[13C6]-N-acetyl sulfamethoxazole

N-acetyl sulfamethoxazole is the main metabolite of sulfamethoxazole. It has no antibacterial activity but can cause nephrotoxicity (crystalluria and haematuria) when its concentration is above 75 mg/L.

Stable isotope labeled [¹³C₆]-N-acetyl sulfamethoxazole is intended for use as an internal standard for the quantification of N-acetyl sulfamethoxazole by LC or GC-mass spectrometry.