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    Home > Chemicals Industry > Chemical Technology > 4-hydroxyphenylacetic acid

    4-hydroxyphenylacetic acid

    • Last Update: 2022-04-07
    • Source: Internet
    • Author: User
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    4-hydroxyphenylacetic acid

    4-Hydroxyphenylacetic acid

    【Structural formula】


    [Molecular formula and molecular weight] C 8 H 8 O 3 ; 152.


    [Source] Synthesis


    【Properties】White amorphous powder


    This product is easily soluble in methanol and ethanol


    Melting point: 151~153℃


    【Purity Check】

    TLC

    1.


    Eluent methylene chloride - methanol - acetic acid (5:0.


    Inspect ultraviolet light (254nm) and 10% sulfuric acid ethanol solution, heated at 105°C until the color is clear, inspect under sunlight

    2.


    Eluent petroleum ether - ethyl ether - acetic acid (3:5:0.


    Check the UV lamp (254nm) and 10% sulfuric acid ethanol solution, heat at 105℃ until the color is clear, check the high performance liquid chromatography under sunlight

    Chromatographic column Agilent C 18 , 5um (4.


    Mobile phase methanol-water-glacial acetic acid aqueous solution (14:86:1), 1ml/min

    Detection wavelength 224nm

    Differential calorimetry

    Start temperature 50℃, end temperature 300℃, heating rate 5℃/min

    【Structural identification】202,225,278


    3260 (-OH), 1708 (C=O), 1369 (C=O), 1323, 1518, 1215, 902, 823, 789, 656


    FAB-MS m/z: 153[M+H] +


    1 H-NMR (MeOD) δ: 7.


    13 C-NMR (MeOD) δ: 176.


    【Storage】Dry and avoid light
    .

    Related Links: Oroxylin B

     

     

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