Delight College of Pharmacy, Koregaon Bhima, Pune, Maharashtra, India-412216
This comprehensive review systematically elaborates on the potential of alum, particularly potassium alum, as a base ingredient in modern aftershave formulations, integrating current scientific research with traditional knowledge. Alum is a naturally occurring crystalline compound possessing significant astringent, hemostatic, antimicrobial, antioxidant, anti-inflammatory and antifungal properties, making it highly suitable for post-shaving skin care applications. The review covers the complex chemical nature and physicochemical properties of potassium alum, its interaction with skin proteins and lipids, mechanism of astringency, antibacterial and antifungal actions, and modulation of inflammatory pathways. It discusses detailed preparation and synthesis protocols, highlights modern methodological advances such as nano-dispersion and liposomal carriers, and evaluates efficacy through comparative studies with conventional alcohol-based aftershaves. Clinical and in vitro data demonstrate that alum-based formulations significantly reduce microbial load, diminish bleeding and redness, improve hydration, and lower user irritation rates. Safety assessments confirm low systemic absorption, negligible toxicity, minimal mutagenic or allergic risk, and favorable environmental impact compared to petrochemical alternatives. Further, the review explores the incorporation of complementary ingredients like aloe vera and vitamin E to mitigate dryness and enhance user experience. It concludes with future perspectives focusing on synergistic herbal-alum blends, improved delivery mechanisms, clinical validation, and sustainability through ethical sourcing and biodegradable packaging. Collectively, the evidence supports alum as a biocompatible, effective, and eco-friendly active ingredient for next-generation aftershave and skincare products.
Shaving is among the most common grooming practices globally, but it causes superficial damage to the epidermal layer—manifesting as razor burns, erythema, micro-cuts, and localized inflammation. Aftershave preparations are designed to sterilize the skin, close pores, reduce irritation, and aid wound healing. However, conventional alcohol-based aftershaves often exacerbate dryness and irritation. Alum (potassium aluminum sulfate dodecahydrate) is a crystalline salt historically used as a styptic and deodorant. It remains popular in traditional markets for its proven skin-tightening and antiseptic effects [1]. Recent research renews its relevance as a sustainable and natural active for cosmetic formulations, particularly for aftershave gels and creams [2]. The astringent impact of protein precipitation at the cell's outer layer causes aluminum potassium sulfate (Alum) to reduce capillary permeability. Alum's ability to block sweat pores is very helpful for its antifungal action. By preventing sweat from escaping, it lowers the moisture content of the site of action, which inhibits the growth of fungal infections. Additionally, alum's antifungal activity also inhibits the growth and development of fungal infections, so it reduces fungal infections in two ways. Wintertime skin cracks are avoided since the alum powder dissolves in water. Because oily skin is more likely to result in pimples and acne, it has the power to dry the skin, which reduces the problem. [26]
Jayesh Gavhane, Vishal Madankar*, Anil Panchal, Potassium Alum in Modern Aftershave: Multidimensional Mechanisms, Formulation Advances, and Dermatological Safety for Sustainable Skincare, Int. J. Sci. R. Tech., 2025, 2 (11), 664-670. https://doi.org/10.5281/zenodo.17682909
10.5281/zenodo.17682909
