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Water appears in sample when incubating for stability test
Hi everyone,
I try stability test for some of my emulsions by using a incubator at 45oC. However I see some liquid on top of the creams, even though their containers are sealed very tightly.
I have checked and the liquid seems to be hydrophillic, and because it stays on top, I dont think my emulsions are broken down.
Is it because humidity in the incubator? It is often at 70-80%. If it is so, how do you deal with it?
Thank you,
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5 Replies
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If it is water…it would evaporate in short order. Guessing something else (syneresis). Any squalane or silicone oils in the formula?
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No Squalane or silicone though. I heard someone said that because of high humidity, if space in the container is too much, there is a big risk that water would appear. Thats why they always leave very little space on top. What do you think?
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dab some of this liquid on a tissue….see it it evaporates…. or leaves an oily residue. At least you can confirm what it is…and then progress.
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It is just water from the empty space in your package.
It happens to me all the time
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Thank you.
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