Forum Replies Created

Page 78 of 184
  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 5:57 pm in reply to: ethyl alcohol in a chemical peel.

    @Bluewoodg - You mean the product with this legal disclaimer where they deny any responsibility if you harm yourself? Why would they do that?  

    Legal Disclaimer
    Note: For Professional Use Only. By using this product, user agrees that Dermalure is not liable for any skin or body-part damage or misuse of instructions. We recommend only a professional apply and monitor the application of our products and we hold no responsibility for anyone that bypasses our recommendation of consulting with and using a professional to apply any chemical peel product. This site and the materials and products on this site are provided entirely “as is” and for informational purposes only without any warranties of any kind, whether express or implied…”
    Just because you can buy something on Amazon doesn’t mean it’s safe. And just because you used it before and haven’t been harmed doesn’t mean the next time you won’t harm yourself. 

    I’m not trying to “protect” my profession and I don’t formulate or sell acid peels.  I’m giving you a link to the safety information about the risky behavior in which you are engaging.  If you’re going to use an ingredient on your face or body at least educate yourself to the safety limits. 

    And no, you can’t use water instead of ethyl alcohol. Salicylic acid is not particularly soluble in water.

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 2:04 pm in reply to: ethyl alcohol in a chemical peel.

    You shouldn’t use Salicylic acid at a level higher than 2%.

    Please review the safety information.
    https://www.dropbox.com/s/o6th9l8c4gi70br/salicylic%20acid%20safety.pdf?dl=0

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 1:59 pm in reply to: Problem with pH & viscosity in Natural Olive oil Bodywash Formula

    To fix it, you are going to have to first get rid of the liquid soap base then make the product using Water, Betaine, Glucoside and Sulfoacetate. You’ll also probably need a thickener and a preservative.

    By definition, soap has a high pH. When you lower the pH, you reverse the chemical reaction that produces soap and it will separate into its non-soap constituent parts. You can’t make soap at a low pH.

    If you want a mild, low pH body wash…don’t use soap.

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 1:51 pm in reply to: Working back a product (product to formula) (copycatting)

    @Meemcha - Cost savings!  

    When I worked at my old company we first had a rule that no (claims) ingredient could be used at less than 0.1%. Then we figured out the cost savings of going to 0.01% was like $300,000 a year. So, the new rule was 0.01% minimum. I think by the time I left the minimum was 0.001%. :smiley:

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 1:46 pm in reply to: Advice on diluting or combining 2 chemical peel acids together ?

    @Bluewoodg - Yes, 0.5 g would be correct.  I made a mental math error.

    Corrected…

    A 10% solution of BHA will have the following:

    1.  0.5 gram of BHA
    2.  4.5 grams of water

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 1:44 pm in reply to: FDA database

    No, there is not a consolidated list.  The FDA does not work the same was as the EU regulatory site.

    I do not know the regulations for India but this article lays out how they are regulated.
    https://cliniexperts.com/cosmetic-regulatory-affairs/

  • OldPerry

    Professional Chemist / Formulator
    December 3, 2019 at 2:44 am in reply to: SLES water solubility problem.

    Don’t mix SLES with sodium chloride until you’ve first dissolved the SLES in water. 

  • OldPerry

    Professional Chemist / Formulator
    December 2, 2019 at 10:40 pm in reply to: Advice on diluting or combining 2 chemical peel acids together ?

    @ozgirl - I agree completely

  • OldPerry

    Professional Chemist / Formulator
    December 2, 2019 at 9:12 pm in reply to: Advice on diluting or combining 2 chemical peel acids together ?

    Think of it this way.  40% solution means the following:  A *5 gram sample will contain: 

    1.  2 grams of Lactic Acid
    2.  3 grams of water

    Similarly, a 10% solution of BHA will have the following:

    1.  1 gram of BHA
    2.  4 grams of water

    So, if you combine both solutions, you would get the following…

    1.  2 grams of lactic acid
    2.  1 gram of BHA
    3.  7 grams of water

    That would be 20% lactic acid, 5% BHA.  Now, if you poured that sample into something else you are going to change the percentages.

    *incidentally, a teaspoon equals about 5 grams.

  • OldPerry

    Professional Chemist / Formulator
    December 2, 2019 at 6:19 pm in reply to: Oil Free Claims

    Yeah, pretty much avoid any ingredient with the term “oil” in it. You would be hard-pressed to convince consumers your product is oil free when it has an ingredient with the word Oil in it. And some beauty blogger/influencer would likely call you out on it.

    People have a hard time convincing consumers their products are “alcohol free” (ethanol) when including an ingredient like Cetyl Alcohol.

  • OldPerry

    Professional Chemist / Formulator
    December 2, 2019 at 1:18 pm in reply to: FDA database

    You can look up ingredient safety information here. 

    https://www.cir-safety.org/ingredients

    All the ingredients banned by the FDA are listed here.
    https://www.fda.gov/cosmetics/cosmetics-laws-regulations/prohibited-restricted-ingredients-cosmetics

    For colorants, all ingredients are banned except the ones allowed on the following list by the FDA.
    https://www.fda.gov/cosmetics/cosmetic-ingredient-names/color-additives-permitted-use-cosmetics

  • OldPerry

    Professional Chemist / Formulator
    December 2, 2019 at 1:06 am in reply to: Petrolatum (Petroleum Jelly), long term safety of topical application?

    @MarkBroussard - This study would have been more compelling if they included a control. A reasonable conclusion from the study as performed is that neither Retinol nor Bakuchiol improved upon what the control cream did by itself. It seems strange that an obvious control wasn’t included.

  • OldPerry

    Professional Chemist / Formulator
    December 1, 2019 at 11:07 pm in reply to: Working back a product (product to formula) (copycatting)

    @Pharma - No, I don’t think HPTLC/HPLC/GC would be particularly helpful in knocking off a product. You have no idea the composition of the raw materials so you would have a difficult time getting an exact concentration of the raw material used. It’s more efficient to just make a good guess based on the ingredient list than it would be using analytical instruments to get the formula. 

  • OldPerry

    Professional Chemist / Formulator
    November 29, 2019 at 2:51 pm in reply to: Petrolatum (Petroleum Jelly), long term safety of topical application?

    I suspect Bakuchiol is more hype than real performance. The supporting evidence that it matches retinol is weak.

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 11:55 pm in reply to: Working back a product (product to formula) (copycatting)

    Sure, it’s pretty easy to knock-off or duplicate an existing formula. Unfortunately, the performance and quality of a formula is rarely related to how much you can charge for it.  That is all about marketing.

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 9:40 pm in reply to: Micellar Cleansing Water

    You’re right, I wasn’t precise enough. While it is a marketing term, if you start with the notion that micellar water is a solution that contains micelles then there has to be some minimum level of surfactant to be able to call something a micellar water.

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 7:32 pm in reply to: Problem in dissolving Guar Hydroxypropyltrimonium Chloride in SLES solution.

    Just mix the Guar directly into the water phase.  Slowly add it so it disperses fully.

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 2:13 pm in reply to: TDS Control in the Production Water for Cosmetics

    What is your specific question?

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 2:12 pm in reply to: Guide me to formulate a toner
  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 2:11 pm in reply to: Safe Hyaluronic acid molecular weight in Skincare

    What has convinced you that low molecular weight HA causes inflammation?

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 2:11 pm in reply to: Propanediol vs methyl Propanediol as solvent

    What are you trying to solubilize?

  • OldPerry

    Professional Chemist / Formulator
    November 27, 2019 at 1:26 pm in reply to: Micellar Cleansing Water

    Water is nothing but water.
    Micellar water has surfactants in it that helps to remove oil.
    Use a higher level of surfactant to make the makeup remover more effective.
    Micellar water is a marketing term, not a scientific term. You can call whatever you want micellar water. The only question is whether your consumers believe it.

  • OldPerry

    Professional Chemist / Formulator
    November 25, 2019 at 9:20 pm in reply to: Different mol.weight of HA in one product?

    Well, properly formulated you can make a glycerin containing serum that isn’t sticky.

  • OldPerry

    Professional Chemist / Formulator
    November 25, 2019 at 2:41 pm in reply to: Lab Alley Lab Chemicals

    Never heard of them.

  • OldPerry

    Professional Chemist / Formulator
    November 25, 2019 at 2:41 pm in reply to: Body Wash pH

    There are better ways to fix the slippery problem than raising the pH that high. But without knowing what is in your formula, there isn’t much advice that can be given.

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