PRFHF:US OTC US Purifloh Ltd, page-55

Seems as though your "limited 'research'" has been VERY limited as @dolphinwrestler has illustrated.
FYI, chlorine is also currently used to disinfect operating theatres.
I'm no scientist, but I don't have to do even "limited 'research'" to understand the effects it has over time on the equipment in the room.
Far be it from me to advise you as to how you play the market, but after looking at the first page of your HC posts, I notice you have posted on 21 different companies in about 1 month.
I suggest you concentrate on fewer companies and instead of doing "limited 'research'" perhaps try doing some in-depth research.
That way you don't have to rely on others who you don't know and may have not such pure reasons for posting on stock forums on which to base your investment decisions.
I've found that that's how you find the real gems on the ASX.