Texture enhancer and emollient as used in cosmetics. There is also research showing it can help enhance the absorption of ingredients in a cosmetic formula.
Isopropyl myristate is often called out as being a particularly bad pore-clogging ingredient; however, this assessment comes from dated research that doesn’t apply to how this ingredient is used in today’s cosmetics.
References for this information:
Journal of Cosmetology and Trichology, November 2015, ePublication
Skin Pharmacology and Physiology, 2012, pages 200-207