products for Cyanuric acid
1,3,5-Triglycidyl Isocyanurate
Dichloroisocyanuric acid, sodium salt
Triallyl isocyanurate
tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanur
1,3,5-Tris(2-hydroxyethyl)cyanuric acid
Dichloroisocyanuric acid, sodium salt
Triallyl isocyanurate
tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanur
1,3,5-Tris(2-hydroxyethyl)cyanuric acid