Isopropyl myristate, an ester synthesized from isopropyl alcohol and myristic acid (C17H34O2), operates as a polar emollient in skincare compositions, facilitating enhanced percutaneous absorption of active compounds by diminishing the stratum corneum’s resistance through lipid fluidization. This lightweight, low-viscosity solvent mitigates the oleaginous sensation of mineral oils and vegetable butters, yielding a silky, non-residue finish that improves spreadability and uniformity in topical delivery. Investigations demonstrate its capacity to augment formulation elegance, supporting moisture retention without occlusion, which proves advantageous for alleviating cutaneous dehydration in dry weather states while maintaining epidermal equilibrium. Its compatibility with lipophilic and hydrophilic phases enables stable emulsions, preventing phase separation under thermal stress and extending shelf stability. It is commonly derived from sustainable sources like coconut or palm kernel derivatives.

In haircare, isopropyl myristate functions as a refatting agent that adheres to the hair shaft, replenishing lipids depleted by surfactants in cleansing routines to restore hydrophobicity and minimize electrostatic friction. This leads to improved detangling and reduced mechanical breakage in fibers exposed to oxidative or thermal damage, with evaluations showing heightened gloss and flexibility in treated samples. As a solvent, it solubilizes fragrances and conditioning polymers, ensuring even deposition across the cuticle for sustained manageability in varied environmental humidities. Its non-greasy nature avoids limpness in fine strands, fostering volume preservation while countering dryness in chemically altered textures. It frequently stabilizes microemulsions in shampoos and serums, promoting scalp comfort by balancing sebum without buildup.