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    Home > Chemicals Industry > Chemical Technology > Awareness and control of allergenic chemicals (3)

    Awareness and control of allergenic chemicals (3)

    • Last Update: 2022-02-02
    • Source: Internet
    • Author: User
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    4.


    Case 1

    This case is about the synthesis of 3-bromo-5-chloromethyl-1,2,4-oxadiazole through a two-step reaction of bromination and cyclization


    The person involved noticed small blisters on his hands after the third week of the synthesis project, but did not care


    Figure 19-3 Initial hospitalization


    Figure 19-4 After two months of treatment, the arms, soles and back are all scarred

    Case study: From the perspective of the contact process and the time of onset, bromine, intermediates, chloroacetonitrile and products may all be allergens


    Lesson lesson: The compound in this case has a very strong sensitization effect.


    Case 2

    A certain research team synthesized the following compounds, and almost all people in contact with them have allergic symptoms one after another, as shown in Figure 19-5


    Figure 19-5 Symptoms of hand allergy

    Symptoms vary, some have erythema, some have blisters


     

     

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