Impurities and Working Standards

    The following products are in stock and can be immediately dispatched when an order confirmation is received. Also, any non-listed Impurities could be provided after request.

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    E

    Entacapone
    Impurity B

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    Chemical Name: Ethyl (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate
    CAS No.: N/A
    Cat. No.: BRI.ENT.B

    Impurity C

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    Chemical Name: 3,4-Dihydroxy-5-nitrobenzaldehyde
    CAS No.: 116313-85-0
    Cat. No.: BRI.ENT.C

    Impurity F

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    Chemical Name: (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoic acid
    CAS No.: 160391-70-8
    Cat. No.: BRI.ENT.F

    Impurity G

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    Chemical Name: (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N-methylprop-2-enamide
    CAS No.: 1364322-41-7
    Cat. No.: BRI.ENT.G

    Impurity I

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    Chemical Name: Propyl (2E)-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate
    CAS No.: 1364322-42-8
    Cat. No.: BRI.ENT.I

    Eslicarbazepine Acetate
    Esomeprazole
    Ezetimibe

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