6-Methyl-2-thio-2H-1,3-benzoxazine-2,4(3H)-dione , its cas register number is 23611-64-5. It also can be called 2H-1,3-Benzoxazine-2,4(3H)-dione, 6-methyl-2-thio- . When heated to decomposition it emits toxic vapors of NOx and SOx.