Sounds like $NBY voodoo science snake oil scammy sales pitch to me
Trying to claim it is special, novel, and so on
"Hypochlorous acid and hypochlorite ion are both disinfection agents. ... At a pH of about 5, nearly all the chlorine is present as HOCl, and at pH 8.5, nearly all the chlorine is present as OCl¯. In sanitizing water, hypochlorous acid (HOCl) is 80-100 times more effective as hypochlorite ion (OCl¯).
Quoting: Basic Chemistry of Chlorination - Hydro Instruments
Just use DI water lab grade water, add the Chlorine gas, use a tiny bit of CO2, to lower the pH to 5.0 or to raise it a tiny with NaHCO2 and poof you have it.