OldPerry
Forum Replies Created
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@Belassi - Technically, there is no such thing as “organic” sodium hydroxide since it lacks a Carbon atom.
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Fatty alcohols are included to give the conditioner a creamy texture, some thickening, opacity, and maybe some emollience during use.
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Yes, including the entire list of ingredients would help encourage more people to answer.
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Didn’t we already talk about this?
https://chemistscorner.com/cosmeticsciencetalk/discussion/4315/interesting-study-on-sles-helping-cetyl-alcohol-bind-hairI doubt that much fatty alcohol deposits on hair. I haven’t seen a study on it but theoretically some could bind via other mechanisms beyond electronegative forces (e.g. van der waals, hydrophobicity)
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Hello - I don’t know what you Googled but here is a list of books that will help.
https://chemistscorner.com/top-10-book-cosmetic-science-book-resources/Or you can go here and get starting formulas.
https://chemistscorner.com/where-to-find-free-cosmetic-formulas/No, there is no software where you can plug in an ingredient and the computer will tell you whether the formula will be successful or not. For that you’ll need to actually make the batch and find out. You might enlist the help of a chemist too.
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I’d be curious to see what you think after reading.
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@Biochemist have you read https://www.amazon.com/Bad-Pharma-Companies-Mislead-Patients/dp/0865478007 ?
it goes through some of the significant problems with the way research is done & the influence of companies on the science that gets communicated. He gives specific examples where evidence of harmful side effects were left unpublished which likely lead to the death of thousands of patients. It’s quite troubling.
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I’m reading the book Bad Pharma. I’m losing faith in most health studies!
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I agree with @Bill_Toge
One thing I think would be helpful would be to understand that the name of an ingredient does not really tell you everything about the substance you are using.
I remember in Organic chemistry we worked with a number of compounds. They were usually from Sigma Aldrich and were 99%+ pure. In a cosmetic lab you work with materials that are made up of lots of different ingredients even though they might have a single name.
For example, Sodium Lauryl Sulfate is much more than just Dodecyl Lauryl Sulfate. See this post I did on the subject.
https://chemistscorner.com/what-is-in-a-cosmetic-ingredient/
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@Biochemist - Yes, that would be interesting. Nothing like that thus far.
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Indeed.
Sorry if I didn’t qualify it. My question assumes that the people who would be taking the beauty from within supplement are not malnourished.
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Water
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You might need as much as a 4:1 ratio of solubilizer:oil to get a stable system.
Since you’re getting separation, the amounts you are using are not appropriate for that oil phase, There is no simple rule that says “polysorbate and alcohol are enough for an emulsion.” Every system is different and you have to experiment.
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It’s probably the Peppermint Oil & Fragrance. Did you pre-mix them in the Polysorbate before adding?
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There will be a replay so you can sign up and watch it at a later time.
Yes, the test conditions for a shampoo would be the same as for a lotion. The viscosity & pH measurements may be different depending on the specific formulas.
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Welcome aboard to all the new members! Please feel free to start a new discussion about a topic you are interested in.
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As far as the asterisk goes, there isn’t a rule against it but it also isn’t an official name. Some label experts would say that’s ok to do. I don’t think it’s a good thing to do personally. The list of ingredients shouldn’t be used for marketing purposes.
For the curious, here are the naming convention rules followed by the INCI. https://www.evernote.com/shard/s1/sh/25e7e0bb-457c-43f0-968b-e05b808a124b/fa23a027293bfad9fd423ef48913b44a
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@rebeccaso - This list is not correct. Putting terms in parentheses “(fractionated coconut oil), (cera bellina wax), (natural bacteria found in your body)” is not correct. Those phrases do not belong in the ingredient list.
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If you are following FDA cosmetic labeling rules, then no you can’t do that. The only acceptable listing for fragrance is Fragrance.
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You can find more information here. https://chemistscorner.com/how-to-stability-test-a-cosmetic-formula/
We’re actually holding a free stability testing webinar next week. You can sign up here. https://chemistscorner.com/webinars/how-to-stability-test-a-cosmetic/
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There will be a difference between SLS and SLES. Expect less foam from SLES
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@anne86sarah - without but you can also include it. The MEA will work as an opacifying agent. But it looks like you’ve already got a pearlizing agent so maybe you don’t need it.
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A surprising (and somewhat disappointing) aspect of being a cosmetic chemist is that you don’t actually do much chemical reacting.
As an organic chemist, you mix things together and hope something happens.
As a cosmetic chemist, you mix things together and usually hope nothing happens.
But as has been said, if your focus is on making the best end product you can make, becoming an expert in organic synthesis is not terribly helpful.
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Personally, I think the range of Carbomers provides almost the only thickening system you need. It has both thickening and suspending properties which is helpful plus you don’t have to worry about stickiness or stringiness.
But every thickener has its place. As @Microformulation said, you have to experiment.