EMOFLUORIntensive Care Gel, for targeted Protection Against Sensitive Teeth and erosions with stabilised stannous Fluoride

I purchased this product because it wasn't listed in the Amazon description, but when I looked at the back of the product after it arrived, I saw that the pH was 4.8.A pH of 4.8 is acidic and I am very concerned about putting this on my teeth, and when I asked the company about it I got no response.If it's okay for this product to be acidic, I'd like to know why. Also, the directions say to use it once a day in the evening, but shouldn't you brush your teeth at night and then put this gel on and go to bed? The lack of specific instructions on how to use it also makes it unreliable.Since a pH below 5.7 or 6 will dissolve your teeth, you need to know why the pH is 4.8.