Perchloric Acid

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  • Identifiers

    CAS number
    7601-90-3

    Molecular formula
    ClHO4

    SMILES
    OCl(=O)(=O)=O

    Safety labels

    Oxidizer
    Oxidizer

    Corrosive
    Corrosive

  • Odor profile

    Fragrance
    Odorless 63.75%
    Sweet 27.67%
    Balsamic 19.13%
    Clean 18.18%
    Alcoholic 16.38%
    Fishy 15.76%
    Musty 15.36%
    Oily 14.38%
    Dry 14.33%
    Woody 14.23%

     

    Flavor
    Odorless 67.78%
    Mild 22.87%
    Sweet-like 21.66%
    Very slight 19.61%
    Rotten 19.34%
    Bland 19.29%
    Mousy 19.01%
    Formyl 18.64%
    Yeast 18.23%
    Soy 18.18%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.3

    pKa est.
    2.55 (strong acid)

    Molecular weight
    100.46 g/mol

    Melting point expt.

    • -170 °F (USCG, 1999)
    • -112 °C

    Boiling point

    • 19 °C @ 11 MM HG

    Flash point

    • 146.36 ˚C est.

    Solubility expt.

    • MISCIBLE IN COLD WATER
    • Solubility in water: miscible

  • Synonyms

    • PERCHLORIC ACID
    • 7601-90-3
    • Perchlorsaeure
    • Ueberchlorsaeure
    • CHEBI:29221
    • HSDB 1140
    • EINECS 231-512-4
    • UNII-V561V90BG2
    • HClO4
    • hydroxidotrioxidochlorine
    • V561V90BG2
    • MFCD00011325
    • Perchloric Acid (70%)
    • UN1873
    • DTXSID8047004
    • PERCHLORIC ACID (HCLO4)
    • EC 231-512-4
    • 0.5N Perchloric Acid
    • Perchloric Acid (60%)
    • (ClO3(OH))
    • [ClO3(OH)]
    • Perchloric acid, ACS reagent, 70%
    • UN1802
    • perchioric acid
    • Perchloric acid (8CI, 9CI, ACI); Perchloric acid (HClO4)
    • LCP
    • Perchloric acid, 0.1 M
    • Perchloric acid, >72% acid by mass [Forbidden]
    • PERCHLORIC ACID [MI]
    • PERCHLORIC ACID [HSDB]
    • CHEMBL1161634
    • DTXCID6027004
    • Perchloric acid, AR, >=70%
    • Perchloric acid, JIS special grade
    • BDBM50147626
    • Perchloric acid, 70%, ACS reagent
    • Perchloric acid, ACS reagent, 60%
    • Perchloric acid, >72% acid by mass
    • AKOS015843797
    • Perchloric acid, puriss. p.a., 20%
    • UN 1802
    • Perchloric acid, >50% but not >72% acid, by mass [UN1873] [Oxidizer, Corrosive]
    • Perchloric acid, not >50% acid, by mass
    • NS00082524
    • H12019
    • Perchloric acid, SAJ first grade, 60.0-62.0%
    • Q193956
    • Perchloric acid, JIS special grade, 60.0-62.0%
    • Perchloric acid, >50% but not >72% acid, by mass
    • Perchloric acid, 70%, 99.999% trace metals basis
    • Perchloric acid, 70%, purified by double-distillation
    • Q27110061
    • Perchloric acid, SAJ super special grade, 60.0-62.0%
    • Perchloric acid, 99.05 wt. % in dilute acetic acid, 0.1 M in acetic acid
    • Perchloric acid, not >50% acid, by mass [UN1802] [Corrosive, Oxidizer]
    • Perchloric acid, suitable for determination of toxic metals, 60.0-62.0%
    • Perchloric acid, p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0%
    • Perchloric acid, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0%
    • 231-512-4
    • Perchloric acid, puriss. p.a., ACS reagent, 70% (Hg <=0.0000005%), packed in coated, shock- and leak-protected glass bottle, >=69% (T)
    • Perchloric acid, puriss. p.a., ACS reagent, packed in coated, shock- and leak-protected glass bottle, >=60% (T)

  • Applications

    Perchloric Acid, CAS 7601-90-3, is a strong mineral acid and a potent oxidizer used as an oxidizing agent in selective organic syntheses and as a reagent for sample digestion in analytical chemistry. In industry and laboratories, it is used for cleaning and surface preparation of metal equipment and glassware, removing oxides and residues. It also serves as an etchant and surface conditioner in electronics and semiconductor manufacturing. Additionally, it participates in the production of perchlorate salts and other specialty oxidants for specific industrial applications, and is used for sample preparation and analysis in environmental and materials analysis.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 176.99
    methanol 330.67
    isopropanol 145.36
    water 357.77
    ethyl acetate 62.74
    n-propanol 114.6
    acetone 259.54
    n-butanol 83.69
    acetonitrile 168.95
    DMF 913.97
    toluene 36.0
    isobutanol 84.97
    1,4-dioxane 226.21
    methyl acetate 103.57
    THF 224.66
    2-butanone 117.44
    n-pentanol 58.35
    sec-butanol 88.35
    n-hexane 20.04
    ethylene glycol 183.6
    NMP 477.34
    cyclohexane 30.67
    DMSO 854.17
    n-butyl acetate 34.03
    n-octanol 39.7
    chloroform 40.48
    n-propyl acetate 46.97
    acetic acid 134.2
    dichloromethane 79.01
    cyclohexanone 112.4
    propylene glycol 105.48
    isopropyl acetate 43.78
    DMAc 650.22
    2-ethoxyethanol 171.46
    isopentanol 66.63
    n-heptane 16.83
    ethyl formate 86.85
    1,2-dichloroethane 93.24
    n-hexanol 40.75
    2-methoxyethanol 313.43
    isobutyl acetate 25.1
    tetrachloromethane 14.11
    n-pentyl acetate 32.23
    transcutol 166.3
    n-heptanol 32.17
    ethylbenzene 21.86
    MIBK 54.09
    2-propoxyethanol 114.62
    tert-butanol 163.4
    MTBE 91.33
    2-butoxyethanol 70.45
    propionic acid 91.39
    o-xylene 41.16
    formic acid 208.18
    diethyl ether 111.86
    m-xylene 30.72
    p-xylene 27.53
    chlorobenzene 23.51
    dimethyl carbonate 97.31
    n-octane 8.63
    formamide 315.94
    cyclopentanone 150.38
    2-pentanone 83.6
    anisole 58.45
    cyclopentyl methyl ether 98.79
    gamma-butyrolactone 163.27
    1-methoxy-2-propanol 211.47
    pyridine 105.19
    3-pentanone 84.13
    furfural 171.2
    n-dodecane 7.02
    diethylene glycol 150.08
    diisopropyl ether 35.51
    tert-amyl alcohol 97.45
    acetylacetone 95.92
    n-hexadecane 7.34
    acetophenone 61.24
    methyl propionate 89.79
    isopentyl acetate 26.57
    trichloroethylene 64.33
    n-nonanol 36.49
    cyclohexanol 72.97
    benzyl alcohol 58.34
    2-ethylhexanol 25.28
    isooctanol 24.02
    dipropyl ether 52.86
    1,2-dichlorobenzene 24.68
    ethyl lactate 49.86
    propylene carbonate 70.39
    n-methylformamide 326.95
    2-pentanol 61.41
    n-pentane 29.87
    1-propoxy-2-propanol 75.98
    1-methoxy-2-propyl acetate 51.13
    2-(2-methoxypropoxy) propanol 81.24
    mesitylene 25.65
    ε-caprolactone 85.95
    p-cymene 18.07
    epichlorohydrin 136.98
    1,1,1-trichloroethane 30.9
    2-aminoethanol 179.11
    morpholine-4-carbaldehyde 393.34
    sulfolane 248.06
    2,2,4-trimethylpentane 9.28
    2-methyltetrahydrofuran 113.2
    n-hexyl acetate 39.63
    isooctane 7.12
    2-(2-butoxyethoxy)ethanol 89.98
    sec-butyl acetate 27.12
    tert-butyl acetate 44.56
    decalin 9.7
    glycerin 171.93
    diglyme 168.18
    acrylic acid 103.77
    isopropyl myristate 24.35
    n-butyric acid 64.49
    acetyl acetate 42.03
    di(2-ethylhexyl) phthalate 27.47
    ethyl propionate 52.26
    nitromethane 272.55
    1,2-diethoxyethane 65.94
    benzonitrile 46.63
    trioctyl phosphate 22.34
    1-bromopropane 53.17
    gamma-valerolactone 199.71
    n-decanol 30.1
    triethyl phosphate 30.48
    4-methyl-2-pentanol 35.86
    propionitrile 93.04
    vinylene carbonate 72.69
    1,1,2-trichlorotrifluoroethane 113.25
    DMS 47.03
    cumene 19.86
    2-octanol 26.17
    2-hexanone 52.18
    octyl acetate 31.15
    limonene 24.68
    1,2-dimethoxyethane 289.77
    ethyl orthosilicate 28.6
    tributyl phosphate 24.52
    diacetone alcohol 76.15
    N,N-dimethylaniline 76.57
    acrylonitrile 126.73
    aniline 66.98
    1,3-propanediol 146.49
    bromobenzene 18.49
    dibromomethane 58.0
    1,1,2,2-tetrachloroethane 65.84
    2-methyl-cyclohexyl acetate 28.96
    tetrabutyl urea 51.28
    diisobutyl methanol 22.09
    2-phenylethanol 38.84
    styrene 25.5
    dioctyl adipate 37.16
    dimethyl sulfate 174.41
    ethyl butyrate 38.91
    methyl lactate 98.04
    butyl lactate 37.72
    diethyl carbonate 31.12
    propanediol butyl ether 68.78
    triethyl orthoformate 35.0
    p-tert-butyltoluene 18.43
    methyl 4-tert-butylbenzoate 59.18
    morpholine 226.7
    tert-butylamine 104.37
    n-dodecanol 25.99
    dimethoxymethane 339.53
    ethylene carbonate 64.98
    cyrene 87.78
    2-ethoxyethyl acetate 43.34
    2-ethylhexyl acetate 22.65
    1,2,4-trichlorobenzene 27.65
    4-methylpyridine 100.18
    dibutyl ether 35.37
    2,6-dimethyl-4-heptanol 22.09
    DEF 173.26
    dimethyl isosorbide 96.23
    tetrachloroethylene 52.33
    eugenol 65.05
    triacetin 50.64
    span 80 58.65
    1,4-butanediol 80.7
    1,1-dichloroethane 52.78
    2-methyl-1-pentanol 41.31
    methyl formate 242.2
    2-methyl-1-butanol 62.62
    n-decane 9.75
    butyronitrile 66.87
    3,7-dimethyl-1-octanol 29.33
    1-chlorooctane 19.83
    1-chlorotetradecane 11.99
    n-nonane 9.98
    undecane 8.01
    tert-butylcyclohexane 7.81
    cyclooctane 14.0
    cyclopentanol 93.47
    tetrahydropyran 114.62
    tert-amyl methyl ether 72.86
    2,5,8-trioxanonane 140.73
    1-hexene 31.99
    2-isopropoxyethanol 99.63
    2,2,2-trifluoroethanol 105.86
    methyl butyrate 64.65

    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