chemicalmatt
Forum Replies Created
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No need to solubilize if its solid state. Just suspend with silica in the CCT.
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With no actual knowledge of your formula, and what may be present to bind water, if you have a water activity so low as to be almost nil, why bother with a preservative at all? How can this “mostly anhydrous bar” have a pH, come to think of it?
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Yup: without water as diluent that surfactant is a gummy mess.
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I’ll second that suggestion. Attend both days of NYSCC Supplier’s Day(s) and pay attention closely. You will learn a lot. InCosmetics (EU) will be even better.
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Phenoxyethanol is not deactivated by nonionic surfactants. Most overlooked property of phenoxyethanol is that it does not act well alone as a preservative. It is most effective “cooperating” with polyols, parabens, phenolics, PCMX, etc.
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Ignore that bit about “withstand salts”. It won’t. Eliminate every sodium salt you have there and you should be fine.
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My Turkish comrade, does not that preservative include benzyl alcohol? Benzyl alcohol causes the discoloration, not the acid. Parabens will work fine here, BTW.
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Virtually all of us CM are allergen-free, just as long as we do not process those raw materials in our facilities. If a CM is grinding, milling, blending nuts, shells, raw powders, dairy (?!) then they disqualify.
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You will get better results from using BTHC or BTMS as your cationic emulsion base than with CETAC as long as dimethicone is the oil being emulsified. Other than that, shea butter, marula oil, castor oil, sunflower oil,…..”the world is your oyster” for rinse-off conditioners. I’ve always been a polyquternium-10 guy myself. As for hemisqualane: prohibitively expensive in my book. Too little bang for too many bucks.
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That much ZnO will not be soluble in any workable amount of acid; which you may only use acetic or mineral acids (e.g. HCl, HNO3) anyhow, so give up on solvating it, just disperse it in oils or paraffinics like everyone else does. That way, your pH is irrelevant.
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@Herbnerd, that is really cool for menthol detection, and pun intended! Salicylic acid qualitative should be easy, just swab a ferric chloride dilute solution and if it turns purple you are SalAc positive, if not, negative. Place into a spectrophotometer (visible spectrum) cuvette for an absorbance number if that is critical.
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PPG-adducted silicones, and there are too many to mention here. Ask the folks at SilTech, Dowsil, etc. for direction.
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I don’t know where to start here….DEL the oils, DEL the glycerin, DEL the barisica (sic) alcohol, DEL xanthan gum. Get hold of a cationic polymer - say guar hydroxypropyltrimonium chloride - and disperse/hydrate it carefully into water first, then add your chosen surfactants. That will be only your starting point. Build from there. Good luck.
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There sure is. Carbopol 940 will yield a higher viscosity at 1%w/w than Seppimax ZEN. The latter is useful for its electrolytic stability, of which Carbopols have zilch.
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A pressure-sensitive label underneath the container is fine. FYI, I have printed alkali and waterfast labels from a certain coated substrate label media made by Avery in the past. I can’t remember what they were called, but they were a pain to work with.
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Pretty sure that nonionic is from Huntsman and is not commercially available to us commoners. Try looking at the Ethox catalog for a facsimile, Laureth-9 (Ethal 926) fits the bill.
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Bravo, Petrev, for both formulating a good product and taking ngaryaeva001’s advice. I agree 1000cst dimethicone is probably the most versatile. Silicone has no irritation potential at all; it is the niacin giving you that tinge of irritation, my friend. DEL it and you’ll be better off.
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Perry is right - the pH of this should be in the range of pH8.0 with that saponified olive oil in there. You also need to increase sulfoacetate, the best hydrotrope in there, and DEL coco glucosides, which contributes very little as long as you have the sarcosinate in there. Either way, I wouldn’t let this one out of the lab without a preservative, which I don’t see.
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Affirmative, Gunther. Keratin is keratin, only hair is more porous then skin and nails.
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@singal the pros & cons are this: A consulting formulator will provide you with ownership of intellectual proeprty before you even begin the contract manufacturing process, granting you leverage when they are costing your job. Relying on the CM to formuate costs much less money, usually a nominal fee, but you will not gain immediate ownership with most CM - say 99% (which makes Emily’s offer compelling, depending what they are charging.) We always grant our clients a path to ownership, usually when they reach a prescribed sales threshold, since we prefer to make a living manufacturing not consulting.
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You could just read my recent article too…see attached. (apologizing to all for shameless self-promotion)
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Compatibility should not be a problem, especially considering both have little solubility to begin with. You are creating a suspension not a solution.
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If it is not a thermoset polymer resin - which it is not - I would think adding above the Tg would be more prudent for better dispersion in your medium.
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Thanks guys - Mark & Perry - this is helpful. I have used azulene in the past, so long ago I had forgotten about it. As for regs, I always just soldier on until someone (i.e. agency, regulatory counsel, owner, brand manager) tells me to stop. An additional irony to this colorant thread: why our US FDA will not allow us to use certain natural food-grade colorants in topically applied cosmetic formulations. Go figure.
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You be they do…if you are formulating them correctly. There are several deposition considerations and additives that are critical for dimethicones to work well upon rinse-off. Read up, my friend.