-
Comparison of preservative efficiency at different pH.
This data shows the MIC of a preservative blend at pH 5 and 7. It shows how much less preservative you need in pH 5 compared to pH 7 for bacteria. But it doesn’t show this comparison for fungi.
Can anyone tell that approximately how much will pH 4-5 increase the preservative efficiency compared to pH 7 for fungi.
-
6 Replies
-
Do not presume you need less due to MIC. You should use a generally effective level in each application.
-
@PhilGeis i am using the upper recommend level of preservative no matter what the pH is because i don’t do PET test yet.
I just wanted to know how much does preservative efficiency improve at pH 4-5 compared to pH 7 in an appropriate
-
really need to establish PET
-
PhilGeis said:Do not presume you need less due to MIC. You should use a generally effective level in each application.What do you think of that combo as a preservative? I don’t use that product…but I do use all three of those ingredients (plus others) in my formulas….(plus all the other hurdles).
-
About the combo, it is like this
1. 0.6% phenoxyethanol+0.25% caprylyl Glycol+0.15% hydroxyacetophenone.2. 0.7% phenoxyethanol+ 0.2% hydroxyacetophenone+0.1% caprylyl Glycol.
3. 0.5% phenoxyethanol+0.5% hydroxyacetophenone
-
Think 0.5% phenoxy is enough. The others are marginal - you need something better targeting fungi.
Log in to reply.