Hypochlorous acid, the key ingredient in both MicrocynAH® and VetericynPLUS, is very sensitive to light. Oculus has studied this challenge extensively and has chosen MicrocynAH packaging so as to minimize light-induced damage.
VetericynPLUS is packaged in translucent blue bottles, which while attractive, provide very little protection against light degradation. In a very simple study, 16 ounce bottles of both the MicrocynAH® and the VetericynPLUS products were placed in a windowsill and their hypochlorous acid content was measured over time.
The hypochlorous acid content of the VetericynPLUS product dropped by a significant 94% in just 72 days. On the other hand, MicrocynAH only lost 16% of its HOCl over this same time period.