Monopotassium methyldithiocarbamate

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  • Identifiers

    CAS number
    137-41-7

    Molecular formula
    C2H4KNS2

    SMILES
    CNC(=S)[S-].[K+]

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Sulfurous 59.77%
    Meaty 42.14%
    Odorless 39.18%
    Savory 34.97%
    Onion 32.81%
    Garlic 32.42%
    Cheesy 30.88%
    Pungent 30.64%
    Roasted 30.19%
    Cooked 29.7%

     

    Flavor
    Sulfurous 29.9%
    Odorless 29.82%
    Roasted 27.63%
    Sulfury 26.71%
    Onion 26.36%
    Cooked 26.12%
    Mustard 25.44%
    Garlic 24.66%
    Sulfur 22.51%
    Pungent 21.43%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    6.66 (neutral)

    Molecular weight
    145.29 g/mol

    Flash point

    • 65.39 ˚C est.

  • Synonyms

    • Monopotassium methyldithiocarbamate
    • RefChem:156779
    • Metam-potassium
    • 137-41-7
    • POTASSIUM N-METHYLDITHIOCARBAMATE
    • Potassium methyldithiocarbamate
    • Metam potassium
    • Metam-potassium [ISO]
    • Carbamodithioic acid, methyl-, monopotassium salt
    • potassium;N-methylcarbamodithioate
    • Carbamic acid, methyldithio-, monopotassium salt
    • Monopotassium methylcarbamodithioate
    • 8AL3E5450Y
    • Carbamic acid, N-methyldithio-, potassium salt
    • Caswell No. 696
    • Potassiummethyldithiocarbamate
    • EINECS 205-292-5
    • EPA Pesticide Chemical Code 039002
    • UNII-8AL3E5450Y
    • SCHEMBL202666
    • potassium methylcarbamodithioate
    • DTXSID1034424
    • DQRQIQZHRCRSDB-UHFFFAOYSA-M
    • AKOS015914592
    • NS00079170
    • 137P417
    • CARBAMIC ACID, METHYLDITHIO-, POTASSIUM SALT
    • Q21045317
    • 137-41-7

  • Applications

    Monopotassium methyldithiocarbamate (CAS 137-41-7) is primarily used as a polymer stabilizer, particularly in PVC, to mitigate thermal degradation during processing. It also functions as a chelating agent to sequester metal ions in cleaning formulations and industrial systems, improving formulation stability and metal control. It is commonly employed as an intermediate in the synthesis of other dithiocarbamate derivatives for rubber vulcanization systems and protective coatings. In coatings and related finishing processes, it can act as a chelating ligand or complexing agent, supporting pigment dispersion and metal–ligand chemistry in formulated systems.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 53.57
    methanol 86.61
    isopropanol 38.98
    water 5.31
    ethyl acetate 60.98
    n-propanol 38.12
    acetone 190.95
    n-butanol 34.1
    acetonitrile 103.97
    DMF 501.96
    toluene 22.3
    isobutanol 26.15
    1,4-dioxane 146.59
    methyl acetate 92.85
    THF 161.24
    2-butanone 101.73
    n-pentanol 26.39
    sec-butanol 30.12
    n-hexane 0.5
    ethylene glycol 50.6
    NMP 362.54
    cyclohexane 2.16
    DMSO 493.02
    n-butyl acetate 43.69
    n-octanol 18.62
    chloroform 77.65
    n-propyl acetate 37.63
    acetic acid 129.49
    dichloromethane 69.63
    cyclohexanone 111.46
    propylene glycol 36.02
    isopropyl acetate 40.09
    DMAc 382.12
    2-ethoxyethanol 85.78
    isopentanol 26.92
    n-heptane 2.67
    ethyl formate 66.69
    1,2-dichloroethane 54.85
    n-hexanol 27.75
    2-methoxyethanol 158.37
    isobutyl acetate 24.3
    tetrachloromethane 20.16
    n-pentyl acetate 33.52
    transcutol 153.15
    n-heptanol 20.62
    ethylbenzene 8.95
    MIBK 38.82
    2-propoxyethanol 79.9
    tert-butanol 53.72
    MTBE 40.74
    2-butoxyethanol 53.89
    propionic acid 53.09
    o-xylene 19.97
    formic acid 90.27
    diethyl ether 35.62
    m-xylene 15.12
    p-xylene 13.96
    chlorobenzene 46.48
    dimethyl carbonate 64.41
    n-octane 1.42
    formamide 152.27
    cyclopentanone 166.4
    2-pentanone 65.24
    anisole 49.92
    cyclopentyl methyl ether 50.35
    gamma-butyrolactone 158.74
    1-methoxy-2-propanol 105.02
    pyridine 114.14
    3-pentanone 55.69
    furfural 234.67
    n-dodecane 1.69
    diethylene glycol 96.36
    diisopropyl ether 11.33
    tert-amyl alcohol 37.92
    acetylacetone 128.32
    n-hexadecane 1.92
    acetophenone 62.93
    methyl propionate 64.72
    isopentyl acetate 37.35
    trichloroethylene 123.23
    n-nonanol 18.42
    cyclohexanol 30.49
    benzyl alcohol 47.36
    2-ethylhexanol 20.06
    isooctanol 17.21
    dipropyl ether 26.01
    1,2-dichlorobenzene 45.47
    ethyl lactate 33.54
    propylene carbonate 78.42
    n-methylformamide 167.09
    2-pentanol 21.73
    n-pentane 1.24
    1-propoxy-2-propanol 59.45
    1-methoxy-2-propyl acetate 64.16
    2-(2-methoxypropoxy) propanol 62.83
    mesitylene 10.28
    ε-caprolactone 80.04
    p-cymene 13.81
    epichlorohydrin 128.57
    1,1,1-trichloroethane 62.8
    2-aminoethanol 51.93
    morpholine-4-carbaldehyde 323.71
    sulfolane 262.33
    2,2,4-trimethylpentane 1.54
    2-methyltetrahydrofuran 77.73
    n-hexyl acetate 35.69
    isooctane 1.16
    2-(2-butoxyethoxy)ethanol 72.59
    sec-butyl acetate 25.34
    tert-butyl acetate 49.75
    decalin 1.65
    glycerin 79.36
    diglyme 144.92
    acrylic acid 72.0
    isopropyl myristate 20.7
    n-butyric acid 56.44
    acetyl acetate 61.02
    di(2-ethylhexyl) phthalate 26.28
    ethyl propionate 33.2
    nitromethane 341.98
    1,2-diethoxyethane 59.73
    benzonitrile 60.78
    trioctyl phosphate 18.1
    1-bromopropane 20.78
    gamma-valerolactone 249.57
    n-decanol 15.1
    triethyl phosphate 26.74
    4-methyl-2-pentanol 14.44
    propionitrile 48.91
    vinylene carbonate 88.43
    1,1,2-trichlorotrifluoroethane 161.17
    DMS 48.41
    cumene 7.81
    2-octanol 14.58
    2-hexanone 40.83
    octyl acetate 26.75
    limonene 20.25
    1,2-dimethoxyethane 141.45
    ethyl orthosilicate 24.72
    tributyl phosphate 21.54
    diacetone alcohol 74.98
    N,N-dimethylaniline 41.01
    acrylonitrile 84.53
    aniline 49.84
    1,3-propanediol 66.03
    bromobenzene 37.84
    dibromomethane 36.37
    1,1,2,2-tetrachloroethane 94.15
    2-methyl-cyclohexyl acetate 33.48
    tetrabutyl urea 32.47
    diisobutyl methanol 15.28
    2-phenylethanol 44.2
    styrene 15.4
    dioctyl adipate 35.02
    dimethyl sulfate 148.07
    ethyl butyrate 37.29
    methyl lactate 64.86
    butyl lactate 34.74
    diethyl carbonate 27.84
    propanediol butyl ether 51.1
    triethyl orthoformate 30.21
    p-tert-butyltoluene 15.03
    methyl 4-tert-butylbenzoate 58.14
    morpholine 139.08
    tert-butylamine 24.14
    n-dodecanol 12.47
    dimethoxymethane 147.6
    ethylene carbonate 61.07
    cyrene 80.32
    2-ethoxyethyl acetate 56.7
    2-ethylhexyl acetate 29.84
    1,2,4-trichlorobenzene 67.18
    4-methylpyridine 102.22
    dibutyl ether 19.13
    2,6-dimethyl-4-heptanol 15.28
    DEF 112.55
    dimethyl isosorbide 109.45
    tetrachloroethylene 67.37
    eugenol 67.03
    triacetin 61.07
    span 80 52.19
    1,4-butanediol 32.56
    1,1-dichloroethane 52.52
    2-methyl-1-pentanol 21.51
    methyl formate 141.73
    2-methyl-1-butanol 24.27
    n-decane 2.36
    butyronitrile 43.17
    3,7-dimethyl-1-octanol 18.98
    1-chlorooctane 10.91
    1-chlorotetradecane 5.81
    n-nonane 1.94
    undecane 1.95
    tert-butylcyclohexane 1.69
    cyclooctane 0.9
    cyclopentanol 43.54
    tetrahydropyran 65.82
    tert-amyl methyl ether 31.51
    2,5,8-trioxanonane 117.69
    1-hexene 3.68
    2-isopropoxyethanol 53.91
    2,2,2-trifluoroethanol 76.33
    methyl butyrate 46.38

    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