If you look up swimming pool cleaning you will get to chlorine granules, this page also allows the download of the MSDS: https://www.ukpoolstore.co.uk/acatalog/swimming-pool-chlorine.html
On that sheet you will get the “Proper shipping name” of Sodium Dichloroisocyanuric acid. Check that one out —
Brian is correct that the handling of liquid chlorine is a dodgy pastime, the valves used are also specially modified to prevent pressure build up when closed, we used to import and sell these.
The end game is that pool condensate can contain what I believe are called chloroamines, not nice, I would not use it.
Mike.
