Cuprous iodide

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  • Identifiers

    CAS number
    7681-65-4

    Molecular formula
    CuI

    SMILES
    [Cu+].[I-]

    Safety labels

  • Odor profile

  • Properties

    pKa est.
    -39.39 (strong acid)

    Molecular weight
    190.45 g/mol

    Melting point expt.

    • 606 °C

    Boiling point

    • About 1290 °C

    Flash point

    • 0.28 ˚C est.

    Solubility expt.

    • Insoluble in dilute acid solutions
    • Dissolves in ammonia solution, alkali iodide and cyanide solutions, and dilute hydrochloric acid
    • Soluble in ammonia and potassium iodide solutions; insoluble in water
    • 0.008 g/100 cc water @ 18 °C

  • Synonyms

    • Copper(1+) iodide
    • Marshite
    • Hydro-Giene
    • Copper monoiodide
    • Copper iodide (cui)
    • DTXSID5041803
    • 7DE9CA6IL2
    • DTXCID3021803
    • 231-674-6
    • Cuprum Iodatum
    • RefChem:58181
    • 7681-65-4
    • Copper (I) iodide
    • Copper(I) iodide
    • Cuprous iodide
    • iodocopper
    • Natural marshite
    • Copper(l)iodide
    • Copper(l) iodide
    • SCHEMBL2387
    • CUPROUS IODIDE [MI]
    • COPPER(I) IODIDE [HSDB]
    • Tox21_300719
    • AKOS022183837
    • FC34047
    • NCGC00254625-01
    • CAS-7681-65-4
    • C2163
    • NS00074350
    • Copper(I) iodide (99.999%-Cu) PURATREM
    • D78015
    • F044771
    • 7681-65-4

  • Applications

    Cuprous iodide (CAS 7681-65-4) is used primarily as a catalyst and reagent in organic synthesis, notably in copper(I)-catalyzed cross-coupling reactions and CuAAC click chemistry; it acts as a catalyst for controlled radical polymerizations such as ATRP to prepare well-defined polymers; it serves as a precursor for copper-containing materials used in electronics and optoelectronics, including p-type semiconductor materials and related thin films; it is also used as a component in coatings and conductive inks where copper iodide can be incorporated; use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 172.8
    methanol 193.7
    isopropanol 121.74
    water 5.44
    ethyl acetate 90.03
    n-propanol 118.81
    acetone 180.16
    n-butanol 108.01
    acetonitrile 108.86
    DMF 378.56
    toluene 46.78
    isobutanol 82.87
    1,4-dioxane 210.65
    methyl acetate 106.81
    THF 237.02
    2-butanone 121.64
    n-pentanol 86.79
    sec-butanol 99.74
    n-hexane 20.33
    ethylene glycol 91.1
    NMP 310.84
    cyclohexane 24.18
    DMSO 316.08
    n-butyl acetate 81.07
    n-octanol 72.84
    chloroform 133.86
    n-propyl acetate 71.78
    acetic acid 156.93
    dichloromethane 115.29
    cyclohexanone 159.35
    propylene glycol 68.02
    isopropyl acetate 58.26
    DMAc 224.56
    2-ethoxyethanol 127.36
    isopentanol 86.79
    n-heptane 21.15
    ethyl formate 68.67
    1,2-dichloroethane 95.51
    n-hexanol 100.4
    2-methoxyethanol 211.62
    isobutyl acetate 48.44
    tetrachloromethane 35.2
    n-pentyl acetate 65.94
    transcutol 374.32
    n-heptanol 63.69
    ethylbenzene 32.22
    MIBK 72.56
    2-propoxyethanol 154.44
    tert-butanol 129.68
    MTBE 98.42
    2-butoxyethanol 105.64
    propionic acid 105.26
    o-xylene 45.66
    formic acid 74.95
    diethyl ether 109.96
    m-xylene 41.41
    p-xylene 41.71
    chlorobenzene 65.12
    dimethyl carbonate 54.85
    n-octane 11.09
    formamide 104.01
    cyclopentanone 206.58
    2-pentanone 108.42
    anisole 79.63
    cyclopentyl methyl ether 122.33
    gamma-butyrolactone 201.01
    1-methoxy-2-propanol 158.04
    pyridine 118.17
    3-pentanone 84.46
    furfural 170.92
    n-dodecane 11.08
    diethylene glycol 153.84
    diisopropyl ether 42.83
    tert-amyl alcohol 107.39
    acetylacetone 118.37
    n-hexadecane 12.11
    acetophenone 77.9
    methyl propionate 85.83
    isopentyl acetate 71.47
    trichloroethylene 153.98
    n-nonanol 61.23
    cyclohexanol 95.7
    benzyl alcohol 68.21
    2-ethylhexanol 65.01
    isooctanol 51.53
    dipropyl ether 68.17
    1,2-dichlorobenzene 66.59
    ethyl lactate 47.67
    propylene carbonate 103.56
    n-methylformamide 136.47
    2-pentanol 84.39
    n-pentane 25.01
    1-propoxy-2-propanol 112.16
    1-methoxy-2-propyl acetate 86.34
    2-(2-methoxypropoxy) propanol 105.36
    mesitylene 32.3
    ε-caprolactone 131.46
    p-cymene 31.94
    epichlorohydrin 155.26
    1,1,1-trichloroethane 85.68
    2-aminoethanol 107.36
    morpholine-4-carbaldehyde 254.75
    sulfolane 232.24
    2,2,4-trimethylpentane 14.03
    2-methyltetrahydrofuran 166.0
    n-hexyl acetate 91.15
    isooctane 11.5
    2-(2-butoxyethoxy)ethanol 146.17
    sec-butyl acetate 48.92
    tert-butyl acetate 74.18
    decalin 16.02
    glycerin 106.77
    diglyme 236.83
    acrylic acid 110.11
    isopropyl myristate 44.74
    n-butyric acid 100.51
    acetyl acetate 63.43
    di(2-ethylhexyl) phthalate 41.82
    ethyl propionate 59.66
    nitromethane 204.1
    1,2-diethoxyethane 117.14
    benzonitrile 77.08
    trioctyl phosphate 36.23
    1-bromopropane 65.24
    gamma-valerolactone 221.03
    n-decanol 48.96
    triethyl phosphate 38.9
    4-methyl-2-pentanol 52.93
    propionitrile 78.22
    vinylene carbonate 92.65
    1,1,2-trichlorotrifluoroethane 130.74
    DMS 72.51
    cumene 27.34
    2-octanol 50.17
    2-hexanone 82.99
    octyl acetate 54.81
    limonene 50.13
    1,2-dimethoxyethane 175.5
    ethyl orthosilicate 38.86
    tributyl phosphate 41.38
    diacetone alcohol 109.5
    N,N-dimethylaniline 65.69
    acrylonitrile 100.51
    aniline 67.2
    1,3-propanediol 124.79
    bromobenzene 60.51
    dibromomethane 87.52
    1,1,2,2-tetrachloroethane 121.88
    2-methyl-cyclohexyl acetate 54.98
    tetrabutyl urea 61.0
    diisobutyl methanol 43.75
    2-phenylethanol 75.09
    styrene 40.6
    dioctyl adipate 57.94
    dimethyl sulfate 94.19
    ethyl butyrate 58.5
    methyl lactate 67.56
    butyl lactate 57.81
    diethyl carbonate 43.01
    propanediol butyl ether 109.02
    triethyl orthoformate 48.84
    p-tert-butyltoluene 32.27
    methyl 4-tert-butylbenzoate 79.45
    morpholine 212.14
    tert-butylamine 87.37
    n-dodecanol 40.5
    dimethoxymethane 157.76
    ethylene carbonate 73.07
    cyrene 95.89
    2-ethoxyethyl acetate 91.72
    2-ethylhexyl acetate 61.69
    1,2,4-trichlorobenzene 80.34
    4-methylpyridine 112.53
    dibutyl ether 67.09
    2,6-dimethyl-4-heptanol 43.75
    DEF 138.48
    dimethyl isosorbide 143.5
    tetrachloroethylene 91.98
    eugenol 86.04
    triacetin 87.57
    span 80 96.28
    1,4-butanediol 64.11
    1,1-dichloroethane 88.69
    2-methyl-1-pentanol 71.09
    methyl formate 103.2
    2-methyl-1-butanol 83.07
    n-decane 15.55
    butyronitrile 73.65
    3,7-dimethyl-1-octanol 59.54
    1-chlorooctane 46.15
    1-chlorotetradecane 22.78
    n-nonane 15.79
    undecane 12.71
    tert-butylcyclohexane 16.35
    cyclooctane 11.25
    cyclopentanol 115.49
    tetrahydropyran 153.63
    tert-amyl methyl ether 83.46
    2,5,8-trioxanonane 173.36
    1-hexene 50.15
    2-isopropoxyethanol 95.43
    2,2,2-trifluoroethanol 64.24
    methyl butyrate 77.35

    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