I religiously store all of my products in the refrigerator because my house is extremely warm.
I happened to forget a tube of LacSal outside few days ago. I used it the day after and it seems to me that the cream felt stronger (more acid).
It may very well be that my skin was just a tiny bit irritated that morning.
But since I remember from the very little Chemistry I know that the ph depends on the temperature (increasing or decreasing with increasing temperature depending on the compounds within the solution) I was just wondering out of curiosity if LacSal by any chance has a slightly lower ph when stored at higher temperature.
(I ran out of ph strips so I could not measure the ph myself)

Many thanks!

There should be no significant change in the pH.

If you applied it when it was cold, this may have had an effect on the skin.

I see, thank you Dr. Pickart.