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3in1 sports body wash
Hi,
I want to formulate a 3in1 body wash (for hair, body and face) using menthol- camphor mixture , acrylates copolymer as a thickener. Could you please answer the following questions?:
1- Is menthol and camphor mixture a eutectic mixture?
2- The acceptable percentages of menthol snd camphor for this body wash?
3- I cannot use MIT/CMIT preservative when using menthol and camohor, can I?
4- To neutralize acrylates copolymer should use NaOH? How to add this alkaline to thicken acrylates copolymer and then reduce the pH with citric acid?
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3 Replies
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@Nikifarokhi I’ll answer best I can:
1. Negative, these are not eutectic, different chemistry and not water soluble
2, Acceptable concentrations: less than 1.0% menthol, less than 0.50% camphor. You’ll know if too much when you take a hot shower - both will sting the eyes when vaporized
3. Sure you can use MIT, especially in a rinse-off.
4 You may use NaOH solution, AMP or tromethamine to neutralize. If you use Synthalen W600 (acrylates Copolymer) from 3V Sigma USA, no need to back-acid titrate, just move on.
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Thank you so much for your response.
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There are legal limits to menthol and camphor so you can also add eucalpytus and peppermint to not only disguise the scent and to add a cooling effect without the sting.
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