What it is
Octyldodecyl myristate is a branched-chain fatty ester that gives a smooth, cushiony slip and a relatively non-greasy afterfeel. In sunscreens it acts as an emollient and as a solvent or carrier that can help dissolve and distribute oil-soluble UV filters and pigments. Its light, fast-spreading texture makes it useful for improving the application and finish of creams and lotions.
Safety & warnings
Octyldodecyl myristate is generally well tolerated and non-sensitizing at cosmetic levels. As a fatty ester with a myristate component, it is sometimes flagged as potentially comedogenic for very acne-prone skin, though tolerance varies with the overall formula.
Origin & sourcing
Synthetic ester produced by combining octyldodecanol (a branched fatty alcohol) with myristic acid, both of which can be sourced from plant-derived fatty materials.
Questions everyone asks
What does octyldodecyl myristate do in sunscreen?
It is an emollient and solvent that gives a smooth, light feel and can help dissolve and spread oil-soluble UV filters and pigments.
Is it suitable for oily skin?
Many people tolerate it well, but those who are very acne-prone may prefer to monitor how their skin responds, since myristate esters are sometimes considered comedogenic.