[TKurt]

Thanks @Perry for you reply. The reason I mention the buffer is only because Lonza recommends it. I got their PDF about the preservative and that is what is recommended.

I did test both of them and the final pH of the cream changed significantly, so thanks on the info about the acid groups!

I am just back to formulating, and I still have tons to learn, so I’m very grateful to be accepted here! Thanks for sharing all your knolodge Perry!

[TKurt]

Thanks @PhilGeis for your reply, I’m not going to lie, I got a bit upset that s not a very good preservative since I’ve being loving it! But is good to know that it might not be the one I will stick to

[TKurt]

Hi, I’m Tais from Australia and I started my formulation journey in 2016 but only recently got more into it, I’ve been following this forum for a while and I am very happy to be part of it now Hope I can help other as much as others here have helped me.