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HELP!!! my hand wash formulation still foaming after rinse
Hi & good day, I need some help especially from all the experts in this forum. Why my hand wash formulation still foaming after rinse?? I had tried numbers of different formulations but the foam still there when I rub my hands after rinse. This is my formulation:
Water q.s. to 100%
NaOH (1M) 0.004%
EDTA 0.5%
SLES (20%) 35%
CAPB (30%) 8%
DEA 4%
Propylene glycol 3.7%
Glycerin 1.3%
Citric acid -until pH6
Phenoxyethanol 0.3%What else I can change or add to make sure no more foam after rinse?
Thank you in advance
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19 Replies
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@Wanhebat a lot of correction can be done, reducing the level of DEA is the most effective solution for your formulation then no need to use both glycerin and monopolylene glycol , use just one with low level.
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Thank you for your reply @Fekher.. I will try to reduce DEA and remove glycerin and update the outcome
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@Wanhebat have good work and waiting your update
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Hi @Fekher, based on your suggestion, I came up with a numbers of new formulations. Here are the new formulations:
Formulation 1 Formulation 2 Formulation 2
Water q.s. to 100% q.s. to 100% q.s. to 100%
NaOH (1M) 0.004% 0.004% 0.004%
EDTA 0.5% 0.5% 0.5%
SLES (20%) 40% 40% 40%
CAPB (30%) 6.6% 6.6% 6.6%
DEA 0.3% - -
Propylene glycol 3.6% 3.6% 3.6%
Glycerin - - 1%
Citric acid until pH6 until pH6 until pH6
Phenoxyethanol 1% 1% 1%All 3 formulations create a acceptable amount of foam. But the main problem is the foam is still there after rinse. Is it cause by high amount of SLES???
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@Wanhebat I guess that the amount of CAPB and SLES is acceptable and not too much however make a try reducing SLES or CAPB or both.
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I would worry more about your preservative system. 1% of Phenoxyethanol alone is not enough. It is not a broad spectrum preservative (it is good for gram-negative bacteria only)
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@Fekher, this is the formulations I try today.
Formulation 1 Formulation 2 Formulation 2
Water q.s. to 100% q.s. to 100% q.s. to 100%
NaOH (1M) 0.004% 0.004% 0.004%
EDTA 0.5% 0.5% 0.5%
SLES (20%) 25.67% 25.67% 17.12%
CAPB (30%) 4.25% 4.25% 2.83%
Propylene glycol 3.6% 3.6% 3.6%
Glycerin - - -
Citric acid until pH6 until pH6 until pH6Unfortunately even at low concentration of surfactant, it still foaming after rinse.
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@Wanhebat actually this formulations have low surfactants concentration so the result is too strange then continue reducing their level untill the the you solve the problem .
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@Fekher yup.. Its too low & im worry it may affect the efficiency of this product.. Btw, is it normal after rinse, still got bubble when rub?
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@Wanhebat with last formulation I found not normal.
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@Fekher, I need your opinion. I want to know is it normal if I only add water, SLES and CAPB based on the recent formulation, but its still form bubble when I rub even after I rinsed my hands for 20 seconds? does it mean something wrong with the SLES and CAPB I purchased???? I asked the supplier but she said I have to rinse until no bubbles appear after rinse. When I asked her, I rinsed my hands for 20 secs then she said she have no idea.
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Are you sure you definitely have 20% SLES? What does it look like? Is it a paste or a liquid? -
@ozgirl yup.. its liquid.. because I purchased 70% SLES (paste) and I diluted with water to produce 20% SLES solution.
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i think different suppliers have different ingredient quality!
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I think so.. I purchased SLES from other supplier and it is much easier to rinse
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What about other commercial hand washs? Do they foam too or not?
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@Abdullah, some commercial hand wash also create bubble after rinsed and some are not.
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can i ask you why NaOH?
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