Abstract
The triazoloquinazole fused-ring system of the title compound, C10H7ClN4O2S, is essentially planar (r.m.s. deviation = 0.009 angstrom). In the methylsulfonyl substituent, the two S-O bonds are of equal length [1.402 (2) angstrom]. In the crystal, adjacent molecules interact weakly through Cl center dot center dot center dot N contacts [ca 3.197 (2) angstrom].