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Menthol in gel
I am trying to make a gel that contains 10% menthol crystals that is being requested by a customer, however at that high of a percent, menthol either will not mix in to the gel or it starts to look more like an emulsion. I have used it with Carbopol 940, Ultrez 10 and Ultrez 20. I have tried using Polysorbate 20 to help solubilize some of the oil and it works decent when using 5% menthol, 5% tween 20 but I wasn’t sure what the limitations on using tween were and if I would be able to take it up to 10%. There is also 10% IPA in the formula which I normally dissolve the menthol crystals in first.
Anybody have any suggestions on how I might be able to get up to 10% menthol and still make a nice gel? Thanks!
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