Is a low pH cleanser recommended because it is closer to the pH actives need to work? If I am not using actives is it okay to user a higher pH cleanser (8.5-9)?
No, higher pH cleansers are stripping and can damage your skin's acid mantle over time. Lower pH cleansers more closely match skin's natural state and help keep it balanced.
Yikes! I would never use a cleanser with a ph that high. Your skin’s natural ph is around 5.5 and using a cleanser that high will damage your acid mantle (also known as the moisture barrier). That protects your skin from bacteria, pollution, dehydration, premature aging....
I used my high ph cleansers on my makeup brushes rather than tossing, but never on my face again.