trichloroisocyanuric acid molecular formula: c3o3n3cl3. cas no.87-90-1 ph(1% solution): 2.7-3.3 active chlorine: 90% min. moisture: 0.5% max density: 1.5-2.0g/cm3 sodium ion content: 500pmm max key words: tcca, tcic, water treatment chemicals, swimming pool chemicals, tcca effervescent tablet, acido tricloroisocianurico, 3 inch tcca tablets, trichlor granules, jumbo tabs, 3” chlorine tab, 3”chlorinating tablets