1,3,5-Triazine-2,4,6(1H,3H,5H)-trione, 1,3,5-trichloro-, mixt. with 1,3-dichloro-1,3,5-triazine-2,4,6(1H,3H,5H)-trione potassium salt 30622-37-8 Penta-s-triazinetrione