Category
Nimesulide
CAS Number
Nimesulide STD - 51803-78-2 ; IMP - A - 51765-56-1 ; IMP - B - 51765-51-6 ; IMP - E - 905858-63-1 ;IMP - F - 51765-72-1 ;
Molecular Formula
Nimesulide STD - C13H12N2O5S ; IMP - A - C13H11N3O7S ; IMP - B - C13H13NO3S ;IMP - E - C14H15NO5S2 ;IMP - F - C14H14N2O7S2;
Molecular Weight
Nimesulide STD - 308.31 g/mol ; IMP - A - 353.31 g/mol ; IMP - B - 263.31 g/mol ;IMP - E - 341.40 g/mol ; IMP - F - 386.40 g/mol
Synonym

Nimesulide - N-(4-Nitro-2-phenoxyphenyl) methanesulphonamide ;  N-(4-Nitro-2-phenoxyphenyl)methanesulfonamide; 4-Nitro-2-phenoxymethane- sulfonamide; 4'-Nitro-2'-phenoxymethanesulfonanilide;

Nimesulide EP Impurity - A - N-(2,4-Dinitro-6-phenoxyphenyl)methanesulphonamide ;

Nimesulide EP Impurity - B - N-(2-Phenoxyphenyl)methanesulphonamide; 2`-Phenoxymethanesulfonanilide; 

Nimesulide EP Impurity - E - N-(Methylsulfonyl)-N-(2-phenoxyphenyl)methanesulfonamide; N,N-bis(methylsulphonyl)-2-phenoxyaniline ; 

Nimesulide EP Impurity - F - N,N-Bis(methylsulphonyl)-4- nitro-2-phenoxyanilin ; N-Methylsulfonyl Nimesulide; N-(Methylsulfonyl)-N-(4-nitro-2-phenoxyphenyl)methanesulfonamide; N-(Methylsulfonyl)-4'-nitro-2'-phenoxymethanesulfonanilide;                                                                         

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Nimesulide for peak identification CRS is used as a reference standard to verify the identity of nimesulide by matching its characteristic chromatographic peak during analytical testing.