-
How to add a 1% water soluble preservative to an anhydrous product?
I listened again to the Q & A with Dr Phil Geis and Perry, ( @PhilGeis ) and came away with a question.
I work with a lot beginners…and they tend to gravitate towards anhydrous things ( a good thing). On occasion they want to add a preservative to this system. Dr Geis mentioned that a water soluble preservative was the preservative of choice. (There is a possibility the context is wrong…but almost sure the topic was….anhydrous.)
As I have never made an anhydrous product in my life…. I was curious as to how 1% of water soluble preservative would be incorporated. Can anyone suggest how this is done? Is a solubilizer required for a 1% add?
I do not have plans to ever make an anhydrous product… but those I try and help, certainly do.
Aloha.
-
This discussion was modified 11 months, 2 weeks ago by
Graillotion.
-
This discussion was modified 11 months, 2 weeks ago by Graillotion.
-
This discussion was modified 11 months, 2 weeks ago by
-
2 Replies
-
Think my comment was for a scrub - that, if a preservative was added, it should be available to probable water exposure.
I’ve used parabens for powders to address Aw changes from humid bathrooms.
Wish I could help with the how. I’m just a micro guy with limited formulation knowledge. I was blessed with excellent formulators.
-
@Gaillotion
You just add it in and stir until the mixture becomes uniform. Phenoxyethanol/EHG is good for these types of formulas as it is sufficiently oil soluble to work. Glyceryl caprylate (and) Glyceryl undecylenate is oil soluble so you just drop it in.
Log in to reply.