-
Cream turns pink with natural preservative
Hi there!
I am making a base for cosmetics and the client wants natural preservatives in it. I used Natapres (Glycerin
(and) Leuconostoc/Radish Root Ferment Filtrate (and) Lonicera Japonica (Honeysuckle)
Flower Extract (and) Lonicera Caprifolium (Honeysuckle) Extract (and) Populus
Tremuloides Bark Extract (and) Gluconolactone) which is a mix of all those. Also p-anisic acid and glyceryl caprilate/Undecylenic Glycerides. As soon as I put Natapres it turns the base pink. I tried adding when it’s completely cold, without metallic instruments, a few days after, less concentration, … always turns pink straightaway. I have no clue about with which ingredient may react. Main ingredients in the cream are polyacrylamide/C13-14 isoparaffin/laureth-7, cetyl alcohol, macadamia oil and PEG-8 stearate.Do you have any idea what can happen?
Thank you very much!
Olga
replied 8 years, 10 months ago 3 Members · 5 Replies
-
5 Replies
-
The pink tint is most likely coming from the Populous Tremuloides (Aspen Bark) Extract in the Natapres. I have observed this reaction on occasion with straight-up Aspen Bark Extract. Try raising the pH to 4.5 and see if that helps.Honestly, you should be just fine eliminating the Natapres and just using the Glyceryl Caprylate/Undecylenate + p-anisic acid. You have plenty of preservative in there with just those two. -
Thank you very much MarkBroussard!! I’ll try that
-
If you really, really want to put the belt and suspender on your Natural Preservative combination, add 1,3-Propanediol at 6%, keep your pH below 5.5 and add some Sodium Levulinate + Sodium Anisate (Dr. Straetman’s) to complement the GlyCap/Undecylinate + p-anisic acid. But, again, that is overkill.
-
Nothing wrong with overkill when it comes to preservation as long as it doesn’t negatively impact performance.
-
Olga- From where do you purchase the p-anisic acid and glyceryl caprylate/Undecylenic Glycerides? Is it available in small quantities - for say, a hobbyist?
Log in to reply.