As a pure element, iodine is a lustrous purple-black nonmetal that is solid under standard conditions and it is the only halogenic to exist as a solid at room temperature. It sublimes (changes from a solid to a gaseous state while bypassing a liquid form) easily and gives off a purple vapor. Very strong disinfectant, but hard to apply, because it vaporizes very easy and quickly.
Ion-Exchange resin is impregnated by WatSup™ with pure, very high quality Iodine which will stop vaporizing the next 25 years. One liter of this iodine-resin will disinfect > 150.000 liters of water from rivers/lakes such as Lake Victoria and Yangtzekiang, Mississippi, Jenisej, Nile or Amazon river. The process requires NO Energy & NO Electricity. Very suitable for non-urban systems.