6-Pentadecylsalicylic acid is a lipophilic salicylic acid derivative serving as a specialty chemical intermediate and analytical reference standard (≥97.5% purity, white to beige powder). It is primarily used in pharmaceutical research for synthesizing complex compounds and as a reference for analytical testing (IR, NMR). It exhibits anti-inflammatory and keratolytic properties, making it suitable for topical formulations in skincare products treating psoriasis, acne, dandruff, seborrheic dermatitis, and scalp disorders, where it reduces scaling, redness, irritation, and promotes exfoliation for improved skin texture.