Cosmetic_Chemist
Forum Replies Created
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We usually do not share the suppliers but we do include trade names with the INCI so that they know which ingredients were a blend.
I think it can be as much detail as you want or as little detail you want to provide. As long as they have enough information to recreate the product.
You can send them just the formula, INCI, spec sheets and manufacturing procedure and call it a day.
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When a lab carries out your test, they count the number of colony-forming units on the petri dish. They give you the results of the number of colony-forming units, for the number of grams or millilitres of test material that they put on the petri dish.
so 10^6 cfu/g means 10^6 colony forming units per gram of your sample. You would be able to see the colonies but might not be able to manually count each individual one because there are so many.
As for safety, it depends on what the product is but for cosmetics generally <500 cfu/ml or the equivalent in cfu/g is considered acceptable.
It is difficult to assess the maximum microbe growth in a formulation without a preservative because there are so many variables like the formulation itself (does it contain water or probiotics etc), the environments its in and any contamination that could have occurred.
My advice would be to NEVER skip the preservative!! There are thousands of preservatives out there that you can pick and choose from to suit your formulation and any claims you make.
Preservatives ensure consumer safety and increase the products shelf-life by helping inhibit the growth of microorganisms inadvertently introduced into the product during the manufacturing process or during consumer use. Without preservation, cosmetics containing water, would only last two weeks and microorganism contamination of yeast, mold, bacteria and fungus could cause skin irritation, allergic reactions, infections and more. -
Pharma said:Do you know Estée Lauder’s Advanced Night Repair Serum?It’s one of the first well known products containing ferments which are now hyped as ‘postbiotics’… I guess that back in the day when they launched it, this term hasn’t even been invented yet
.Yes, I have seen that around the market.
It is quite expensive, i think its $130.
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PhilGeis said:Probiotic survival at titer is a major issue for any application. In a (preserved) cosmetic, it’s problematic.
Advantage? Assuming yoy’ll not pusruse some measyrable endpoint - sales hype.Thank You!
I am leaning more towards postbiotics for ease of formulating. -
ozgirl said:There is nothing that stands out as causing the stringy behaviour.Are you using Iselux Mild?If you gave the percentage of each of the raw materials this might help identify the cause.You could try removing the glycerin and essential oils to see if these are the cause of the issue.
Yes i am using iselux mild at around 20%.
I am also adding salicylic acid 1% in propylene glycol. could that be the cause?
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Syl said:
How are you tickening your body wash? Why are you using similar surfactants like Lauryl Glucoside and Coco-glucoside? What is your total surfactant concentration?Cocamidopropyl betaine is the thickener. The surfactants are a blend and are in at 20% in total.
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ozgirl said:Colonial have a few starting formulations that might be of interest
Thank you!!
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Paprik said:Your essential oils can “destroy” your viscosity. What’s the % input of them?
Also, do not forget to add an antioxidant for your essential oils.
Does the formula thicken by itself when you have Taurate and Cocamidopropyl betaine and Isethionate present? Or after adjusting pH to 5 - 6?
Do you add any salt to it?
What’s the active matter of each ingredients in your formula?
Lauryl Glucoside also causes loss of viscosity sometimes. Try it without.
You can try to dissolve SA in Propanediol. (Propylene Glycol does thin out products)
Phenoxyethanol by itself is not sufficient preservative (not “broad spectrum”)
The essential oil is only at 0.2%.
The formula thickened before adjusting the pH. There is no salt in this.I cant remove lauryl glucoside because it is part of a blend of surfactants.
i will try SA in propanediol, thank you!!
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Perry said:You’ll need to post all the ingredients in your formula to get any good suggestions. Because if propylene glycol is thinning it out you might need to make more significant changes to the formula.
Aqua
Sodium Lauroyl Methyl Isethionate
Cocamidopropyl Betaine
Sodium Methyl Oleoyl Taurate
Lauryl Glucoside
Coco-Glucoside
Phenoxyethanol
Glycerin
Citric Acid
Essential oils - For fragrance -
The customer I am developing this for wants to make such claims. I too usually avoid these situations.
I have salicylic acid in house in powder form. Any suggestions on the solvent i can use to dissolve it without altering the viscosity of the body wash?
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Microformulation said:
Thank you so much!
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Perry said:Quick answer - yes, polysorbate 20 should help. See this.
https://chemistscorner.com/cosmeticsciencetalk/discussion/5219/question-about-vitamin-e-solubilityHowever, it may also help for you to understand why your blend wasn’t stable. That’s because oils like Vitamin E is a non-polar molecule while Glycerin and most of the components of Aloe vera (98%+ water) are polar molecules. Polar molecules are not generally compatible with non-polar molecules. Basically, oil and water don’t mix.
A surfactant like Polysorbate 20 is compatible with both oil and water. So, pretty much whenever you have a situation where you are trying to combine oil materials with watery materials, you’ll need a surfactant to make that happen.
Hi Perry,
Thank you for your reply.I was hoping to add this extract blend to a variety of batches like liquid soaps, shampoos, conditioners etc. Would polysorbate 20 be the best surfactant to use in this case?
Do you have recommendations on any other surfactant or material I can add?
Thank you!