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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