ozgirl
Forum Replies Created
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It depends on if you are making it 50% w/w or w/v?
If it is w/w (weight per weight) then you need 50 g of citric acid and 50 g water (total 100g)
If it is w/v (weight per volume) then you need 50 g of citric acid and make it up to 100 mL (in a volumetric flask).
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Biguanides are cationic and are not compatible with anionic systems.
Why do you have so much fragrance (1% should be more than enough) and why are you trying to add extra fragrance components? Just choose a fragrance you like and add it as supplied or work with your fragrance supplier to come up with something that better meets your needs.
Why did you reduce your surfactants so much in the revised version?
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Wow 😮. They only tested two microorganisms at pH 7. They didn’t even test what would be considered broad spectrum activity.
I have had products become contaminated with microorganisms using caprylhydroxamic acid based preservatives even after they passed stability and PET tests. We quickly moved away from these preservatives.
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I always assume that marketing information is overly exaggerated. The skill of the formulator is often deciding if that marketing BS will work with your brand/marketing story within the limit of cosmetic claims.
For example - A natural brand will prefer a plant extract over a functional silicone even if the product doesn’t perform as well. Whereas a high end brand will add the functional (but not natural) ingredient.
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It might be hard to find but some SLS might still be petroleum derived rather than coconut derived.
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Try increasing your CAPB and decreasing your SCI. You need more liquid.
Do you melt your BTMS, cetyl alcohol and coconut oil?
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If you can’t find a European distributor you can order small quantities from Trulux Australia (They ship internationally).
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Be aware that fertilizer/farm grade urea will often be contaminated with rocks and dirt. It will not have the same purity as that used for cosmetics.
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Great test! Thanks for sharing!
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Not sure what type of labeling your bottles have but can you put a small label with the updated ingredients on over the top of the existing label?
You would need to check if overlabeling is acceptable in your country.
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This looks like a list of every possible ingredient they could find 🙄.
I don’t think there is any right with this list.
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Try reducing your Allantoin to less than 0.5%. This is an ingredient that is known for crystallization at high concentrations. You could try searching the forum for more information.
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How is this product any better than just washing with dishwashing liquid? Do you have any way to test that it can remove milk residues?
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You could try Colonial Chemical Inc or Stepan.
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Stepan have a few free starting formulations for Car Wash products on their website.
https://www.stepan.com/content/stepan-dot-com/en/products-markets/formulation-finders.html
It might give you an idea of what concentration levels you need to use.
stepan.com
Search for starter formulas and antimicrobial formulas using Stepan's Formulation Finder.
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The SCI only ‘melts’ to become a paste type consistency. It does not become a clear liquid.
For best results try melting the SCI with only your liquid surfactant. Do not add the SLSA until after the SCI is melted. I remember reading (not sure where) that amphoteric surfactants (e.g. Cocamidopropyl betaine) work best to aid the melting of the SCI so you could try adding some amphoterics.
This link might help more.
https://www.windypointsoap.com/blogs/formulas/basic-shampoo-bar-formula
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Do you have a fragrance? Some fragrance components can can turn pink under certain conditions.
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Have you spoken with your fragrance supplier about this issue. A good supplier should be able to guide you to which fragrance types are most appropriate for your high pH conditions.
Also look at current products on the market and this will also give you an indication of which types might be suitable.
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Definitely sounds like paneling of your bottles and is generally caused by essential oils, fragrances and some solvents. It is commonly seen with orange solvents (d’limonene) in cleaning products.
Your best option is to change your bottle or your fragrance.
This article has more information
https://mindustries.com/wp-content/uploads/2019/05/M_Ind_paneling_whitepaper.pdf
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Yes you can use a boss head (like in picture 3) to attach a 3 or 4 finger clamp or a beaker or reactor clamp. The one you choose will depend on the size of your beaker or flask.
Example 3 Finger Clamp
https://www.fishersci.co.uk/shop/products/three-prong-clamps-1/12378149
Example Beaker Clamp
https://www.fishersci.co.uk/shop/products/aluminum-alloy-stainless-steel-clamp/11789027
Example Reactor Clamp
https://www.fishersci.co.uk/shop/products/alloy-zinc-plated-steel-reaction-vessel-clamp/10360295
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I’m not sure about other countries but in Australia you only need to disclose the ingredient into one of 4 concentration categories. <10%, 10-30%, 30-60% or >60%. You are advised to put narrower ranges where possible but it is not mandatory.
I work predominately with cleaning product SDS but it is similar for other product types
If I have an active ingredient with great label appeal that might have 0.5% in the formulation we would list it as <10% but if it is a less desirable ingredient (from a customer point of view) such as phenoxyethanol at 0.6% we would put it as <1% or even <0.7% so that customers can see it being used at less than the regulatory limit.
Unfortunately SDS will only give a rough idea to the concentration used and you need to use your knowledge of ingredient usage rates to get closer to what they actually use.
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It was a number of years ago but I think the pH was between 6.5 and 7.0. It was the Phenostat preservative in a surfactant blend (possibly a body wash) in PET bottle with a pump.
Hopefully the Piroctone Olamine in your system will eliminate whatever the shortfall was in the CHA system when we tried it.
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Your preservative selection will depend on what is available to you and the pH level of your product. Many car wash products tend to be mildly alkaline (pH 8 -11) so require preservatives that work in this pH range.
Depending on your country there may also be other restrictions (e.g. USA needs to be EPA registered) especially if you are planning to sell the product. If it is for your personal use only then try and find a preservative that works for the specifications of your formula.
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@Wren333 Click on one off the three Topic areas at the top of the page (General, Formulating, Cosmetic Industry) and then you should see a button for New Discussion.
