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Is Pentalene Glycol (Bio) considered an effective broad spectrum preservative?
I was recently asked by a customer about a preservative called Dermosoft Pentiol Eco. INCI Pentalene Glycol. It’s a Bio version of Pentalene Glycol (by itself) being marketed as an “all natural” preservative. It’s ECOCERT and COSMOS approved.
After reading the available information, I have my concerns. I tend to be very sceptical of “all natural” preservatives to begin with, but I noticed that their prototype formulas contain no added actives or additives. So essentially a formula with no real preservation challenges. The percentage of recommended Dermosoft is 5% in these formulas, making it also very expensive. In their documentation, they do seem to allude to the fact that a secondary active may need to be added, but the prototypes do not show this.
My question is, would this be an effective preservative in a formula with a significant amount of herbal additives, which natural formulators tend to use?Your thoughts and expert input would be most appreciated.
Thank you in advance
SL -
5 Replies
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I wouldn’t use it alone but to boost other (natural) preservatives. According to Cosphatec, it’s broad spectrum but only of moderate activity. I don’t have personal experience other than some recent playing with it. Feels nice, though
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Based on theory (not practical experience), phenolics and acids should be good partners, like for example anisic and levulinic acid.Cosphatec has a blend with glyceryl caprylate and magnolia bark extract (Cosphaderm MultiMEG) which sounds nice and doesn’t have a low pH requirement.
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should be if you have a high enough dose - try it and see1,2-diols are antimicrobial by nature, and their activity increases as the chain length gets longer -
Bill_Toge said:should be if you have a high enough dose - try it and see1,2-diols are antimicrobial by nature, and their activity increases as the chain length gets longerDoes that mean that if I include 1,2 Hexanediol at 3% in a face cream formula paired with phenoxyethanol and benzoic acid, that the hexanediol at 3% would be overkill?
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