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Can I combine two preservatives?
Can I combine phenoxyethanol and Geogard Ect for my natural shampoo and face wash?…
What’s should be the ratio for both these preservatives?
Will that be ok if I use phenoxyethanol-0.5%+ Geogard Ect -0.5% ?? -
4 Replies
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You can - but the combination is not great. Benzyl or phenoxy with benzoate AND a chelator will do well in a shampoo. But “natural”
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but why use more than only preservative agent?
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As I see on this forum, the mix is usually used because only one agent rarely covers all kind of spoilage (bacteria, mold or yeast).
For example in this thread: https://chemistscorner.com/cosmeticsciencetalk/discussion/euxyl-pe-9010-use-in-water-based-products/
mentioned that Euxyl PE9010 alone has a gap in antifungal efficacy for relevantly susceptible products.
chemistscorner.com
Euxyl PE 9010 use in water based products - Chemists Corner
Hello everyone,This is my first post here so please bear with me :# I've been researching the presevative Euxyl PE 9010 (INCI: Phenoxyethanol, ethylhexylglycerin) and…
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Always use multiple preservatives.
1) no single preservative has true broad spectrum efficacy
2) it’s harder for a contaminant to adapt to multiple preservatives vs a single compound
Phenoxy is prob best 0.5%. ECT is over formulated
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