Want to know the pH of products? At the end of each season, I will conduct pH (Potential Hydrogen) tests on all empty products that still have liquid in them and compile a master list here. The pH of each product will also appear behind the review of each empty article the product appears in. Type the product name into the search bar to find the corresponding article for the review. It is possible I will occasionally test products that are not yet empty. Place your testing request in the comments. I will test it if it is a product I own, and it is already opened. Opening and/or purchasing a product just to test it is not something I will usually do, because the expiration countdown starts the moment the product opens.