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the use of preservatives in W/O emulsions
Hello, I’d like to ask a question regarding the use of preservatives in W/O emulsions. In a water-in-oil emulsion, is it acceptable to add a water-soluble preservative during the cool-down phase? I’m concerned about its effectiveness, since the continuous phase is oil, and whether adding it at that stage could affect the emulsion’s stability or lead to destabilization.
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4 Replies
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What preservative(s) in what context (liquid, powder?). Consider adding to water phase.
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It’s geogard 221 inci: Dehydroacetic Acid (and) Benzyl Alcohol
Actually I want to add it to the cool down phase (not in the water phase)
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describe packaging.
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Hopefully a pump or some other protective package.
Risk in making is process water and hygiene quality - somewhat mitigated by heat of process. Adding a preservative (as aq. solution) in cool down will likely not help.
W-in-O emulsions are fairly resistant to contamination in use. Primary risk would be water added in use and you can’t protect vs. that. 221 is weak but does target mold.
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