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    Home > Chemicals Industry > Chemical Technology > Salicylic acid

    Salicylic acid

    • Last Update: 2022-06-04
    • Source: Internet
    • Author: User
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    Salicylic acid

    Salicylicacid

    【Molecular formula and molecular weight】C 7 H 6 O 3 ;138.
    12

    【Structural formula】

    【Source】Organic Synthesis

    【Properties】White crystalline powder

    This product is soluble in water, easily soluble in ethanol , ether and chloroform

    Melting point: 157~159℃

    【Purity Check】

    TLC

    1.
    Thin layer plate silica gel G plate

    Developing agent cyclohexane- ethyl acetate -formic acid (10:1:1)

    After checking the color development of 1% ferric chloride ethanol solution, check under sunlight

    2.
    Thin layer plate silica gel G plate

    Developing agent benzene-acetic acid-methanol (30:1:3)

    After checking the color development of 1% ferric chloride ethanol solution, check under sunlight

    High performance liquid chromatography

    Chromatographic column ZORBAX Eclipse XDB-C 18 column, 5um (4.
    6mm×150mm)

    The mobile phase methanol - water (78:22) [containing cetyl trimethyl ammonium bromide (HDTA) 0.
    0015mol / L, adjusted to pH with dilute acetic acid 5], 1.
    0ml / min

    Detection wavelength 280nm

    [Structural identification] 297, 232, 209
    .

    3250 (-OH), 2550, 1670 (-C=O), 1610, 1490 (aromatic ring), 1450, 1300, 1250, 1210, 1160, 1030, 890, 760
    .

    EI-MS m/z: 138[M] +
    .

    1 H-NMR (CDCl 3 ) δ: 6.
    70 (1H, dt, H-4), 7.
    01 (1H, dd, H-6), 7.
    54 (1H, dt, H-5), 7.
    94 (1H, ddd, H -3), 10.
    36 (1H, -COOH)

    .

    13 C-NMR(CDCl 3 ) δ: 111.
    2(C-1), 162.
    2(C-2), 117.
    9(C-3), 137.
    0(C-4), 119.
    6(C-5), 130.
    9(C-6 ), 174.
    9(-COOH)

    .

    【Storage】Dry and airtight
    .

    Related links: 2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside

     

     

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