PhilGeis
Forum Replies Created
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Makes sense!!
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water?
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Wash idiots set lead at ngt 1 ppm. Lipstick is typically biggest concern - FDA recommended a limit of 10 ppm - their testing (2010) found quite 40% of lipsticks > 1ppm.
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Legislation by morons.
You’re referring to Lead/Lead compounds?
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Pretty crazy preservation - esp. @ pH 7-8. Benzyl alcohol, a little cap glycol with 3 organic acid/salts, none near pH optimum, and a degradable chelator. Benzoate might be served by surfactants and benzyl alcohol/benzoate can synergize.
evchem is spot on.
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Phased out.
I know this is not your immediate question, but be aware - the preservative is not legal in the US for this kind of product.
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Sunscreen development should pursue efficacy rather than minimalist concept. Variations in usage , stability, manufacturing will have a “just enough” formula leaving some users with insufficient protection.
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If “binding” to reducing biological activity - reducing exposure and irritation - why add?
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You’ve a poorly-preserved turning pink. What are micro data?
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Doubt you’ll find a risk assessment and it’s a good bet youtubers never bothered.
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https://www.fda.gov/medical-devices/aesthetic-cosmetic-devices/microneedling-devices
fda.gov
The FDA has reviewed and legally authorized specific microneedling products as medical devices for use in specific areas of the body.
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Safety is your responsibility - and there is no “non-” re the toxicology endpoints identified above.
Do you think a preservative may be needed?
What definition of “natural” are you using? Decyl glucoside may be naturally derived but is still a product of chemical synthesis.
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Not legal due to regulatory restrictions - nothing to do with safety.
Try these https://www.barentz-na.com/us/hii/products/Arxada-Dantogards
barentz-na.com
Household, Industrial & Institutional | Arxada Dantogard Preservatives
Household, Industrial & Institutional | Arxada Dantogard Preservatives
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Would help preservation but don’t know abut impact on buildup.
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Forget the Geogard. If all you can get is phenoxy, add ethyl hexyl glycerine.
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Agree, the ascorbic acid reaction to benzene is not a concern in this context. Might have problems with some clays, but I’d not worry much.
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Cosmetic claims are generally hype so minimalist approaches(fairy dust addition) are common. If I understand, you ask why not use a small amount of the sunscreens as it could have some effect and prob can’t hurt. Maybe - but you can’t do this in the US. It shows intent to achieve a drug effect thatbwould require approval by NDA or compliance to the relevant monoograph.
The oxides are not inert - simply reflecting light energy. The absorb light energy to form free radicals that might provoked irritation.
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Can you offer a risk assessment beyond no reports of issues. MoCRA alone will require a data based risk assessment that folks should already have.
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Another poor preservative system. What are the micro data?
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Where are you with preservation?
As stated above phenoxyethanol is NOT coconut derived.
Benzyl alcohol and DHA is a poor preservative system and you’d be better off with Benzoic than Sorbic acid.
Leucidal is a WASTE.
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If using an alcohol - suggest phenoxyethyl rather than phenylethyl. Need to know pH before trying organic acid.
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Excellent article. I’ll add a chelator like EDTA you should be using to facilitate preservation should also be constraining potential production of benzene and it’s doubtful your pH is low enough to drive the reaction <3.
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Be aware - the product preservative will not have any efficacy in dilution.