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Hexylene glycol is a synonym for 1,2-hexanediol. However, in cosmetics, it often refers to a diol which is not a glycol in sensu stricto: 2-Methyl-2,4-pentanediol.Hexanediol is a multifunctional mostly used as preservative at lower levels and does n…
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I don't like incubators too much regarding emulsion stability. They're okay regarding chemical stability or if you produce for very hot climatate. However, without knowing your formulations and certain features of it, it's impossible to say whether …
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Original cold cream relied on wax only which hardened the 'emulsion'... however, this approach has been abondoned by most due to its inherent instability issue.In Europe, small additions of sodium or potassium soaps or standard emulsifiers are used …
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It doesn't necessarily need saponification: Search the forum for 'cold cream'.
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The new ones used in Europe for example UltraSun. They're not yet approved in the US if I'm not mistaken.
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It's a solid powder. Why add a preservative? Maybe you found the wrong one @Abdullah
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Polyol doesn't equal polyol and some speak of polyol also in the context of glycols/diols.And then there are different emulsifiers which will react differently. I've read different theories which basically have to do with head group interactions and…
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It's already on the market for example Magnolia Extract 98 by Cosphaderm which containing mostly magnolol and honokiol. From what I've read, it seems strongest against mould. Back in the day I did bioguided fractionation during my semester break als…
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Well... there are just a very few synthetic materials where we haven't found a microbe which can and will, in one way or another, eat it :smiley: .To my knowledge, sucrose stearate isn't especially prone to be 'bug food'. Ingredients of concern usua…
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1%/MW of Zn*MW of zinc PCA
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(Quote) Ugh... that seems to be a common issue with several alternative preservatives. Thanks for sharing. Regarding 'synthetic' vs.'natural' phenoxyethanol by Tyger: CAS # for both is the same = both are phenoxyethanol. Dunno why they are …
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(Quote) To my knowledge, there is no specific constituent in honeysuckle which makes it a preservative. It does work according to certain (mostly Japanese) publications though I'm a bit hesitant with all the scams around plant extracts. Hon…
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(Quote) GMCY or undecylenates? You're likely referring to GMCY... I always wondered why such a simple small ester shouldn't be digested right away. Regarding stability at pH>7: one shouldn't use such a pH when combining with anisic and l…
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(Quote) Avocado oil on my skin feels oily and sticky, mac nut oil is just wonderful, smooth, and sinks in beautifully without that drag most others have. Hard to describe...I have dicaprylyl carbonate and it does feel pretty much like all t…
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@domicanica That's why I combin it with pentanediol (1,2-hexanediol would be even better). If users get unwanted reactions to preservatives which are used at the higher end of their active range, you might consider lowering it and adding a lower amo…
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I use it for personal projects but combined with GMCY, pentanediol (and/or other glycols), and certain plant extracts and/or isolated plant constituents (such in which I trust to be what they claim to be, not weird fermented stuff or the scum by Act…
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(Quote) Go with highly refined oils and butters and there are as good as no allergens left (because these are proteins). Sure, highly allergic people shouldn't eat them but for the rest of us... Correct, the combo macadamia and ethyl ester …
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Food grade sucrose stearate often consists of a higher % of sucrose distearate (which has an approximate HLB of 6) or broader blends of different molecules whereas cosmetic grades come for example as 'HLB 11' or 'HLB 15'. Meaning, these cosmetic gra…
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Ethyl macadamiate should have the same proportions of fatty acids as the native oil.However, ethyl macadamiate is neither macadamia nut oil nor oleic and palmitoleic acid ;) .Also couldn't find it a repackers, would love to try it! All I need is a v…
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Which form of arginine did you use? If free base... I guess the high pH did lead to degradation (of either or both) and partial deprotonation of the ammonium part of taurine. Taurine is fairly stable and remains zwitterionic under more 'normal' cond…
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BTW I'm honestly not entirely sure but I think Shea nuts are also a true nuts as well as different seeds from which other cosmetic butters are extracted...And @helenhelen once you used mac nut oil (phytosteryl macadamiate is not the same!) you'll st…
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Macadamia nuts are stone fruits aka drupes like pistachios, cashews, pecans, coconuts, almonds, apricots, mangos, raspberries, and figs. Only their names sometimes contains the word 'nut'. Nut is usually a culinary term instead of a botanical one an…
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Arginine is a strong base and an amino acid = zwitterionic (technically speaking, taurine is an amino acid too... at least an amino acid metabolite) -> You are likely preferring to add an acid to adjust pH-> No issues between the two, neither …
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HOLY SH*ç"! @Graillotion I have completely zapped that mac nut oil contains that high level of palmitoleic acid! @helenhelen That oil is awsom, not just the nuts ;) . Soory, I have to go (to my *shame on me* corner).
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Unlikely. Too costly in refined/purified form. Eat fatty coldwater fish or use sea buckthorn pulp oil ;) .
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@Graillotion Degas your product prior to filling ;) .
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(Quote) Sorry, haven't seen your comment earlier.1. I don't know what type of extract you use but I know that brewed tea is full of stuff which very easily oxidises.2. Correct. This oxidation is nearly always there (due to oxygen in the pro…
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(Quote) See in bold
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(Quote) Antimicrobial glycols don't usually act by lowering water activity. You'd need something in the range of ~40%, if memory serves me right, for most to reduce water activity below the 'growth possible' threshold. Some glycols act as antimicrob…
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(Quote) Except phosphatidylinositol and some minor constituents, 'lecithin molecules' are at physiological pH zwitterionic. However, the overall charge is negative and hence, behaviour of lecithin 'droplets' is anionic. Combining with what …
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