ozgirl
Forum Replies Created
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@chemicalmatt Glycerin is often used to increase the density of the formulation which can help to keep the pearlescent from settling.
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Stepan have plenty of starting formulas for fabric softeners on their website including some using your active (https://www.stepan.com/Products/Stepan-Prototype-Formulations.aspx).The Stepanquat GA90 will already contain isopropanol (IPA) so there is no need to add any extra to your formula. You will already need lots of fragrance to cover this strong odour.I am not sure why you would add high levels of EDTA to a fabric softener.Tween 20 would probably only be used to help solubilise the fragrance.
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SCI is not suited to clear formulations due to the behaviour you have seen. Try swapping it for sodium lauroyl methyl isethionate.
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Ethylhexylglycerin is a deodorant active. It is sold by Schulke as Sensivia SC50.
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No idea how to search on the phone but this discussion might be helpful
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Try a search for salicylic acid on this forum. The options for dissolving SA have been discussed many times.
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Ethanol reduces viscosity and foam.
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I have seen ethanol used for viscosity control in concentrated dish washing formulas.
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Methylchloroisothiazolinone and Methylisothiazolinone are used by many large companies including P&G and Loreal. It is only a problem for people who are allergic and when used in leave on products and in high amounts.There are many people who have a sensitivity to potassium sorbate which is also regularly used as a preservative in “natural” products.
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I bought a Garnier product a few years ago that listed “ROPYLENE GLYCOL” in the ingredients list so it definitely could be an error.But I think as others have suggested it is probably a formulation identification number.
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@Dtdang Shelf life generally has nothing to do with thickness.My comments were related to the use of the preservatives mentioned in the original post. This combination of preservatives are only effective if the pH<6. Ineffective preservatives will mean the product has a short shelf life.There are many other factors that can also effect shelf life and this is the reason we do product stability trials.
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Wow. There are some “unique” claims out there.
I didn’t realise that I needed to attend Hogwarts School of Witchcraft and Wizardry to be a Cosmetic Chemist. I need some more magic in my lotions. -
You will get a much better shelf life if you decrease the pH of your product to <6. 2 months shelf life is not going to be readily accepted by customers.
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You could also sign up to swiftcraftmonkeys blog (https://swiftcraftymonkey.blog/blog/) for a minimum of $1/per month. She has scientific studies to back up the information she provides and lots of formulas from basics through to more advanced products.
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I have used colloidal oat powder for a similar purpose (reducing greasy feeling and thickening).
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Here is some information about different glycol ether solvents for use in glass cleaners that might be useful.
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Incroquat BTAC (Cetearyl Alcohol (and)Behentrimonium Chloride) is sulfate free but not palm free.Unfortunately when you want ingredients that meet certain criteria you will probably need to pay more.
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What else is in the formula? Do you actually want to emulsify any oils or do you just want to create a magnesium chloride gel?I have seen magnesium chloride gels that use hydroxypropyl starch as the thickening / gelling agent.Hope this helps
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The benzalkonium chloride (cationic) will be incompatible with the SLES (anionic). Leave out the SLES.The pine oil level seems high to me. Reduce it if you have trouble keeping it stable.I am assuming because of the high level of benzalkonium chloride that this is a disinfecting cleaner that is diluted before use.Check out UL Prospector and Ernest W Flicks books for some other starting formulations.Hope this helps.
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I would try adding the sodium carbomer to the oil phase.
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I have definitely exhibited all of those symptoms. -
Don’t try baking soda unless you want to see a volcano.Try neutralising with Triethanolamine (TEA) or a mix of TEA and NaOH as the neutralising agents (add NaOH to water first, then LABSA and then add TEA).It seems that your problem is the solubility of the neutralised LABSA. I think the TEA salt is more soluble than the sodium salt (not sure how it compares to the KOH).At 10% LABSA you are probably over the solubility limit of the sodium salt. Hence why when you dilute your solutions become clear.Also are you stirring during neutralisation?
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I finally had time to read the article and it definitely sounds like someone has an issue with Sunday Riley and I would too if she did lie about qualifications or who actually formulated the product but that’s because I have an issue with lies.I agree with some of the others that while having a science degree certainly helps it is not essential to being a cosmetic chemist and formulator.
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I think the high prices are due to the high methylisothiazolinone content (50%). By comparison a preservative like Kathon CG is only 1.5% total actives (a mix of MCI and MI) which is a very cheap preservative.
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The Vicks Vaporub uses a combination of Camphor, Eucalyptus and menthol as the active ingredients but this is not suitable for children under 2 and not really recommended for children under six years.The Vicks BabyRub (aka Vicks Baby Balsam) uses a combination of rosemary, eucalytpus and lavender as a fragrance in a petrolatum base. It is a non-medicated formula and doesn’t actually make any claims except for moisturising and soothing. It is essentially a massage aid and not designed to help with nasal congestion.If you just want to make the non-medicated product then just refer to the IFRA standards for baby creams and lotions each of the essential oils you want to use.