Cyanuric acid

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  • Identifiers

    CAS number
    108-80-5

    Molecular formula
    C3H3N3O3

    SMILES
    C1(=O)NC(=O)NC(=O)N1

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 67.89%
    Burnt 30.46%
    Pungent 25.07%
    Bitter 19.33%
    Nutty 16.82%
    Sharp 16.08%
    Sour 15.31%
    Cooked 15.0%
    Sulfurous 14.31%
    Musty 13.66%

     

    Flavor
    Bitter 61.0%
    Odorless 43.15%
    Formyl 20.56%
    Rotten 20.11%
    Nitrile 19.94%
    Urine 19.65%
    Mousy 18.79%
    Bread crust 18.66%
    Very strong 18.17%
    Almond shell 18.03%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    -1.2

    pKa est.
    10.24 (weak base)

    Molecular weight
    129.07 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • greater than 680 °F (DEC.) (NTP, 1992)
    • 360 °C

    Boiling point

    • DECOMPOSES (NTP, 1992)
    • Sublimes and dissociates to isocyanuric acid at higher />330 °C/ temperatures

    Flash point

    • 303.36 ˚C est.

    Solubility expt.

    • 0.5 mL (NTP, 1992)
    • Slightly soluble in common organic solvents such as acetone, benzene, diethyl ether, ethanol, hexane. Solubility (%): dimethylformamide 7.2; diemthyl sulfoxide 17.4.
    • Soluble in hot alcohols, pyridine, concentrated HCL without decomposition; in aqueous solutions of NaOH and KOH. Insoluble in cold methanol, ether acetone, benzene chloroform.
    • Solubility in 96% H2SO4 (25 °C): 14.1%
    • Solubility in water (%): 0.2 at 25 °C; 2.6 at 90 °C; 10.0 at 150 °C
    • For more Solubility (Complete) data for CYANURIC ACID (6 total), please visit the HSDB record page.
    • 2 mg/mL at 25 °C
    • Solubility in water, g/100ml at 25 °C: 0.27

  • Synonyms

    • CYANURIC ACID
    • 108-80-5
    • 1,3,5-Triazine-2,4,6-triol
    • Isocyanuric acid
    • Trihydroxycyanidine
    • Tricyanic acid
    • sym-Triazinetriol
    • s-Triazinetriol
    • 1,3,5-triazinane-2,4,6-trione
    • Pseudocyanuric acid
    • 1,3,5-Triazine-2,4,6(1H,3H,5H)-trione
    • Isocyanurate acid
    • 2,4,6-Trihydroxy-1,3,5-triazine
    • s-Triazine-2,4,6-triol
    • Kyselina kyanurova
    • s-2,4,6-Triazinetriol
    • Tricarbimide
    • s-Cyanuric acid
    • Trihydroxytriazine
    • Cyanuric acid (VAN)
    • s-Triazine-2,4,6(1H,3H,5H)-trione
    • 5-Azabarbituric acid
    • Kyselina kyanurova [Czech]
    • Caswell No. 862
    • sym-triazine-2,4,6-triol
    • s-Triazinetrione
    • Triazine-2,4,6-triol
    • s-Triazine-2,4,6-trione
    • NSC 6284
    • cyanurate
    • Cyanursaeure
    • Cyanursaure
    • Isocyanursaeure
    • Isozyanursaeure
    • Triazinetrione
    • Zyanursaeure
    • 2,4,6-Trihydroxy-S-triazine
    • CCRIS 5895
    • DTXSID7024873
    • HSDB 2818
    • EINECS 203-618-0
    • H497R4QKTZ
    • EPA Pesticide Chemical Code 081402
    • Normal cyanuric acid
    • CP 4789
    • CHEBI:17696
    • AI3-26483
    • 1,3,5-Triazin-2,4,6-triol
    • 2,4,6-Triazinetrione
    • NSC-6284
    • 135581-61-2
    • 2,4,6-Trihydroxytriazine
    • CYANURIC ACID [MI]
    • 2,4,6-Trioxohexahydro-1,3,5-triazine
    • CYANURIC ACID [HSDB]
    • DTXCID304873
    • CHEBI:38028
    • EC 203-618-0
    • Triazine-2,4,6(1H,3H,5H)-trione
    • s-Triazine-2,4,6(1H,3H,5H)-trione (8CI)
    • 504-19-8
    • KYSELINA KYANUROVA (CZECH)
    • 203-618-0
    • CAS-108-80-5
    • UNII-H497R4QKTZ
    • Cyanuric Acid (1.0 mg/10 mL in 84:16% ACN:H2O)
    • isocyanurate
    • Trihydroxy-1,3,5-triazine
    • sTriazinetriol
    • Zyanursaure
    • symtriazinetriol
    • sCyanuric acid
    • iso cyanuric acid
    • WDL
    • s-2,6-Triazinetriol
    • s2,4,6Triazinetriol
    • Cyanuric acid, 98%
    • s-Triazine-2,6-triol
    • bmse000135
    • Kyselina kyanurova(CZECH)
    • SCHEMBL20706
    • CHEMBL243087
    • SCHEMBL12145619
    • 2,4,6Trihydroxy1,3,5triazine
    • NSC6284
    • 2,6-Trihydroxy-1,3,5-triazine
    • Cyanuric acid, analytical standard
    • 1,3,5-triazine-2,4,6-trione
    • WLN: T6N CN ENJ BQ DQ FQ
    • STYM-TRIAZINE-2,4,6-TRIOL
    • Tox21_202362
    • Tox21_303192
    • BBL002489
    • MFCD00082990
    • STK386958
    • sTriazine2,4,6(1H,3H,5H)trione
    • (C O)3 (N H)3
    • AKOS000297068
    • AKOS023552913
    • s-Triazine-2,6(1H,3H,5H)-trione
    • USEPA/OPP Pesticide Code: 81402
    • CS-W011123
    • FC20672
    • HY-W010407
    • SB73670
    • NCGC00249215-01
    • NCGC00257109-01
    • NCGC00259911-01
    • AC-11368
    • AS-14694
    • 1,3,5Triazine2,4,6(1H,3H,5H)trione
    • DB-040845
    • 1,5-Triazine-2,4,6(1H,3H,5H)-trione
    • NS00009566
    • EN300-24846
    • C06554
    • E82993
    • 1,3,5-Triazine-2,4, 6(1H,3H,5H)-trione
    • A801927
    • Cyanuric acid, purum, anhydrous, >=98.0% (T)
    • Q411314
    • 1,3,5-Triazine-2,4,6-triol (ACD/Name 4.0)
    • F0001-0180
    • Z203045102
    • InChI=1/C3H3N3O3/c7-1-4-2(8)6-3(9)5-1/h(H3,4,5,6,7,8,9
    • 1,3,5-Triazine-2,4,6-triol;1,3,5-Triazine-2,4,6-trione;2,4,6-Trihydroxy-1,3,5-triazine

  • Applications

    Cyanuric acid (CAS 108-80-5) is used as a chlorine stabilizer in swimming pool formulations and water treatment to protect sanitizer from sunlight-induced degradation. It is a precursor to cyanuric chloride, enabling the synthesis of triazine herbicides such as atrazine and simazine. It also serves as a raw material for melamine cyanurate, a flame-retardant system employed in polymers, coatings and textiles. In polymer chemistry, cyanuric acid acts as a building block for triazine-based resins and crosslinking chemistries, contributing to the thermal and chemical stability of materials.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1.49
    methanol 3.09
    isopropanol 0.9
    water 6.63
    ethyl acetate 0.7
    n-propanol 1.11
    acetone 1.26
    n-butanol 0.76
    acetonitrile 1.0
    DMF 42.18
    toluene 0.05
    isobutanol 0.66
    1,4-dioxane 1.14
    methyl acetate 1.63
    THF 3.2
    2-butanone 1.19
    n-pentanol 0.51
    sec-butanol 0.67
    n-hexane 0.03
    ethylene glycol 5.3
    NMP 31.13
    cyclohexane 0.01
    DMSO 35.96
    n-butyl acetate 0.8
    n-octanol 0.26
    chloroform 0.14
    n-propyl acetate 0.91
    acetic acid 3.2
    dichloromethane 0.21
    cyclohexanone 1.02
    propylene glycol 5.02
    isopropyl acetate 0.4
    DMAc 35.3
    2-ethoxyethanol 5.05
    isopentanol 0.48
    n-heptane 0.03
    ethyl formate 1.89
    1,2-dichloroethane 0.19
    n-hexanol 0.31
    2-methoxyethanol 12.48
    isobutyl acetate 0.42
    tetrachloromethane 0.04
    n-pentyl acetate 0.43
    transcutol 4.24
    n-heptanol 0.26
    ethylbenzene 0.05
    MIBK 0.44
    2-propoxyethanol 4.54
    tert-butanol 0.75
    MTBE 0.27
    2-butoxyethanol 2.53
    propionic acid 2.97
    o-xylene 0.08
    formic acid 7.95
    diethyl ether 0.31
    m-xylene 0.06
    p-xylene 0.08
    chlorobenzene 0.05
    dimethyl carbonate 2.96
    n-octane 0.01
    formamide 12.13
    cyclopentanone 2.56
    2-pentanone 0.75
    anisole 0.27
    cyclopentyl methyl ether 0.69
    gamma-butyrolactone 6.2
    1-methoxy-2-propanol 7.71
    pyridine 0.79
    3-pentanone 0.66
    furfural 5.8
    n-dodecane 0.01
    diethylene glycol 8.37
    diisopropyl ether 0.07
    tert-amyl alcohol 0.63
    acetylacetone 0.97
    n-hexadecane 0.01
    acetophenone 0.56
    methyl propionate 1.93
    isopentyl acetate 0.58
    trichloroethylene 0.25
    n-nonanol 0.26
    cyclohexanol 0.35
    benzyl alcohol 0.47
    2-ethylhexanol 0.22
    isooctanol 0.21
    dipropyl ether 0.5
    1,2-dichlorobenzene 0.06
    ethyl lactate 2.95
    propylene carbonate 2.78
    n-methylformamide 12.6
    2-pentanol 0.33
    n-pentane 0.02
    1-propoxy-2-propanol 3.22
    1-methoxy-2-propyl acetate 1.88
    2-(2-methoxypropoxy) propanol 3.3
    mesitylene 0.05
    ε-caprolactone 1.71
    p-cymene 0.08
    epichlorohydrin 2.4
    1,1,1-trichloroethane 0.09
    2-aminoethanol 5.15
    morpholine-4-carbaldehyde 18.59
    sulfolane 12.91
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 0.97
    n-hexyl acetate 0.48
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 3.17
    sec-butyl acetate 0.39
    tert-butyl acetate 0.46
    decalin 0.01
    glycerin 14.05
    diglyme 6.1
    acrylic acid 4.58
    isopropyl myristate 0.23
    n-butyric acid 1.67
    acetyl acetate 0.38
    di(2-ethylhexyl) phthalate 0.54
    ethyl propionate 1.05
    nitromethane 8.61
    1,2-diethoxyethane 0.64
    benzonitrile 0.36
    trioctyl phosphate 0.44
    1-bromopropane 0.11
    gamma-valerolactone 7.47
    n-decanol 0.2
    triethyl phosphate 0.96
    4-methyl-2-pentanol 0.21
    propionitrile 0.88
    vinylene carbonate 2.42
    1,1,2-trichlorotrifluoroethane 5.29
    DMS 1.07
    cumene 0.06
    2-octanol 0.16
    2-hexanone 0.68
    octyl acetate 0.33
    limonene 0.1
    1,2-dimethoxyethane 6.5
    ethyl orthosilicate 0.75
    tributyl phosphate 0.62
    diacetone alcohol 1.7
    N,N-dimethylaniline 0.46
    acrylonitrile 1.79
    aniline 0.31
    1,3-propanediol 4.16
    bromobenzene 0.03
    dibromomethane 0.12
    1,1,2,2-tetrachloroethane 0.3
    2-methyl-cyclohexyl acetate 0.53
    tetrabutyl urea 1.13
    diisobutyl methanol 0.18
    2-phenylethanol 0.37
    styrene 0.04
    dioctyl adipate 0.56
    dimethyl sulfate 8.82
    ethyl butyrate 0.83
    methyl lactate 6.87
    butyl lactate 1.76
    diethyl carbonate 0.82
    propanediol butyl ether 3.38
    triethyl orthoformate 0.99
    p-tert-butyltoluene 0.08
    methyl 4-tert-butylbenzoate 1.13
    morpholine 2.7
    tert-butylamine 0.27
    n-dodecanol 0.16
    dimethoxymethane 7.21
    ethylene carbonate 1.81
    cyrene 5.11
    2-ethoxyethyl acetate 0.86
    2-ethylhexyl acetate 0.46
    1,2,4-trichlorobenzene 0.11
    4-methylpyridine 0.73
    dibutyl ether 0.24
    2,6-dimethyl-4-heptanol 0.18
    DEF 3.51
    dimethyl isosorbide 4.49
    tetrachloroethylene 0.17
    eugenol 1.83
    triacetin 1.26
    span 80 2.0
    1,4-butanediol 2.05
    1,1-dichloroethane 0.11
    2-methyl-1-pentanol 0.34
    methyl formate 7.58
    2-methyl-1-butanol 0.57
    n-decane 0.02
    butyronitrile 0.68
    3,7-dimethyl-1-octanol 0.22
    1-chlorooctane 0.05
    1-chlorotetradecane 0.03
    n-nonane 0.02
    undecane 0.02
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 0.85
    tetrahydropyran 0.44
    tert-amyl methyl ether 0.35
    2,5,8-trioxanonane 4.49
    1-hexene 0.09
    2-isopropoxyethanol 2.21
    2,2,2-trifluoroethanol 3.48
    methyl butyrate 1.54

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction