Mercuric iodide

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  • Identifiers

    CAS number
    7774-29-0

    Molecular formula
    HgI2

    SMILES
    I[Hg]I

    Safety labels

    Acute Toxic
    Acute Toxic

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Fishy 39.65%
    Odorless 39.32%
    Sulfurous 39.15%
    Meaty 35.37%
    Cheesy 30.33%
    Ripe 24.61%
    Vegetable 24.43%
    Savory 23.99%
    Onion 23.1%
    Garlic 21.43%

     

  • Properties

    pKa est.
    -152.51 (strong acid)

    Molecular weight
    454.4 g/mol

    Melting point expt.

    • 259 °C

    Boiling point

    • 350 °C

    Flash point

    • 489.35 ˚C est.

    Solubility expt.

    • 0.006 g/100 g water @ 25 °C
    • 1 g/115 ml alcohol; 1 g/20 ml boiling alcohol; 1 g/120 ml ether; 1 g/60 ml acetone; 1 g/910 ml chloroform; 1 g/75 ml ethyl acetate; 1 g/260 ml carbon disulfide; 1 g/230 ml olive oil; 1 g/50 ml castor oil
    • 1 g dissolves readily in alkali iodides, mercuric chloride, Na2S2O3
    • Soluble in boiling water and in solutions of sodium thiosulfate or potassium iodide or other hot alkali chloride solutions; almost completely insoluble in water.

  • Synonyms

    • MERCURIC IODIDE
    • Mercury(II) iodide
    • Mercury diiodide
    • diiodomercury
    • 7774-29-0
    • HgI2
    • Red mercuric iodide
    • Hydrargyrum diodatum
    • Mercuric iodide, red
    • alpha-Mercury(II) iodide
    • Hydrargyrum bijodatum
    • MERCURY (II) IODIDE
    • HSDB 1211
    • EINECS 231-873-8
    • UNII-R03O05RB0P
    • mercury(2+) diiodide
    • MFCD00011044
    • R03O05RB0P
    • Mercury biniodide
    • Mercurius bijodatus
    • Hydrargyrum bijodatum [German]
    • iodure mercurique
    • iodeto de mercurio
    • ioduro di mercurio
    • yoduro de mercurio
    • mercury(2+) iodide
    • Mercuty (II) iodide
    • Sore Throat Left Side
    • Mercury(II) iodide red
    • Mercury(II) iodate, 99%
    • Mercury(II) iodide, anhydrous
    • CHEBI:49659
    • AKOS015902935
    • DB04445
    • FM34860
    • Mercury(II) iodide, ACS reagent, >=99.0%
    • Mercury(II) iodide red, puriss., red, >=99%
    • Mercury(II) iodide, 99.999% trace metals basis
    • Mercury(II) iodide, p.a., ACS reagent, 99.0%
    • Q414632
    • Mercury(II) iodide red, ACS reagent, >=99.0% dry basis
    • Mercury(II) iodide red, purum p.a., red, >=99.0% (RT)
    • Mercury(II) iodide red, puriss. p.a., ACS reagent, red, >=99.0% (RT)
    • Mercury(II) iodide, anhydrous, beads, -10 mesh, 99.999% trace metals basis

  • Applications

    Mercuric iodide (CAS 7774-29-0) is primarily used as a high-density, room-temperature semiconductor crystal for X-ray and gamma-ray detectors in electronics and nuclear instrumentation; it also serves as a material for crystal-growth research and for developing sensors and dosimetry devices; it acts as a precursor for specialty mercury-iodide compounds and related inorganic materials in laboratory synthesis; and it may be evaluated as a reagent in analytical chemistry for iodide-containing systems, all under strict handling and in compliance with local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1212.63
    methanol 1267.44
    isopropanol 1134.64
    water 26.25
    ethyl acetate 886.87
    n-propanol 932.24
    acetone 1693.12
    n-butanol 1025.81
    acetonitrile 636.5
    DMF 3123.81
    toluene 750.83
    isobutanol 740.86
    1,4-dioxane 2002.18
    methyl acetate 764.96
    THF 3657.89
    2-butanone 1029.9
    n-pentanol 776.25
    sec-butanol 886.06
    n-hexane 318.76
    ethylene glycol 521.56
    NMP 2218.06
    cyclohexane 446.47
    DMSO 2869.32
    n-butyl acetate 777.89
    n-octanol 701.5
    chloroform 1863.26
    n-propyl acetate 643.81
    acetic acid 1116.19
    dichloromethane 1513.37
    cyclohexanone 1564.07
    propylene glycol 610.87
    isopropyl acetate 743.18
    DMAc 1724.78
    2-ethoxyethanol 1120.05
    isopentanol 849.92
    n-heptane 362.12
    ethyl formate 698.17
    1,2-dichloroethane 1165.51
    n-hexanol 959.22
    2-methoxyethanol 1958.29
    isobutyl acetate 507.74
    tetrachloromethane 689.77
    n-pentyl acetate 769.76
    transcutol 2044.03
    n-heptanol 746.35
    ethylbenzene 439.44
    MIBK 886.41
    2-propoxyethanol 1465.03
    tert-butanol 1331.32
    MTBE 1003.07
    2-butoxyethanol 1075.84
    propionic acid 684.2
    o-xylene 547.54
    formic acid 503.94
    diethyl ether 1135.49
    m-xylene 632.51
    p-xylene 525.55
    chlorobenzene 856.2
    dimethyl carbonate 652.06
    n-octane 201.13
    formamide 675.76
    cyclopentanone 2046.36
    2-pentanone 1194.13
    anisole 852.37
    cyclopentyl methyl ether 1583.1
    gamma-butyrolactone 1763.5
    1-methoxy-2-propanol 1772.14
    pyridine 1286.93
    3-pentanone 818.58
    furfural 1806.49
    n-dodecane 164.16
    diethylene glycol 1307.29
    diisopropyl ether 564.46
    tert-amyl alcohol 979.57
    acetylacetone 1333.9
    n-hexadecane 178.71
    acetophenone 761.78
    methyl propionate 792.39
    isopentyl acetate 709.21
    trichloroethylene 1773.55
    n-nonanol 626.5
    cyclohexanol 1046.08
    benzyl alcohol 742.75
    2-ethylhexanol 619.16
    isooctanol 601.59
    dipropyl ether 812.34
    1,2-dichlorobenzene 793.39
    ethyl lactate 474.02
    propylene carbonate 1100.72
    n-methylformamide 1072.1
    2-pentanol 877.96
    n-pentane 393.04
    1-propoxy-2-propanol 1185.74
    1-methoxy-2-propyl acetate 887.69
    2-(2-methoxypropoxy) propanol 780.63
    mesitylene 497.78
    ε-caprolactone 1196.16
    p-cymene 381.94
    epichlorohydrin 1805.61
    1,1,1-trichloroethane 1280.53
    2-aminoethanol 730.36
    morpholine-4-carbaldehyde 2188.79
    sulfolane 2457.83
    2,2,4-trimethylpentane 213.89
    2-methyltetrahydrofuran 1936.04
    n-hexyl acetate 874.42
    isooctane 229.17
    2-(2-butoxyethoxy)ethanol 1138.94
    sec-butyl acetate 500.83
    tert-butyl acetate 957.32
    decalin 231.96
    glycerin 910.02
    diglyme 1809.36
    acrylic acid 690.53
    isopropyl myristate 467.69
    n-butyric acid 1001.37
    acetyl acetate 708.74
    di(2-ethylhexyl) phthalate 445.9
    ethyl propionate 584.86
    nitromethane 1295.69
    1,2-diethoxyethane 929.58
    benzonitrile 754.73
    trioctyl phosphate 380.42
    1-bromopropane 828.51
    gamma-valerolactone 2223.19
    n-decanol 501.23
    triethyl phosphate 403.95
    4-methyl-2-pentanol 606.19
    propionitrile 602.2
    vinylene carbonate 962.73
    1,1,2-trichlorotrifluoroethane 1477.26
    DMS 594.31
    cumene 349.77
    2-octanol 627.3
    2-hexanone 789.75
    octyl acetate 574.48
    limonene 576.57
    1,2-dimethoxyethane 1668.77
    ethyl orthosilicate 421.0
    tributyl phosphate 392.33
    diacetone alcohol 1125.27
    N,N-dimethylaniline 709.17
    acrylonitrile 702.53
    aniline 820.85
    1,3-propanediol 1012.13
    bromobenzene 876.82
    dibromomethane 1182.68
    1,1,2,2-tetrachloroethane 1578.15
    2-methyl-cyclohexyl acetate 580.69
    tetrabutyl urea 553.48
    diisobutyl methanol 498.83
    2-phenylethanol 796.72
    styrene 541.82
    dioctyl adipate 583.94
    dimethyl sulfate 1042.96
    ethyl butyrate 628.52
    methyl lactate 700.29
    butyl lactate 647.28
    diethyl carbonate 445.0
    propanediol butyl ether 1016.13
    triethyl orthoformate 550.01
    p-tert-butyltoluene 430.05
    methyl 4-tert-butylbenzoate 886.51
    morpholine 2109.76
    tert-butylamine 933.56
    n-dodecanol 422.93
    dimethoxymethane 2037.53
    ethylene carbonate 828.55
    cyrene 931.37
    2-ethoxyethyl acetate 850.98
    2-ethylhexyl acetate 628.68
    1,2,4-trichlorobenzene 926.97
    4-methylpyridine 1275.79
    dibutyl ether 640.89
    2,6-dimethyl-4-heptanol 498.83
    DEF 1248.48
    dimethyl isosorbide 1300.36
    tetrachloroethylene 1166.24
    eugenol 901.09
    triacetin 745.2
    span 80 942.5
    1,4-butanediol 546.41
    1,1-dichloroethane 1164.16
    2-methyl-1-pentanol 650.53
    methyl formate 918.18
    2-methyl-1-butanol 746.47
    n-decane 235.45
    butyronitrile 730.14
    3,7-dimethyl-1-octanol 563.35
    1-chlorooctane 510.61
    1-chlorotetradecane 284.4
    n-nonane 238.31
    undecane 190.1
    tert-butylcyclohexane 258.86
    cyclooctane 234.93
    cyclopentanol 1218.1
    tetrahydropyran 1713.34
    tert-amyl methyl ether 848.6
    2,5,8-trioxanonane 1324.71
    1-hexene 580.65
    2-isopropoxyethanol 866.14
    2,2,2-trifluoroethanol 540.01
    methyl butyrate 737.75

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
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Rinse-off products applied to the hair with some hand contact
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Category 2
Products applied to the axillae
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Leave-on products applied to the hair with some hand contact
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Category 3
Products applied to the face/body using fingertips
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Products with significant anogenital exposure
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Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
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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