not sure yet [SEP] i am new to the skincare world and using preservativesi have tried luicdaland optiphen plus and both seemed to work just finethis one i smell a chemical smelli made a batch of hyaluronic acid with vit cusing the same measurements i always used but felt a sting on my facei was not sure if it was the citric acid or the germall plusalso i made a skin toner with tea and rose hydrosol that seemed finei find this one kinda chemicallish and syrupy in textureso i am a bit more careful in what i use it fori would be more apt to use it on a body product and maybe not so much face or eye area because i am not quite sure if it is the product that seems a bit strongor if it is becuase i am a noob and not sure yeti will continue to use this and update if i notice a differencei do feel safer with this one but so far i like the optithen plus besti forgot the reason why this was recommended over the other but i will keep figuring out what formulations work best for what i am doing