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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    N

    Naproxen
    Impurity B

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    Chemical Name: (2S)-2-(5-chloro-6-methoxynaphthalen-2-yl)propanoic acid
    CAS No.: 60424-17-1
    Cat. No.: BRI.NPX.B

    Impurity C

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    Chemical Name: (2S)-2-(5-Bromo-6-methoxynaphthalen-2-yl)propanoic acid
    CAS No.: 27655-95-4
    Cat. No.: BRI.NPX.C

    Impurity D

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    Chemical Name: (2S)-2-(5-Iodo-6-methoxynaphthalen-2-yl)propanoic acid
    CAS No.: 116883-61-5
    Cat. No.: BRI.NPX.D

    Impurity H

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    Chemical Name: 6-Methoxynaphthalen-2-ol
    CAS No.: 5111-66-0
    Cat. No.: BRI.NPX.H

    Impurity J

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    Chemical Name: 2-Ethyl-6-methoxynaphthalene
    CAS No.: 21388-17-0
    Cat. No.: BRI.NPX.J

    Impurity K

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    Chemical Name: (1RS)-1-(6-Methoxynaphthalen-2-yl)ethanol
    CAS No.: 77301-42-9
    Cat. No.: BRI.NPX.K

    Impurity L

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    Chemical Name: 1-(6-Methoxynaphthalen-2-yl)ethanone
    CAS No.: 3900-45-6
    Cat. No.: BRI.NPX.L

    Nefopam
    Nifedipine

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