[Fekher]

Supposed that a lot of listed thickeners works in this pH range.

[Fekher]

This is awesome answer from the expert @PhilGeis finally a trusted answer, then according to my vocabulary phenoxyethanol and sensicarec1090 are not board spectrum.

Just disappointment from ul prospector supposed reference. The most trusted site according to your comment is makingskincare. (the screenshot from it)

Screenshot_20240324-195343.jpg 326 KB Image File - Click to view

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[Fekher]

Thanks a lot @PhilGeis

@Graillotion so I want to know if there is contradiction between references

How to know the truest?

For example according to this discussion phenoxyethanol is not board spectrum same according to humble me and makingskincare however in ulprospector it is described as board spectrum. Same thing about sensicare c1090 it is described as board spectrum however some professionals said that is not.

Really as professional that is soo confusing.

Any help

@Perry44 @Paprik @ketchito @Abdullah any one else.

[Fekher]

I have idea thatadding EDTA improves Foaming, however 0.65 seems high to ordinary. I know some formulation reach 0.2%.

[Fekher]

Thanks a lot @Abdullah

[Fekher]

Thanks @Abdullah if you can make screen shot the link did not open.

[Fekher]

Thanks for share

[Fekher]

I’am already don’t trust preservative supplier marketing because it will just try to make his products perfect. the contradiction i found in trusted references as example ulprospector says that phenoxyethanol effecient for gram+, -, yeat and mold however makingskincare and humble and me says that it is not efficient for fungi(yeast and mold) so how can I know the correct generally if I can not buy the book(the of it please) ?<div>

Then according to you phenoxyethanol and sensicare c1090 are they efficients for gram+, -, YMF or efficients only for gram+, -?

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[Fekher]

My question is approach one if I find a contradictory description of the field of activity of preservative (one says that the preservative is effective only for gram+,- and the other says that it is effective even with yeast and mold) how to know the correct description? so here we are talking about a specific thing and not a vague term.

@PhilGeis @Graillotion

[Fekher]

The let’s give you according to me as professional what i mean by board spectrum that : preservative cover gram+, gram - , yeast, mold, so it did not need to combine with other preservative.<div>

So can I have answer depending on this definition because there is no answer in last comment according to my definition.

Then it is not true that always preservative described as board spectrum as example phenoxyethanol in humble and me is described as not board spectrum and the same for other preservatives.

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[Fekher]

What is the reference of that curve please?

[Fekher]

Thanks a lot for the precious answers @PhilGeis @Abdullah so the emulsion don’t solve the solibilty problem of IPBC?( It seems paraben are the best)

[Fekher]

What do you think about 0.8% sensicare c 1090 as cosmetic preservative? @PhilGeis and @Abdullah take look for this I guess it is reference

https://www.ulprospector.com/fr/na/PersonalCare/Detail/124608/748120/SENSICARE-C-1090

ulprospector.com

SENSICARE C 1090 de Chemipol - Produits cosmétiques & de soins

SENSICARE C 1090 is a broad spectrum preservative for cosmetics specifically developed for controlling bacterial, fungal, and yeasticidal growth. Preser...

[Fekher]

Thanks a lot what about adding 0.2% sodium benzoate?

[Fekher]

Thanks a lot @PhilGeis for IPBC for leave on is it good 0.1% level?

[Fekher]

Answer late better then not answering, I hate soap effect in cream almost reference use it between 0.2% and 0.3% the xanthan gum may I will try your level 0.4%.

[Fekher]

So ipbc and parabens are allowed which type of parabens you recommend and their levels, and will be good combination 0.1% IPBC and 0.8 %phenoxyethanol. (I don’t know if I can find IPBC)

[Fekher]

@Paprik any start point for Hec and xanthan gum?<div>

And for wax what about paraffin wax, have you better suggestions?

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[Fekher]

@Paprik any add?

[Fekher]

Any share please? @ketchito

[Fekher]

I made some researchement about your input and it seems lovely one, just why formulator will go with them versus carbomers? Referring to (coast/quality)

[Fekher]

How did you calculate 16% please and with @PhilGeis do you think for pH between 5_5.5 combination 0.8%phenoxyethanol 0.2 sodium will be good for cream and no high ethoxylated cosmetic products?

[Fekher]

My ph 4.9 however have you reference for 0.5% level because from researchement I find in cosmetic it is used in 0.2% level.

[Fekher]

Thanks for this interesting add I suspect to synergy that’s why mentioned that 0.2% did not give convinced thickening effect(in water not in emulsion) . May I will try it when I have time.

[Fekher]

For the grade of xanthan gum that I have in only water(not emulsion) 0.2% did not give convinced viscosity and even in sensory aspect it is not lovely.