I was wondering if I could do an A/B with Tylenol #1's where can I find the Base ph's of Codeine and Acetaminophen? who cares about the caffeine. or maybe....
Search on it.
There should bee a decent amount of reference.
Post 499961 (https://www.thevespiary.org/talk/index.php?topic=5771.msg49996100#msg49996100)
(BieneMaya: "have a look at this", Chemicals & Equipment)