methyclothiazide methyclothiazide methyclothiazide is a thiazide diuretic. methyclothiazideclinical dataahfs/drugs.comconsumer drug informationmedlineplusa682569atc codec03aa08 (who) identifiers iupac name 6-chloro-3-(chloromethyl)-2-methyl-3,4-dihydro-2h-1,2,4-benzothiadiazine-7-sulfonamide 1,1-dioxide cas number135-07-9 ypubchem cid4121iuphar/bps7235drugbankdb00232 nchemspider3978 nuniil3h46uac61keggd00656 nchemblchembl1577 ncomptox dashboard (epa)dtxsid6023313 echa infocard100.004.703 chemical and physical dataformulac9h11cl2n3o4s2molar mass360.22 g·mol−1 ny (what is this?) (verify)