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Find out purity of your hypochlorous acid solution

The Chart 1. on your right, shows the level of Active HClO in the water with pH level from 4.8 to 8.5 using the above Henderson-Hasselback equation with pKa = 7.53.

At pH 6.5, the solution can still maintain relatively high active HClO of 91.5%, which can still kill bacterias and viruses (including Covid-19) almost instantly.  However, once pH passes the threshold 6.5, Active HClO percentage decreases exponentially. As an example, if your measured pH of your HClO solution is 7.5, approximate only 50% is HClO and another 50% is sodium hypochlorite (NaClO) commonly known as "bleach".  


Please note HClO molecules above pH 6.5 are unstable and tends to dissociate rather quickly after production.

​Calculate Molecular Weight of Compound
Calculate Buffer Capacity

​Calculate Molarity

Henderson-Hasselback Equation


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