Myristic acid (C14:0) is a saturated, mid-chain fatty acid widely used in cosmetic systems as a cleansing surfactant precursor, opacifier, and co-emulsifier. In water-based formulas neutralized with sodium or potassium bases, it forms the corresponding soaps (sodium/potassium myristate), which generate dense, stable foam and lift lipids and particulate soil from skin with high efficiency — properties valued in face washes and shaving formats. In emulsions, the free acid contributes to structure and viscosity while improving oil–water interfacial stability, aiding elegant, creamy textures. It is commonly sourced from plant oils (e.g., coconut/palm fractions) via hydrolysis/saponification and refined for cosmetic grade use, making it readily available and REACH/INCI listed for global deployment.

In hair care, myristic acid and its salts function as high-lather cleansing bases in shampoos, solid cleansing bars, and shaving/depilatory systems targeting sebum, waxes, and styling residue. Soap-based systems built on sodium/potassium myristate deliver abundant, fast-rising foam and strong detergency; when paired with amphoteric or nonionic co-surfactants, formulators can tune mildness and viscosity for scalp-friendly performance. Beyond the free acid, the myristate family (e.g., potassium myristate) appears as a workhorse anionic surfactant in powder face washes and foaming creams, while myristate esters (e.g., isopropyl myristate) serve distinct roles as emollients/solvents—useful context when selecting the right “myristate” for a project brief.