Monostearyl phosphate

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  • Identifiers

    CAS number
    2958-09-0

    Molecular formula
    C18H39O4P

    SMILES
    CCCCCCCCCCCCCCCCCCOP(=O)(O)O

    Safety labels

  • Odor profile

    Fragrance
    Waxy 63.63%
    Fatty 46.57%
    Oily 37.44%
    Odorless 34.88%
    Fresh 26.76%
    Citrus 26.43%
    Balsamic 23.66%
    Clean 23.16%
    Woody 22.02%
    Sweet 21.18%

     

    Flavor
    Fatty 57.43%
    Waxy 53.42%
    Mild 40.84%
    Odorless 32.35%
    Bland 31.42%
    Fat 31.28%
    Oily 30.38%
    Faint 29.49%
    Coconut 28.66%
    Slightly waxy 25.31%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    7.3

    pKa est.
    7.71 (neutral)

    Molecular weight
    350.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    440°C

    Flash point

    • 255.29 ˚C est.

  • Synonyms

    • Octadecyl dihydrogen phosphate
    • Monostearyl phosphate
    • 2958-09-0
    • Monooctadecyl orthophosphate
    • Stearyl acid phosphate
    • UNII-NDC1GQT17K
    • NDC1GQT17K
    • EINECS 220-983-1
    • NSC 41920
    • NSC-41920
    • DTXSID20880482
    • RefChem:159624
    • DTXCID3030636
    • STEARYL DIHYDROGEN PHOSPHATE
    • OCTADECYL PHOSPHATE ((C18H37O)(OH)2PO)
    • Octadecyl phosphate
    • Monooctadecyl phosphate
    • Monostearyl dihydrogen phosphate
    • Dihydrogen monooctadecyl phosphate
    • Monostearyl acid phosphate
    • Phosphoric acid, monooctadecyl ester
    • octadecylphosphoric acid
    • monostearylphosphoric acid
    • SCHEMBL316758
    • SCHEMBL1651020
    • phosphoric acid monostearyl ester
    • DIHYDROGEN STEARYLPHOSPHATE
    • MONO-N-OCTADECYL PHOSPHATE
    • NSC41920
    • MFCD00031523
    • SY299106
    • NS00040723
    • Q27284808
    • 2958-09-0

  • Applications

    Monostearyl phosphate (CAS 2958-09-0) is a fatty-ester phosphorus compound that functions primarily as a nonionic surfactant and emulsifier, with typical use in detergent and cleaner formulations and in cosmetic/personal-care products to improve wetting, dispersion, and stabilization. It also serves as a processing aid and co-surfactant in polymer and plastics formulations (including PVC and coatings) to improve flow, compatibility, and pigment dispersion. In coatings and inks, it can act as a dispersant/compatibilizer to enhance pigment stability and film formation. It can be used as a plasticizer or lubricant in polymer processing to impart flexibility and lubricity. Additionally, it may be employed as an intermediate for synthesizing other phosphorus-containing esters and specialty additives, subject to formulation requirements and regulatory constraints.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 23.16
    methanol 29.76
    isopropanol 22.06
    water 0.24
    ethyl acetate 15.85
    n-propanol 23.63
    acetone 22.74
    n-butanol 21.21
    acetonitrile 5.93
    DMF 82.61
    toluene 9.92
    isobutanol 17.98
    1,4-dioxane 32.9
    methyl acetate 14.27
    THF 160.3
    2-butanone 25.21
    n-pentanol 21.94
    sec-butanol 22.08
    n-hexane 4.46
    ethylene glycol 4.83
    NMP 172.91
    cyclohexane 10.03
    DMSO 145.23
    n-butyl acetate 34.53
    n-octanol 25.88
    chloroform 65.95
    n-propyl acetate 30.94
    acetic acid 21.21
    dichloromethane 56.21
    cyclohexanone 83.06
    propylene glycol 13.79
    isopropyl acetate 21.54
    DMAc 119.75
    2-ethoxyethanol 46.11
    isopentanol 21.93
    n-heptane 5.43
    ethyl formate 14.33
    1,2-dichloroethane 44.64
    n-hexanol 24.74
    2-methoxyethanol 53.19
    isobutyl acetate 24.31
    tetrachloromethane 15.8
    n-pentyl acetate 56.86
    transcutol 141.27
    n-heptanol 29.97
    ethylbenzene 9.35
    MIBK 28.35
    2-propoxyethanol 57.01
    tert-butanol 36.05
    MTBE 26.47
    2-butoxyethanol 70.92
    propionic acid 23.03
    o-xylene 12.95
    formic acid 11.14
    diethyl ether 15.72
    m-xylene 11.43
    p-xylene 13.39
    chlorobenzene 14.12
    dimethyl carbonate 10.45
    n-octane 3.63
    formamide 22.69
    cyclopentanone 118.83
    2-pentanone 27.05
    anisole 19.04
    cyclopentyl methyl ether 60.64
    gamma-butyrolactone 102.01
    1-methoxy-2-propanol 55.5
    pyridine 30.87
    3-pentanone 23.52
    furfural 68.82
    n-dodecane 2.03
    diethylene glycol 29.3
    diisopropyl ether 10.68
    tert-amyl alcohol 36.37
    acetylacetone 36.1
    n-hexadecane 2.36
    acetophenone 33.39
    methyl propionate 18.82
    isopentyl acetate 38.89
    trichloroethylene 69.81
    n-nonanol 26.55
    cyclohexanol 32.55
    benzyl alcohol 20.32
    2-ethylhexanol 21.21
    isooctanol 27.88
    dipropyl ether 26.92
    1,2-dichlorobenzene 22.28
    ethyl lactate 22.65
    propylene carbonate 50.53
    n-methylformamide 29.14
    2-pentanol 16.83
    n-pentane 3.37
    1-propoxy-2-propanol 56.71
    1-methoxy-2-propyl acetate 42.62
    2-(2-methoxypropoxy) propanol 55.36
    mesitylene 10.65
    ε-caprolactone 76.6
    p-cymene 12.86
    epichlorohydrin 82.35
    1,1,1-trichloroethane 38.15
    2-aminoethanol 18.01
    morpholine-4-carbaldehyde 88.8
    sulfolane 244.74
    2,2,4-trimethylpentane 4.13
    2-methyltetrahydrofuran 75.41
    n-hexyl acetate 53.41
    isooctane 2.71
    2-(2-butoxyethoxy)ethanol 77.28
    sec-butyl acetate 24.53
    tert-butyl acetate 42.07
    decalin 5.73
    glycerin 24.2
    diglyme 122.89
    acrylic acid 17.13
    isopropyl myristate 21.16
    n-butyric acid 36.42
    acetyl acetate 13.07
    di(2-ethylhexyl) phthalate 24.04
    ethyl propionate 22.81
    nitromethane 29.12
    1,2-diethoxyethane 42.83
    benzonitrile 16.75
    trioctyl phosphate 19.85
    1-bromopropane 23.28
    gamma-valerolactone 125.61
    n-decanol 17.78
    triethyl phosphate 24.3
    4-methyl-2-pentanol 14.93
    propionitrile 8.97
    vinylene carbonate 32.76
    1,1,2-trichlorotrifluoroethane 83.48
    DMS 26.35
    cumene 9.95
    2-octanol 23.85
    2-hexanone 33.31
    octyl acetate 27.05
    limonene 21.19
    1,2-dimethoxyethane 65.26
    ethyl orthosilicate 26.16
    tributyl phosphate 22.13
    diacetone alcohol 59.06
    N,N-dimethylaniline 24.47
    acrylonitrile 10.27
    aniline 15.95
    1,3-propanediol 24.96
    bromobenzene 14.79
    dibromomethane 41.84
    1,1,2,2-tetrachloroethane 91.25
    2-methyl-cyclohexyl acetate 44.98
    tetrabutyl urea 39.54
    diisobutyl methanol 17.77
    2-phenylethanol 25.41
    styrene 9.37
    dioctyl adipate 35.96
    dimethyl sulfate 34.67
    ethyl butyrate 29.9
    methyl lactate 21.51
    butyl lactate 53.03
    diethyl carbonate 17.72
    propanediol butyl ether 61.91
    triethyl orthoformate 32.7
    p-tert-butyltoluene 13.76
    methyl 4-tert-butylbenzoate 62.32
    morpholine 59.85
    tert-butylamine 25.55
    n-dodecanol 12.18
    dimethoxymethane 40.73
    ethylene carbonate 29.75
    cyrene 61.4
    2-ethoxyethyl acetate 54.23
    2-ethylhexyl acetate 34.02
    1,2,4-trichlorobenzene 28.98
    4-methylpyridine 27.25
    dibutyl ether 25.34
    2,6-dimethyl-4-heptanol 17.77
    DEF 42.96
    dimethyl isosorbide 109.59
    tetrachloroethylene 57.95
    eugenol 53.18
    triacetin 57.57
    span 80 56.85
    1,4-butanediol 12.06
    1,1-dichloroethane 28.3
    2-methyl-1-pentanol 21.34
    methyl formate 14.75
    2-methyl-1-butanol 21.29
    n-decane 4.21
    butyronitrile 11.78
    3,7-dimethyl-1-octanol 24.59
    1-chlorooctane 17.48
    1-chlorotetradecane 6.17
    n-nonane 3.97
    undecane 2.81
    tert-butylcyclohexane 5.2
    cyclooctane 4.11
    cyclopentanol 52.48
    tetrahydropyran 48.93
    tert-amyl methyl ether 28.52
    2,5,8-trioxanonane 84.82
    1-hexene 9.74
    2-isopropoxyethanol 36.81
    2,2,2-trifluoroethanol 14.02
    methyl butyrate 34.1

    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