Used primarily as an active ingredient in over-the-counter topical treatments for cold sores and fever blisters caused by herpes simplex virus (HSV-1). It works by blocking the virus from entering and infecting healthy skin cells. Applied at the first sign of an outbreak, it can help reduce healing time and symptom severity. Also used in cosmetic formulations as an emollient and skin-conditioning agent due to its long hydrocarbon chain, providing a protective barrier that helps retain moisture. Its waxy nature makes it suitable for creams, ointments, and lip products where a smooth, non-greasy feel is desired.