PhilGeis
Forum Replies Created
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What “tristate” is that?
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If phenoxy - be sure to add ethyl hexyl glycerine
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Generally, yes.
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isothiazolinone (MCIT) is a better primary preservative for this product - and you should have two, not just one.
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What is the preservative?
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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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Not aware cosmetic companies comment that they may not be in compliance with FDA regulations. Can you name the ones you saw?
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“Kathon CG” and similar isothiazolinones include both CMIT/MIT (`3:1), the latter (MIT) is an impurity from synthesis and present at an ineffective level. Only used in rinse off products, this is clearly the go to primary preservative in shampoos and conditioners.
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Meant as a rule of thumb. I’d reco additional, more water soluble preservative.
btw - i meant in ref to isothiazolinone, CMIt (chloromethyl-) not MIT. If it makes a difference to your policy position.
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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.