Forum Replies Created

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  • PhilGeis

    Member
    November 28, 2023 at 5:56 am in reply to: Clay mask preservation

    You should start with irradiated clay and supplement with more water soluble preservatives - glycols, organic acids if pH works. What’s your water quality?

    CoA <100cfu/ml ? How did they treat the stuff?

  • PhilGeis

    Member
    November 27, 2023 at 5:53 am in reply to: SugaNate 160NC - Antimicrobial Activity

    The sales brochure offers preserved formulae @ pH’s inconsistent with expected range of effect. Think these folks know nothing of preservation. Consider it as a surfactant, not for any preservation potential.

  • PhilGeis

    Member
    November 21, 2023 at 8:12 am in reply to: How can this be a deodorant?

    Because the label says “deodorant”, is packaged like one and kooks like one. There’s no test it must satisfy. Caveat emptor, esp. with graillotion’s observation.

  • PhilGeis

    Member
    November 17, 2023 at 7:46 am in reply to: stabilizing H2O2 containing oxidant

    Can’t offer a risk assessment based on what your boss “thinks.” But I understand your position. Just make sure your “boss”, not you, is responsible on paper for this product.

    https://www.usptechnologies.com/what-are-h2o2-stabilizers-and-will-they-affect-my-application/

  • PhilGeis

    Member
    November 17, 2023 at 6:24 am in reply to: stabilizing H2O2 containing oxidant

    Yes - stop it. If you don’t know what’s in your ingredients, you should not be exposing consumers to your product.

  • PhilGeis

    Member
    November 14, 2023 at 2:57 pm in reply to: SugaNate 160NC - Antimicrobial Activity

    OK - it’s not as good and fairly useless vs Gram positives and fungi

  • PhilGeis

    Member
    November 14, 2023 at 6:34 am in reply to: SugaNate 160NC - Antimicrobial Activity

    Doubt it’s anything special re. micro. More gee whiz - note they do not compare to other surfactants. Even marketing does not recommend preservative free.

    Why phenethyl vs,. phenoxyethyl?

  • PhilGeis

    Member
    November 12, 2023 at 8:01 pm in reply to: Activated Charcoal Hair Shampoo

    Activated charcoal in cosmetics is useless.

    You’ll need enough for consumers to see it when they use the product.

  • PhilGeis

    Member
    November 12, 2023 at 3:50 pm in reply to: Filling cosmetics bottles to the top: bad idea?

    Net contents must be right per MAV - not under or overfill.

    Don’t want product squeezed lout merely holding the bottle.

  • PhilGeis

    Member
    November 9, 2023 at 8:40 am in reply to: filtering particles in the bulk produced product

    Amen Microformulation!! Recall an instance when poor process design had the preservative precipitate - filtration of “particles” left it unpreserved with predictably contaminated.

  • PhilGeis

    Member
    November 9, 2023 at 5:46 am in reply to: How to make an ethanol foam

    Ethanol is your antiseptic active so 60% or greater. Very Very unlikely you’ll be successful with foaming.

  • Curious re definition of sensitive. SLS innovation and success last century was for the resolution of problems with true-soap based products and hard water.

  • PhilGeis

    Member
    November 7, 2023 at 6:06 am in reply to: Can I combine two preservatives?

    Always use multiple preservatives.

    1) no single preservative has true broad spectrum efficacy

    2) it’s harder for a contaminant to adapt to multiple preservatives vs a single compound

    Phenoxy is prob best 0.5%. ECT is over formulated

  • PhilGeis

    Member
    November 5, 2023 at 6:11 am in reply to: Best source of Caffeine for eye creams

    Thanks. Pretty casual “science” published in a second rate journal. I’d not put too much significance to normal product use/benefit. They tested a product with 30% EMU oil, not the ingredients or vitamins; control/placebo was not defined; 11 subjects split between test and placebo in unidentified numbers; product application via pad was uncontrolled; technical benefits reported vs visual expression,; questionable interpretation (Fig 3 - claimed benefit when errors bars clearly overlapped).

  • PhilGeis

    Member
    November 4, 2023 at 3:27 pm in reply to: Sodium benzoate in toothpaste

    With some surfactants, the effective pKa of benzoate is increased making it effective at higher pH.

  • PhilGeis

    Member
    November 29, 2023 at 6:07 am in reply to: Clay mask preservation

    Micro quality?

  • PhilGeis

    Member
    November 22, 2023 at 10:51 am in reply to: MSDS interpretation

    like matt said

  • PhilGeis

    Member
    November 21, 2023 at 8:08 am in reply to: Dishwashing liquid

    An idea levels in that commercial product? Chloromethyl might be a stability problem at that pH esp. if any free amines. Methyl is good but needs ~100 ppm.

  • PhilGeis

    Member
    November 21, 2023 at 5:57 am in reply to: new formula for natural cosmetics

    I too await the citations. Pretentious claims for natural ingredient safety are typically based on absence of any safety data. As a toxicologist pal commented - “the only totally safe ingredient is the one that no one has tested”.

  • PhilGeis

    Member
    November 21, 2023 at 5:43 am in reply to: new formula for natural cosmetics

    “Hurdle” is a poor preservative approach in consumer use. There’s nothing esp. “intelligent” about it.

  • PhilGeis

    Member
    November 9, 2023 at 8:41 am in reply to: Sodium benzoate in toothpaste

    Not aware such data exists for others.

  • PhilGeis

    Member
    November 8, 2023 at 9:39 am in reply to: Sodium benzoate in toothpaste

    correction …… with the right challenge test.

  • PhilGeis

    Member
    November 8, 2023 at 5:11 am in reply to: Sodium benzoate in toothpaste

    One can see the impact in challenge test results - with the right challenge test resukts.

  • PhilGeis

    Member
    November 4, 2023 at 5:07 am in reply to: Best source of Caffeine for eye creams

    What do you think is caffeine’s impact on those conditions?

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