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Blending Preservatives and boosters
Hello, I have started formulating skincare products on a
small scale. At this point, I only have
the ability to purchase from redistributors like Formulators Sample Shop, Lotion
Crafter, Making Cosmetics etc. I have
been trying a lot of different preservatives but would like to simplify my
ingredient stock.I am looking for guidance/resources on formaldehyde-free preservatives
for products for sensitive skin…mainly o/w lotions & serums. Most products are <5.5pH but I do have some formulas with Niacinamide w/pH around 6.1I always use a chelator (typically Sodium Phytate / Dermofeel PA-3) and airless or UV protected containers. I also tend to use Propanediol instead of Glycerin, is this helping as an additional booster?
I have had good results with Euxyl PE 9010-but should I be adding additional boosters? i.e sodium
benzoate or GMCY if working with plant-based extracts?Or should I be blending the PE9010 with another “broad spectrum” preservative blend? If so, how do I figure out the correct ratio/% of each preservative when mixing/blending in a formula?I would like to move away from Phenoxyethanol
but do not like the odor of benzyl alcohol. Any recommendations for
preservatives that do not have a strong odor (i.e Geoguard ECT and Euxyl K903).
I have had good results with Linatural Ultra 3, but I am struggling to meet the MQO at this
stage.Thank you very much for your time and knowledge…I have been
trying for a while to find information to answer these questions without luck! -
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