4-(Methylsulfonyl)aniline hydrochloride

It acts as a key building block in medicinal chemistry, not for direct consumer use, and requires careful handling due to its irritant and potentially harmful nature. 4-(Methylsulfonyl)aniline hydrochloride (MSAH) is used mainly as a crucial pharmaceutical intermediate for synthesizing new drugs, especially non-steroidal anti-inflammatory drugs (NSAIDs) and potential COX-2 selective inhibitors, by incorporating its sulfonyl aniline structure into molecules like naproxen or diclofenac to enhance anti-inflammatory properties and selectivity.

API Name Esaxerenone
CAS No 177662-76-9
Molecular Formula C7H10ClNO2S
Molecular Weight 207.68 g/mol
Synonyms 4-methylsulfonylaniline;hydrochloride

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