Naproxen impurities

Find here the secondary pharmaceutical standard of the native API Naproxen traceable to USP, PhEur and BP.

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07503 2-Bromo-6-methoxynaphthalene pharmaceutical impurity standard Naproxen Impurity N
80818 (2S)-2-(5-Bromo-6-methoxynaphthalen-2-yl)propanoic acid pharmaceutical impurity standard S)-5-Bromo-6-methoxy-α-methyl-2-naphthaleneacetic acid (2S)-2-(5-Bromo-6-methoxy-2-naphthyl)propionic acid (S)-5-Bromonaproxen Naproxen Impurity C (PhEur)
80816 (2S)-2-(5-Chloro-6-methoxynaphthalen-2-yl)propanoic acid pharmaceutical impurity standard S)-5-Chloro-6-methoxy-α-methyl-2-naphthaleneacetic acid (2S)-2-(5-Chloro-6-methoxy-2-naphthyl)propionic acid (S)-5-Chloronaproxen Naproxen Impurity B
79584 2-Ethyl-6-methoxynaphthalene pharmaceutical impurity standard Ethylnerolin Naproxen impurity J (PhEur)
80821 (2S)-2-(5-Iodo-6-methoxynaphthalen-2-yl)propanoic acid pharmaceutical impurity standard S)-5-Iodo-6-methoxy-α-methyl-2-naphthaleneacetic acid (2S)-2-(5-Iodo-6-methoxy-2-naphthyl)propionic acid (S)-5-Iodonaproxen Naproxen Impurity D (PhEur)
07499 2-Methoxynaphthalene pharmaceutical impurity standard Methyl 2-naphthyl ether Naproxen Impurity M
08137 2-(6-Methoxynaphthalen-2-yl)acetic acid pharmaceutical impurity standard 6-Methoxy-2-naphthaleneacetic acid 6-Methoxy-2-naphthylacetic acid Naproxen impurity I
80713 (1RS)-1-(6-Methoxynaphthalen-2-yl)ethanol pharmaceutical impurity standard α-(6-Methoxy-2-naphthyl)ethanol (±)-1-(6-Methoxy-2-naphthyl)ethanol 1-[6-Methoxy-2-naphthyl]hydroxyethane 2-(1-Hydroxyethyl)-6-methoxynaphthalene 6-Methoxy-α-methyl-2-naphthalenemethanol Naproxen impurity K (PhEur)
07547 6-Methoxy-2-naphthoic acid pharmaceutical impurity standard 6-Methoxy-2-naphthalenecarboxylic acid Naproxen impurity O (PhEur)
08129 6-Methoxy-2-naphthol pharmaceutical impurity standard 2-Hydroxy-6-methoxynaphthalene 6-Methoxynaphthalen-2-ol Naproxen impurity H (PhEur)
82170 (R)-Naproxen pharmaceutical impurity standard (2R)-2-(6-Methoxy-2-naphthyl)propionic acid (2R)-2-(6-Methoxynaphthalen-2-yl)propanoic acid (R)-(−)-6-Methoxy-α-methyl-2-naphthaleneacetic acid (R)-Naproxen Naproxen Impurity G
07506 (S)-Naproxen ethyl ester pharmaceutical impurity standard (2S)-2-(6-Methoxy-2-naphthyl)propionic acid ethyl ester Ethyl (αS)-6-methoxy-α-methyl-2-naphthaleneacetate Ethyl (2S)-2-(6-methoxy-2-naphthyl)propionate Naproxen impurity F (PhEur)
Y0000631 Naproxen impurity L European Pharmacopoeia (EP) Reference Standard 1-(6-Methoxy-2-naphthalenyl)ethanone 2-Acetyl-6-methoxynaphthalene 6′-Methoxy-2′-acetonaphthone NSC 105564
80822 (S)-Naproxen methyl ester pharmaceutical impurity standard (2S)-2-(6-Methoxy-2-naphthyl)propionic acid methyl ester Methyl (αS)-6-methoxy-α-methyl-2-naphthaleneacetate Methyl (2S)-2-(6-methoxynaphthalen-2-yl)propanoate Naproxen Impurity E (PhEur)