|What is it?
|Magnesium Myristate is the salt of magnesium and myristic acid (a fatty acid that naturally occurs in palm and coconut oils).
|Fine white powder
|Typically 5–10% for loose powders. For creamy cosmetics and binding powders for pressing you’ll need to use it at higher rates.
|Magnesium Myristate is surprisingly creamy when handled—it has a wonderful, rich slip when rubbed between the fingers.
|Nothing much—perhaps a bit fatty or waxy.
|Approximate Melting Point
|Oil, warm alcohol
|Why do we use it in formulations?
|Magnesium Myristate gives our colour cosmetics both slip and adhesion—I find it provides more adhesion than the more readily available magnesium stearate. It can also used as a binding ingredient when pressing powders, but I tend to choose magnesium stearate over magnesium myristate for pressing as stearate is more readily available.
|Do you need it?
|I highly recommend it if you want to make your own makeup—especially if you want to make items like eyeliner that have higher adhesion requirements than something like blush.
|Refined or unrefined?
|Magnesium Myristate only exists as a refined product.
|Excellent ingredient for increasing slip and adhesion/wear time in colour cosmetics—especially in more challenging products like eyeliners and lipsticks.
|It is harder to acquire than magnesium stearate.
|Alternatives & Substitutions
|You could try zinc stearate or magnesium stearate, but you will need to re-test the formula for performance and wear time.
|How to Work with It
|Blend it in with the other powders in powdered cosmetics. In cream cosmetics it can be stirred into the oil phase. As with all fine powders, be sure to wear a dust mask if it going to be whipped up/aerosolized.
|Storage & Shelf Life
|Stored somewhere cool, dark, and dry, magnesium myristate should last at least two years.
|Tips, Tricks, and Quirks
|Try incorporating a small amount of magnesium myristate into a recipe for colour cosmetics that could use better wear time—it works incredibly well!
|Recommended starter amount
|Where to Buy it
|Buy it from an online DIY ingredient supplier or Amazon.
Some Formulations that Use Magnesium Myristate
Magnesium Myristate is a very commonly used ingredient in my book, Make it Up.