Ko te Tote Mata o te Kaihanga Haina, ko te Sodium Thiosulphate, e whakapotohia ana ko Hypo, he tote whanariki inorganic nui me ngā whakatakotoranga arumoni matua e rua: te sodium thiosulphate pentahydrate (CAS 10102-17-7) me te sodium thiosulphate anhydrous (CAS 7772-98-7). Ko te Pentahydrate sodium thiosulphate ka puta hei tioata monoclinic mārama kore tae me te pupuhi taiao i te hau maroke, ko te sodium thiosulphate anhydrous he paura hygroscopic ma pai me ngā āhuatanga matū pumau i te pāmahana rūma. He pai te wairewatanga wai me te ngoikore o te mahi whakaiti i ngā hua e rua, koinei te āhuatanga matū matua.
Ka tino whakahaerehia e tā mātou wheketere te tukanga purenga whakaputa kia mau tonu ai ngā tohu parakore. Ka mau tonu te taumata parakore o te Pentahydrate sodium thiosulphate ki te 99% iti rawa, ā, ka eke te taumata parakore o te momo waikore ki te 98.5%. E rua ngā taumata paerewa e whakaputaina ana e mātou: te taumata whakaahua me te taumata ahumahi whānui, me te taumata konganuku taumaha me te paru e tutuki katoa ana ki ngā paerewa kaweake o te ao.