1,3-Dichloro-5,5-dimethylhydantoin

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  • Identifiers

    CAS number
    118-52-5

    Molecular formula
    C5H6Cl2N2O2

    SMILES
    CC1(C(=O)N(C(=O)N1Cl)Cl)C

    Safety labels

    Oxidizer
    Oxidizer

    Corrosive
    Corrosive

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 64.17%
    Sweet 30.98%
    Burnt 21.25%
    Caramellic 18.2%
    Cooling 17.87%
    Bitter 17.22%
    Nutty 14.77%
    Woody 13.97%
    Popcorn 13.91%
    Mint 13.58%

     

    Flavor
    Bitter 72.53%
    Odorless 31.31%
    Sweet-like 19.91%
    Cedarleaf 19.49%
    Bland 19.44%
    Bread crust 19.22%
    Taco 19.18%
    Roasted 19.16%
    Nitrile 19.15%
    Roasted peanuts 19.1%

     

    Odor impact est.
    Low

    Odor threshold

    • Odor Threshold Low: 0.01 [mmHg]. Odor threshold from "Quick Guide: The Electronic NIOSH Pocket Guide to Chemical Hazards"

  • Properties

    XLogP3-AA
    1.1

    pKa est.
    4.99 (weak acid)

    Molecular weight
    197.02 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Melting point expt.

    • 270 °F (NTP, 1992)
    • 132 °C
    • 270 °F

    Boiling point

    • Sublimes at 212 °F (NTP, 1992)
    • 212 ° (sublimes)

    Flash point

    • 109.81 ˚C est.
    • 346 °F (NIOSH, 2024)
    • 346 °F

    Solubility expt.

    • Reaction (NTP, 1992)
    • Solubility (at 25 °C): 12.5% in carbon tetrachloride, 14% in chloroform, 30% in methylene chloride, 32.0% in ethylene dichloride, 17% in sym-tetrachlorethane, 9.2% in benzene
    • In water, 0.5 g/L at 20 °C; 1.3 g/L at 40 °C.
    • 0.2%

  • Synonyms

    • 1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN
    • 118-52-5
    • Dantoin
    • 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione
    • Dactin
    • Dichlorantin
    • Daktin
    • Halane
    • Omchlor
    • Hydan
    • Hydantoin, dichlorodimethyl-
    • NCI-C03054
    • Hydan (antiseptic)
    • Caswell No. 306
    • 2,4-Imidazolidinedione, 1,3-dichloro-5,5-dimethyl-
    • 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione
    • DCDMH
    • NSC 33307
    • NSC 38630
    • CCRIS 5900
    • HSDB 4373
    • Hydantoin, 1,3-dichloro-5,5-dimethyl-
    • Dantochlor RW
    • UNII-70H8B2WWTU
    • EINECS 204-258-7
    • 70H8B2WWTU
    • MFCD00003190
    • 1,3-Dichloro-5,5-dimethyl hydantoin
    • EPA Pesticide Chemical Code 028501
    • BRN 0146013
    • DTXSID4024985
    • AI3-23669
    • NSC-33307
    • NSC-38630
    • DTXCID604985
    • 5-24-05-00373 (Beilstein Handbook Reference)
    • NSC33307
    • NSC38630
    • 1,3-dichloro-5,5-dimethyl-imidazolidine-2,4-dione
    • 1,3-Dichloro-5,5-dimethylhydantoine
    • DDH
    • J5.299J
    • 1,5-dimethylhydantoin
    • 1,5-dimethyl hydantoin
    • DICHLORO-5,5-DIMETHYLHYDANTOIN, 1,3-
    • 1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN [MI]
    • 1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN [HSDB]
    • Chlorantine
    • Dwuchlorantyny
    • Dwuchlorantyny [Polish]
    • 2, 1,3-dichloro-5,5-dimethyl-
    • Sulfochloranthine
    • Hydantoin,3-dichloro-5,5-dimethyl-
    • WLN: T5NVNV EHJ AG CG E1 E1
    • C5H6Cl2N2O2
    • CAS-118-52-5
    • 1,3-Dichloro-5,5'-methylhydantoin
    • Sulfochlorantine
    • 1,3-Dwuchloro-5,5-dwumetylohydantoina [Polish]
    • 2,4-Imidazolidinedione, 1,3-dichloro-5,5-dimethyl-; N,N'-Dichlorodimethylhydantoin; 1,3-Dichloro-5,5-dimethylhydantoin; 1,3-Dichloro-5,5-dimethyl-imidazolidine-2,4-dione
    • 1,3-dichloro-5,5-dimethyl-hydantoin
    • 1,3-Dwuchloro-5,5-dwumetylohydantoina
    • dichlorodimethylhydantoin
    • 1,3-Dichloro-5,5-dimethylhydantoin (DCDMH)
    • Hydantoin, dichlorodimethyl
    • n,n'-dichlorodimethylhydantoin
    • SCHEMBL123299
    • 1,3-dichloro-dimethylhydantoin
    • dichloro-5,5-dimethylhydantoin
    • 1,3Dichloro5,5'methylhydantoin
    • CHEMBL1899986
    • 1,3Dichloro5,5dimethylhydantoin
    • 1,3Dichloro5,5dimethyl hydantoin
    • 1,3Dwuchloro5,5dwumetylohydantoina
    • Tox21_202384
    • Tox21_300184
    • BBL011089
    • n,n'-dichloro-5,5-dimethylhydantoin
    • STK802311
    • 1 ,3-dichloro-5,5-dimethylhydantoin
    • AKOS000120004
    • AC-1604
    • CS-W018514
    • USEPA/OPP Pesticide Code: 028501
    • NCGC00164351-01
    • NCGC00164351-02
    • NCGC00164351-03
    • NCGC00254084-01
    • NCGC00259933-01
    • FD139410
    • VS-02831
    • DB-041411
    • 1,3Dichloro5,5dimethyl2,4imidazolidinedione
    • D1783
    • NS00006816
    • EN300-19870
    • 2,4Imidazolidinedione, 1,3dichloro5,5dimethyl
    • D77848
    • Hydantoin, 1,3-dichloro-5,5-dimethyl- (8CI)
    • 1,3-Dichloro-5,5-dimethyl-2,4,-imidazolidindione
    • 1,3-Dichloro-5,5-dimethyl hydantoin (ACGIH:OSHA)
    • Q20963665
    • F0001-0296
    • 2,4-Imidazolidinedione, 1,3-dichloro-5,5-dimethyl-(9CI)
    • 1,3-Dichloro-5,5-dimethylhydantoin, available chlorine 68 %
    • 204-258-7

  • Applications

    1,3-Dichloro-5,5-dimethylhydantoin (CAS 118-52-5) is used as a stable solid source of active chlorine that releases chlorine over time for disinfection. Real-world applications include: disinfection of swimming pools and spas; treatment of industrial process waters and cooling-water circuits; sanitation of surfaces in household and industrial cleaning formulations; and it can serve as an intermediate for the synthesis of other chlorine-releasing biocides.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 69.23
    methanol 98.76
    isopropanol 53.57
    water 7.06
    ethyl acetate 115.29
    n-propanol 56.31
    acetone 214.52
    n-butanol 53.46
    acetonitrile 169.26
    DMF 480.57
    toluene 48.91
    isobutanol 45.29
    1,4-dioxane 125.41
    methyl acetate 140.26
    THF 222.44
    2-butanone 133.76
    n-pentanol 48.65
    sec-butanol 57.95
    n-hexane 3.37
    ethylene glycol 47.93
    NMP 540.95
    cyclohexane 4.0
    DMSO 387.89
    n-butyl acetate 64.34
    n-octanol 22.94
    chloroform 373.75
    n-propyl acetate 75.31
    acetic acid 239.68
    dichloromethane 391.44
    cyclohexanone 185.27
    propylene glycol 51.43
    isopropyl acetate 68.38
    DMAc 383.9
    2-ethoxyethanol 103.72
    isopentanol 46.65
    n-heptane 3.59
    ethyl formate 120.65
    1,2-dichloroethane 193.21
    n-hexanol 43.78
    2-methoxyethanol 180.1
    isobutyl acetate 39.73
    tetrachloromethane 33.5
    n-pentyl acetate 45.14
    transcutol 116.99
    n-heptanol 25.04
    ethylbenzene 26.71
    MIBK 64.15
    2-propoxyethanol 100.32
    tert-butanol 67.58
    MTBE 50.25
    2-butoxyethanol 57.39
    propionic acid 98.74
    o-xylene 37.7
    formic acid 193.81
    diethyl ether 52.17
    m-xylene 37.93
    p-xylene 43.41
    chlorobenzene 102.44
    dimethyl carbonate 101.24
    n-octane 1.76
    formamide 266.31
    cyclopentanone 255.13
    2-pentanone 110.08
    anisole 71.47
    cyclopentyl methyl ether 88.58
    gamma-butyrolactone 347.55
    1-methoxy-2-propanol 136.27
    pyridine 199.67
    3-pentanone 89.33
    furfural 397.65
    n-dodecane 1.88
    diethylene glycol 104.97
    diisopropyl ether 15.84
    tert-amyl alcohol 66.46
    acetylacetone 185.81
    n-hexadecane 2.12
    acetophenone 112.37
    methyl propionate 119.05
    isopentyl acetate 51.65
    trichloroethylene 539.52
    n-nonanol 21.81
    cyclohexanol 62.91
    benzyl alcohol 84.54
    2-ethylhexanol 29.3
    isooctanol 20.84
    dipropyl ether 27.49
    1,2-dichlorobenzene 109.25
    ethyl lactate 63.69
    propylene carbonate 215.52
    n-methylformamide 233.48
    2-pentanol 41.06
    n-pentane 4.1
    1-propoxy-2-propanol 67.89
    1-methoxy-2-propyl acetate 79.35
    2-(2-methoxypropoxy) propanol 65.1
    mesitylene 21.43
    ε-caprolactone 167.29
    p-cymene 20.05
    epichlorohydrin 307.89
    1,1,1-trichloroethane 161.39
    2-aminoethanol 64.63
    morpholine-4-carbaldehyde 319.53
    sulfolane 408.24
    2,2,4-trimethylpentane 3.25
    2-methyltetrahydrofuran 139.75
    n-hexyl acetate 53.85
    isooctane 2.17
    2-(2-butoxyethoxy)ethanol 65.18
    sec-butyl acetate 46.21
    tert-butyl acetate 65.41
    decalin 4.16
    glycerin 90.82
    diglyme 123.91
    acrylic acid 138.65
    isopropyl myristate 22.09
    n-butyric acid 107.51
    acetyl acetate 111.41
    di(2-ethylhexyl) phthalate 37.59
    ethyl propionate 72.78
    nitromethane 515.97
    1,2-diethoxyethane 48.59
    benzonitrile 121.47
    trioctyl phosphate 24.85
    1-bromopropane 72.5
    gamma-valerolactone 328.31
    n-decanol 17.25
    triethyl phosphate 40.85
    4-methyl-2-pentanol 25.73
    propionitrile 84.2
    vinylene carbonate 225.06
    1,1,2-trichlorotrifluoroethane 299.22
    DMS 77.85
    cumene 20.03
    2-octanol 19.0
    2-hexanone 77.16
    octyl acetate 30.43
    limonene 27.23
    1,2-dimethoxyethane 155.31
    ethyl orthosilicate 33.75
    tributyl phosphate 30.58
    diacetone alcohol 95.84
    N,N-dimethylaniline 64.32
    acrylonitrile 159.81
    aniline 83.95
    1,3-propanediol 74.84
    bromobenzene 98.91
    dibromomethane 200.57
    1,1,2,2-tetrachloroethane 321.74
    2-methyl-cyclohexyl acetate 50.99
    tetrabutyl urea 46.86
    diisobutyl methanol 17.84
    2-phenylethanol 76.24
    styrene 34.61
    dioctyl adipate 40.08
    dimethyl sulfate 223.14
    ethyl butyrate 55.01
    methyl lactate 100.31
    butyl lactate 48.39
    diethyl carbonate 44.15
    propanediol butyl ether 53.27
    triethyl orthoformate 40.33
    p-tert-butyltoluene 20.09
    methyl 4-tert-butylbenzoate 76.31
    morpholine 160.2
    tert-butylamine 36.54
    n-dodecanol 13.52
    dimethoxymethane 188.09
    ethylene carbonate 148.37
    cyrene 126.49
    2-ethoxyethyl acetate 64.37
    2-ethylhexyl acetate 43.79
    1,2,4-trichlorobenzene 148.72
    4-methylpyridine 204.02
    dibutyl ether 20.23
    2,6-dimethyl-4-heptanol 17.84
    DEF 166.34
    dimethyl isosorbide 131.94
    tetrachloroethylene 194.58
    eugenol 85.45
    triacetin 71.11
    span 80 52.85
    1,4-butanediol 44.71
    1,1-dichloroethane 161.66
    2-methyl-1-pentanol 45.81
    methyl formate 238.32
    2-methyl-1-butanol 49.73
    n-decane 2.68
    butyronitrile 83.93
    3,7-dimethyl-1-octanol 25.48
    1-chlorooctane 14.42
    1-chlorotetradecane 6.58
    n-nonane 2.34
    undecane 2.22
    tert-butylcyclohexane 3.67
    cyclooctane 1.69
    cyclopentanol 83.69
    tetrahydropyran 83.19
    tert-amyl methyl ether 50.46
    2,5,8-trioxanonane 89.37
    1-hexene 16.23
    2-isopropoxyethanol 71.18
    2,2,2-trifluoroethanol 165.96
    methyl butyrate 98.18

    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