fareloz
Forum Replies Created
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Ethylated ascorbic acid is known as the most stable water-soluble derivative.
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I have checked several shampoos with clarifying title and they are all just regular sulfate shampoos
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Reduce Propylene Glycol to 5%
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This is almost a typical formula of a hand sanitizer (although most companies use carbomer as it is cheaper than Sepimax Zen). And sanitizers kill bacteria, right? So why do you need preservative for something that kills bacteria itself?
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The 500 Dalton Rule suggests that in order for a molecule to penetrate the skin barrier, its molecular weight must be less than 500 Daltons. All HA forms, even ultra small, are much bigger than 500 Daltons.
Also, the smaller HA ingredient - the less potent it is in terms of binding water. If you need a good hydration - use Glycerin.
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And what are the myths? The title is not related to actual posts at all. It feels like another ad of your business.
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Disclaimer: not a chemist here
pKa of an acid is pH value when half of the acid is still an acid and half is “neutralized” to conjugated base. For example if we take lactic acid, it’s pKa is 3.86. So if we take pure lactic acid solution and adjust it’s pH with NaOH to value 3.86 that will mean we have half of original lactic acid and half converted to Sodium Lactate.
Now when we talk about pKa of combined solution I don’t completely understand what this should mean and moreover what application it could have. Thinking logically we can extend pKa definition and say that pKa of combined acids solution is the pH value when half of combined solution is “neutralized”.
The problem here is it doesn’t mean that each specific acid is also half-neutralized under this value. In case of a mix of very strong acid and some weak acid it means strong acid will be neutralized almost completely with part of the weak acid.
Anyway, if we agree on definition above. I think pKa of combined solution depends on pKa of each acid adjusted by it’s concentration. I don’t think there is a trivial formula especially if the acids can interact affecting their individual pKa values.
Still I’m wondering how you want to use this measure…
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To me Sorbitol is much stickier and more costly to buy than just Glycerin
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I remember AXE advertisement in my country where a guy was spraying it all over the body in shower and then girls were literally sticking to him. So yes, I think it is just a marketing.
There might be some ingredients exposure limits (like it is allowed only under pits, but the whole body is too big surface and exposure) but I doubt it
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People earn money with this and you want get it for free?)
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No
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Your life is so wild ????
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No
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Simple answers:
1. No, most customers do not care about preservatives (and INCI in general)
2. To compete with big brands the small ones have to come up with marketing stories, one of them is fearmongering about preservatives (and other components like SLS or silicones)
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You still don’t provide the use except of this characteristic. Is it just for labeling?
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Please create a separate thread instead of hijacking others question. Because: it is the rule of the forum and more people will see it.
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Of course there is a very popular way - injections.
In terms of skincare - you are not allowed to “penetrate deep”. Skincare is not a drug, it should stay at upper layers of the skin
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I still don’t see the actual application of the value you are trying to get. Maybe you just want a characteristic which is just meaningless and no need to bother with. What you are trying to achieve with this number, what are you going to use it for?
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Yes, you should use a preservative.
And be aware that high polysorbate content gives unpleasant soapy feel on the skin
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The rule is simple - you list ingredients you put, not the outcome of their reaction. E.g. if you put Salicylic acid and NaOH - you list them, you don’t list their product of reaction Sodium Salicylate.
Same here. If you put CCT - you list it.
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It is stated in the comments - iron ions from bentonite, salicylic acid reacts with iron and creates this purple color.
If you get same result without bentonite that most likely you have water not deionized enough
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Hi Perry!
Are there any rules on the forum?
I see the OP all over the forum promoting his brand. Is this allowed? -
Yes
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Hmm, not sure why you answered to this comment, but I was answering to the topic starter. No one was talking about you and your business.
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Don’t ruin the moment of fame for the guy. He’s been 40 years in science and even has become a co-founder of a company just to write these titles in every message on this forum)