Microformulation
Forum Replies Created
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The percentage of water really has no impact upon determining if it is O/W or W/O. As @Bill_Toge quite correctly pointed out, you need to look at the emulsification system. -
I would say no, but I am always conservative. If you look at it from a risk versus benefit ratio, it is theoretically a source of contamination and bottles aren’t a huge expense in the big picture.
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If you follow the most recent Croda Guidance, in their reference, they discuss calculating an HLB. However, I will agree with Pharma in many respects. I used it a great deal more in OTC manufacturing in the past where PEG’s were common. It does give a starting point for your initial proposed emulsification system which you can then tweak at the bench.
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You would have to include the whole Formula for any substantial help, but my guess is the L-Ascorbic Acid has oxidized. It can present as changes in color and/or odor. I would suggest using a more stable derivative.
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Allantoin above 0.5% becomes OTC, not a Cosmetic. Trying to achieve greater than 0.5% requires a great deal of effort to solubilize in water itself.
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Sodium Stearate if you are looking for a clear type deodorant bar. DuPont, Tate & Lyle has numerous starting Formulations. If you are thinking of a different type of product, you would really need to give more detail, such as the Formulation.
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@Belassi Your posts have been handy. I was contacted by a Vet last week with some questions. They had a dog that had some HORRIBLE adverse reactions to an Oat Shampoo. Since there is less clarity in vet ingredient decks, the deck included “freshness preservers” as a claimed ingredient. I followed it up and it was MIT/MCT.
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Can we keep in mind that this is a Technical Resource and we should probably communicate accordingly?
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I have made this product but it most definitely is an OTC product.
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We used “heat and hold” with older emulsifiers (non-ionic emulsifiers) to essentially get a more stable emulsion. The temperatures and pressures were NOT high enough to sterilize the water. The newer emulsifiers do not require this step in my experience.
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Ayari Cosmetics https://ayaricosmetics.com/
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Those are pretty extensive questions and in the end, you are asking for changes in the Formula. To be fair, you would need to pay a Consultant for such an extensive process.
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Do not try and do an SPF product with oils. You will not obtain the SPF you believe you will and it would also be an unapproved OTC.
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It can also be an incredible laxative.
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In HS I worked landscaping and we did a lot of work in Windham. It is just up the mountain a bit from us. Interestingly enough, I have a colleague in Iowa whose home was just destroyed by a tornado. They call it a dericho. She is another Cosmetic Chemist. By the way, I really enjoy your posts on your teaching aids. We need more Science education at every level.
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Yes, I am. I am from a town about 35 miles south of Albany. Catskill New York and the NYS Thruway was 1/2 a mile behind my house. For more detailed information you may want to look closer at Phil Geis’s book (New Edition released) Cosmetic Microbiology: A Practical Approach, David Steinberg’s Book “Preservative for Cosmetics” or look for information in Food Science. In my experience, Aw has more use in that sector.
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David Steinberg was quite emphatic that direct measurement is the only valid methodology. https://www.google.com/url?safe=active&sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjWxpXj5tzrAhXuoXIEHVf2C68QFjACegQIAhAB&url=http%3A%2F%2Fwww.midwestscc.org%2Fblog2%2Fwp-content%2Fuploads%2Fpresentations%2FJan2012CurrentTrendsinCosmeticPreservation.pdf&usg=AOvVaw3zOw_Ft9JkqtWTKfcU5xiq
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Aw can’t be estimated but must be shown via testing. This has been discussed by David Steinberg at length in the past at several SCC Meetings.
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If you are serious about selling in any real Market, it is crucial that you get a company email. They are easy to set-up and not terribly expensive.
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Maybe if you are MacGyver. Honestly, it would require more advanced testing.