Formulation and Evaluation of Herbal Lipstick Using Hibiscus sabdariffa

Research article

Abstract

Widespread safety concerns regarding synthetic colorants, heavy metal contamination, and chemical preservatives in modern cosmetics have resulted in transition toward plant-derived alternatives. This work presents the systematic compounding, standardization, and physicochemical characterization of an organic lipstick formulation using bioactive colorants extracted from the dried calyces of Hibiscus sabdariffa. Anthocyanin pigments were stabilized within a structural lipid matrix consisting of Apis mellifera purified wax, hexadecan-1-ol, and cold-pressed Ricinus communis seed oil. To prevent lipid peroxidation and ensure organoleptic acceptability, natural tocopherols and volatile distillates of Rosa damascena were incorporated. The compounded formulation was subjected to rigorous analytical evaluation, including thermal stability, mechanical breaking point, rheological spreadability, surface micro-uniformity, hydrogen ion concentration, and skin compatibility. The resulting product displayed an aesthetically appealing, deep pinkish-red hue with a homogeneous, non-gritty texture and a melting point stabilized at 58⁰C to 62⁰C. Mechanical testing demonstrated a robust breaking point of 150 g, indicating structural integrity suitable for practical application without fracture. A physiological pH value of 6.2  0.1 ensured complete compatibility with mucosal tissue, which was further validated by the complete absence of erythema, edema, or dermal irritation during in-vivo acute dermal safety trials on New Zealand White rabbits over a 72-hour monitoring period under Institutional Animal Ethics Committee (IAEC) approval.  These results validate the therapeutic and cosmetic viability of Hibiscus sabdariffa as a sustainable, non-toxic chromophore for high-performance personal care formulations