sulfametoxydiazine sulfametoxydiazine sulfametoxydiazine (inn) or sulfamethoxydiazine (usan: sulfameter) is a long-acting sulfonamide antibacterial. it is used as a leprostatic agent and in the treatment of urinary tract infections. sulfametoxydiazineclinical dataatc codej01ed04 (who) identifiers iupac name 4-amino-n-(5-methoxy-2-pyrimidinyl)benzenesulfonamide cas number651-06-9 npubchem cid5326chemspider5135 yunii3l179f09d6keggd02517 ychebichebi:53727 ychemblchembl1200359 nniaid chemdb008164comptox dashboard (epa)dtxsid5023613 echa infocard100.010.438 chemical and physical dataformulac11h12n4o3smolar mass280.30 g·mol−13d model (jsmol)interactive image smiles o=s(=o)(nc1ncc(oc)cn1)c2ccc(n)cc2 inchi inchi=1s/c11h12n4o3s/c1-18-9-6-13-11(14-7-9)15-19(16,17)10-4-2-8(12)3-5-10/h2-7h,12h2,1h3,(h,13,14,15) ykey:gptonymqftzpkc-uhfffaoysa-n y ny (what is this?) (verify) sulfamethoxydiazine is also used to treat and prevent diseases in animals. because of its relatively long persistence, sulfamethoxydiazine residue can be detected in meat, dairy, and eggs, and is considered hazardous to human health. the united states and japan both prohibit sulfamethoxydiazine residue in food, whereas the codex alimentarius commission states that the maximum limit for sulfonamides in animal tissues is 100 μg/kg.