1501
Forum Replies Created
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Dr Catherine Pratt said:1501 Hi you can use perfume fixatives like Glucam P 20, also use bottom notes like Sandal wood & resins.Good luck Catherine PrattDo you know the ratio between Fragrance and Gluco P20? Someone said it’s 5:1, another said 1: 0.6
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Cst4Ms4Tmps4 said:@1501
Here you go!
https://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2009.00501_2.x
You are welcome!
thanh you very much
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What percentage of Hotflux did you used? And too much oils can effect the feeling.
You can try the Chilli Extract, as Capsicum Oleoresin. Or you can use both of them. -
@Cst4Ms4Tmps4 Thank you. Can you give me the link of this study? (about Salicylic Acid at pH 7)
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EVchem said:https://www.cir-safety.org/
This will show studies and give you some idea what percentages were not irritating when testedThank you
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Pharma said:What’s the pH and did you put it (accidentally) in the fridge?Else, nothing suspicious.
The pH is about 7-7.2
I put 1 sample in room temperature and another in incubator (45 degree C).
Both have crystallization after 5-7 days -
ketchito said:Hi Alan. Both Sodium citrate and Bicarbonate are salts of strong bases, which means that in solution, they will form Sodium hydroxide.
So, what might be happening is that your Salicylic acid that is not very water soluble (that’s why the recrystallization), will react with the Sodium hydroxide, forming as a result of neutralization, Sodium salicylate, which is more water soluble.
You could replace both salts (Sodium citrate and bicarbonate) with a bit of Sodium hydroxide.
Hi @ketchito, I have a question. When the Salicylic acid react with Sodium hydroxide and be neutralized, does it still be effective?
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Dtdang said:@1501 thanks. I cannot find it by google it.Do you know where I can buy it?
The trade name is Hotflux.
https://www.ulprospector.com/en/na/PersonalCare/Detail/4826/647075/HotFlux
You can find a supplier with this name -
With 2% arpha-arbutin, the serum can be discolored by several months, I think so.
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VBE - vanillyl butyl ether. You can try this ingredient.
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Perry said:The main difference is that at concentrations safely used in cosmetics Ethylhexylglycerin is not a preservative. It will not kill microbes. It simply reduces cell membrane integrity however, microbes can recover from this. Phenoxyethanol actually kills microbes. That is why ethylhexylglycerin is promoted by reputable companies as a “preservative booster.” Some less reliable companies market it as a preservative. It is not a preservative.
Here is a good study which looks at the mechanism of action of ethylhexylglycerin and how it boosts the effects of phenoxyethanol.
Thank you, I’ll read the study carefully.
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ngarayeva001 said:If you see products that are using one of them as the only preservative these are either not properly preserved or LOI isn’t correct. A preservative must cover from gram positive bacteria, gram negative bacteria, yeast and mold. There’s no single preservative that covers from all four. Phenoxyethanol is effective from gram positive and gram negative bacteria and has no coverage for yeast and mould. EHG has some coverage for yeast and mold but I would argue that not enough. Although PE9010 is considered broadspectrum on paper it isn’t the most reliable preservative.
Oh, thankyou, I read a article and they said phenoxyethanol has fungicidal, bactericidal, insecticidal, and germicidal properties. So I think it’s good with yeast and mold. Maybe I should search for more science articles which disscuss about preservative mechanisms. Thank you so much for useful informations.
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ngarayeva001 said:Haven’t you noticed that if a product includes them, there are both? Euxyl PE9010 by Schulke.
Yeah I know, but there are several products on the market that use only 1 of 2 ingredients. And when I ask the prices of raw materials, the price of ethylhexylglycerin is much higher than phenoxyethanol.
So I wonder what differrent between them.
