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Serum problem
Hi me serum with ingredients below got some problems,
1. after 2 months, some white unknown particle form inside the serum (forgot to keep the picture)
2. after 1 year some unknown gel-like particle form inside.Ingredients:
VP-18
(5%)Niacinamide Licorice Water Eumulgin CO 40 (80%) Part B Active Complex (provide by customer, I don’t know what is this.) Aloe Vera Extract Avocado Exract Part C KEM CP Why and what is this?
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11 Replies
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No sour smell,
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@twokchu It’s just an idea, but those extracts can ovewhelm your preservative system at high doses, and some bacteria could degrade your gelling agent.
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Active Complex (by customer) 15 Aloe Vera Extract 2 Avocado Exract 2 KEM CP 0.36 -
@ketchito
Thanks, it is a flowable liquid, the unknown gel-like appeal after 1 year, is it possible that bacteria will cause the forming of this? Is anybody experiencing this kind of bacteria infection, I know some bacterial infection may cause bubbles, sour smell….
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@twokchu Another option is that the gelling agent is becoming less hydrophilic. This can happen when for instance, there are divalent ions like Ca2+ or Mg2+, which make polymer chains to coil and not let water in. Maybe the super secret “Active complex” has some of it.
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Yes, microbial contamination. Have you done a preservative efficacy test or a contamination test?
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@ketchito, @Perry Thanks, Thanks, It is my customer formulas, so I just ran a microbial contamination test right after production completed. No microbial found in the test. Afterward, No other test
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@twokchu - you should run a contamination test on the old samples and see if they are contaminated now. I would guess this is a microbial contamination issue.
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Try doing a preservative challenge test rather than just a contamination test -this will check that your preservative system is fit for purpose.
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twokchu said:Active Complex (by customer) 15 Aloe Vera Extract 2 Avocado Exract 2 KEM CP 0.36 15% - Is there a possibility there’re cyclodextrin or gelling agents in there?
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It is just a brown color liquid. I don’t have the ingredient list of the product, but I guess is a blending of some extract or some active ingredients like Dynalift from Croda. They pour it into a glass bottle with no label.
O the other hand, they bought the Serum base from japan and mixed with the thing i make using the ingredients state above, like 37 active : 63 base.
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