I’m glad you asked! The correct chemical structure for Hypochlorous Acid is HOCl, with a lower case “L” as “Cl” stands for chlorine. The break down of this chemical structure is “H” (Hydrogen), “O” (Oxygen) and “Cl” (Chlorine). However, we spell it “HOCL” on our website so that newcomers will not mistaken the lower case “L” for a capital “I”. This might be new knowledge to many people and wish to minimize confusion as much as possible.