Dicumyl peroxide

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  • Identifiers

    CAS number
    80-43-3

    Molecular formula
    C18H22O2

    SMILES
    CC(C)(C1=CC=CC=C1)OOC(C)(C)C2=CC=CC=C2

    Safety labels

    Flammable
    Flammable

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Floral 82.63%
    Green 70.54%
    Rose 47.76%
    Fruity 45.52%
    Earthy 42.72%
    Fresh 41.13%
    Woody 36.36%
    Herbal 34.39%
    Lily 34.01%
    Hyacinth 33.67%

     

    Flavor
    Green 68.51%
    Floral 61.15%
    Fruity 49.08%
    Rose 39.1%
    Bitter 37.23%
    Sweet 34.71%
    Earthy 34.09%
    Citrus 31.55%
    Tropical 30.78%
    Herbal 27.08%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    4.3

    pKa est.
    6.45 (neutral)

    Molecular weight
    270.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • 40 °C
    • 39 °C

    Boiling point

    • 266 °F at 760 mmHg (decomposes) (NTP, 1992)
    • BP: 100 °C at 0.2 mm Hg

    Flash point

    • 130.56 ˚C est.
    • Di-cup r, 160 °F (closed cup); di-cup t, 160 °F (closed cup)
    • 71 °C c.c.

    Solubility expt.

    • less than 1 mg/mL at 73 °F (NTP, 1992)
    • In water, 0.4 mg/L at 25 °C
    • Solubility in water: none

  • Synonyms

    • DICUMYL PEROXIDE
    • 80-43-3
    • Cumene peroxide
    • Cumyl peroxide
    • dicumylperoxide
    • Di-Cup
    • Percumyl D
    • Perkadox B
    • Perkadox BC
    • Perkadox SB
    • Dicumenyl peroxide
    • Peroxide, bis(1-methyl-1-phenylethyl)
    • Percumyl D 40
    • Luperox 500
    • Luperox 500R
    • Luperox 500T
    • Dicumene hydroperoxide
    • Diisopropylbenzene peroxide
    • Kayacumyl D
    • Di-cupr
    • DiCup 40KE
    • Active dicumyl peroxide
    • Di-cup 40C
    • Varox dcp-R
    • Varox dcp-T
    • Isopropylbenzene peroxide
    • Luperco 500-40C
    • Luperco 500-40KE
    • Perkadox BC 9
    • Di-cup R
    • Di-cup T
    • Di-cup 40haf
    • Perkadox BC 40
    • Perkadox BC 95
    • Bis(1-methyl-1-phenylethyl) peroxide
    • Bis(2-phenyl-2-propyl) peroxide
    • NSC 56772
    • Bis(alpha,alpha-dimethylbenzyl)peroxide
    • Bis(alpha,alpha-dimethylbenzyl) peroxide
    • .alpha.-Cumyl peroxide
    • 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene
    • Di-.alpha.-cumyl peroxide
    • M51X2J0U9D
    • DTXSID1025017
    • .alpha.,.alpha.'-Dicumyl peroxide
    • MFCD00036227
    • NSC-56772
    • Dicumyl Peroxide (contains ca. 60% CaCO3)
    • Bis(.alpha.,.alpha.-dimethylbenzyl) peroxide
    • Samperox DCP
    • Perkadox 96
    • Lupersol 500
    • DTXCID605017
    • Di-cup 40ke
    • Dicup 40
    • Dicumyl peroxide, dry
    • Di-Cup 40 KE
    • CAS-80-43-3
    • 1,1'-(dioxydipropane-2,2-diyl)dibenzene
    • CCRIS 4616
    • HSDB 320
    • alpha,alpha-Dimethylbenzyl peroxide
    • EINECS 201-279-3
    • BRN 2056090
    • UNII-M51X2J0U9D
    • Peroxide, bis(alpha,alpha-dimethylbenzyl)
    • Peroximon DC-40
    • Dicumyl peroxide, 98%
    • EC 201-279-3
    • SCHEMBL15450
    • 4-06-00-03225 (Beilstein Handbook Reference)
    • DICUMYL PEROXIDE [HSDB]
    • CHEMBL1519055
    • Peroxide,.alpha.-dimethylbenzyl)
    • NSC56772
    • WLN: 1X1&R&OOX1&1&R
    • bis(1-methyl-1-phenylethyl)peroxide
    • Tox21_202385
    • Tox21_300069
    • AKOS015838411
    • AT42242
    • NCGC00091811-01
    • NCGC00091811-02
    • NCGC00091811-03
    • NCGC00091811-04
    • NCGC00254166-01
    • NCGC00259934-01
    • FD166002
    • DB-056432
    • D4894
    • NS00005939
    • Peroxide, bis(.alpha.,.alpha.-dimethylbenzyl)
    • Q1210367
    • (1-Methyl-1-[(1-methyl-1-phenylethyl)peroxy]ethyl)benzene #
    • Peroxide,4-dichlorobenzoyl)- with phthalic acid, dibutyl ester (1:1)

  • Applications

    Dicumyl peroxide is a thermal radical initiator widely used to start polymerization of vinyl monomers (for example, styrene and acrylates) and unsaturated resins, and to act as a crosslinking agent for polyolefins (notably polyethylene) and elastomers such as EPDM. It is used as a curing/initiating agent in silicone rubbers, unsaturated polyester resins, and in coatings, inks, and adhesive formulations relying on free-radical curing to speed cure and build polymer networks. In the electrical and cable processing field, Dicumyl peroxide is used to crosslink polymers to improve heat resistance and dimensional stability. Depending on local regulations and formulation limits, it may be considered for other high-temperature polymer-processing applications.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 417.86
    methanol 258.58
    isopropanol 353.87
    water 1.1
    ethyl acetate 2541.16
    n-propanol 422.22
    acetone 2370.61
    n-butanol 465.62
    acetonitrile 1599.24
    DMF 3954.07
    toluene 1591.3
    isobutanol 387.8
    1,4-dioxane 2710.2
    methyl acetate 2104.84
    THF 3257.8
    2-butanone 2122.52
    n-pentanol 332.42
    sec-butanol 341.47
    n-hexane 597.2
    ethylene glycol 37.23
    NMP 2395.95
    cyclohexane 907.87
    DMSO 1076.41
    n-butyl acetate 1525.98
    n-octanol 312.12
    chloroform 8347.08
    n-propyl acetate 1543.72
    acetic acid 452.53
    dichloromethane 7810.17
    cyclohexanone 4027.75
    propylene glycol 58.43
    isopropyl acetate 1539.97
    DMAc 3113.3
    2-ethoxyethanol 581.28
    isopentanol 433.25
    n-heptane 293.17
    ethyl formate 1382.23
    1,2-dichloroethane 4495.33
    n-hexanol 410.19
    2-methoxyethanol 769.38
    isobutyl acetate 951.12
    tetrachloromethane 1240.89
    n-pentyl acetate 914.13
    transcutol 1280.34
    n-heptanol 264.03
    ethylbenzene 1177.7
    MIBK 1149.91
    2-propoxyethanol 715.31
    tert-butanol 415.37
    MTBE 1137.32
    2-butoxyethanol 464.4
    propionic acid 528.85
    o-xylene 977.85
    formic acid 107.98
    diethyl ether 1922.38
    m-xylene 984.2
    p-xylene 1585.67
    chlorobenzene 2245.31
    dimethyl carbonate 1196.37
    n-octane 158.46
    formamide 326.87
    cyclopentanone 3712.8
    2-pentanone 2119.98
    anisole 1680.94
    cyclopentyl methyl ether 2118.81
    gamma-butyrolactone 3844.04
    1-methoxy-2-propanol 671.6
    pyridine 2407.98
    3-pentanone 2118.26
    furfural 2568.91
    n-dodecane 93.94
    diethylene glycol 310.81
    diisopropyl ether 683.69
    tert-amyl alcohol 413.19
    acetylacetone 2337.1
    n-hexadecane 113.6
    acetophenone 1568.08
    methyl propionate 2057.47
    isopentyl acetate 1273.04
    trichloroethylene 7143.29
    n-nonanol 301.22
    cyclohexanol 734.24
    benzyl alcohol 668.99
    2-ethylhexanol 421.25
    isooctanol 241.33
    dipropyl ether 1201.07
    1,2-dichlorobenzene 2328.2
    ethyl lactate 450.49
    propylene carbonate 2189.92
    n-methylformamide 1124.37
    2-pentanol 399.4
    n-pentane 286.89
    1-propoxy-2-propanol 580.68
    1-methoxy-2-propyl acetate 1283.73
    2-(2-methoxypropoxy) propanol 467.54
    mesitylene 651.35
    ε-caprolactone 2819.33
    p-cymene 467.01
    epichlorohydrin 3940.87
    1,1,1-trichloroethane 4387.09
    2-aminoethanol 103.41
    morpholine-4-carbaldehyde 2598.75
    sulfolane 2699.9
    2,2,4-trimethylpentane 141.16
    2-methyltetrahydrofuran 2389.14
    n-hexyl acetate 1146.31
    isooctane 98.08
    2-(2-butoxyethoxy)ethanol 529.17
    sec-butyl acetate 1110.93
    tert-butyl acetate 1363.6
    decalin 413.51
    glycerin 101.31
    diglyme 1659.64
    acrylic acid 448.88
    isopropyl myristate 492.47
    n-butyric acid 963.42
    acetyl acetate 1713.57
    di(2-ethylhexyl) phthalate 302.76
    ethyl propionate 1783.76
    nitromethane 2094.19
    1,2-diethoxyethane 1305.63
    benzonitrile 1258.71
    trioctyl phosphate 224.89
    1-bromopropane 2543.38
    gamma-valerolactone 3763.58
    n-decanol 223.71
    triethyl phosphate 609.83
    4-methyl-2-pentanol 262.21
    propionitrile 1290.8
    vinylene carbonate 2239.17
    1,1,2-trichlorotrifluoroethane 1412.81
    DMS 1354.16
    cumene 678.24
    2-octanol 230.47
    2-hexanone 1397.96
    octyl acetate 552.19
    limonene 656.74
    1,2-dimethoxyethane 2147.23
    ethyl orthosilicate 531.41
    tributyl phosphate 354.96
    diacetone alcohol 759.79
    N,N-dimethylaniline 1150.89
    acrylonitrile 1547.63
    aniline 861.91
    1,3-propanediol 238.57
    bromobenzene 2799.08
    dibromomethane 4904.38
    1,1,2,2-tetrachloroethane 5622.1
    2-methyl-cyclohexyl acetate 880.4
    tetrabutyl urea 474.61
    diisobutyl methanol 273.64
    2-phenylethanol 577.35
    styrene 1391.99
    dioctyl adipate 662.93
    dimethyl sulfate 1574.37
    ethyl butyrate 1410.44
    methyl lactate 521.68
    butyl lactate 461.98
    diethyl carbonate 1020.84
    propanediol butyl ether 294.82
    triethyl orthoformate 848.25
    p-tert-butyltoluene 426.8
    methyl 4-tert-butylbenzoate 847.21
    morpholine 2262.81
    tert-butylamine 336.6
    n-dodecanol 180.73
    dimethoxymethane 2073.67
    ethylene carbonate 2039.47
    cyrene 571.81
    2-ethoxyethyl acetate 1051.35
    2-ethylhexyl acetate 1158.5
    1,2,4-trichlorobenzene 2246.39
    4-methylpyridine 2983.11
    dibutyl ether 997.71
    2,6-dimethyl-4-heptanol 273.64
    DEF 2702.75
    dimethyl isosorbide 1141.12
    tetrachloroethylene 3492.87
    eugenol 579.27
    triacetin 1021.43
    span 80 399.03
    1,4-butanediol 111.54
    1,1-dichloroethane 4152.35
    2-methyl-1-pentanol 345.01
    methyl formate 1191.77
    2-methyl-1-butanol 427.72
    n-decane 182.08
    butyronitrile 1332.24
    3,7-dimethyl-1-octanol 332.01
    1-chlorooctane 601.3
    1-chlorotetradecane 222.44
    n-nonane 191.55
    undecane 122.16
    tert-butylcyclohexane 315.94
    cyclooctane 353.78
    cyclopentanol 682.8
    tetrahydropyran 2796.02
    tert-amyl methyl ether 1004.31
    2,5,8-trioxanonane 888.85
    1-hexene 1095.51
    2-isopropoxyethanol 473.72
    2,2,2-trifluoroethanol 333.74
    methyl butyrate 2241.16

    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