Malays. J. Anal. Sci. Volume 29 Number 4 (2025): 1495

Research Article

Physicochemical and biological properties of eco-friendly soap from used cooking oil infused with colloidal oatmeal and thiourea derivative

Norsyafikah Asyilla Nordin, Nurulumi Ahmad^*, and Azni Izwati Hamdan

Faculty of Pharmacy, Universiti Sultan Zainal Abidin, Besut Campus, 22200 Besut, Terengganu, Malaysia

^*Corresponding author: numiahmad@unisza.edu.my

Received: 5 March 2025; Revised: 21 June 2025; Accepted: 26 June 2025; Published: 22 August 2025

Abstract

Escalating environmental concerns and the need for sustainable solutions have led to the exploration of innovative methods to repurpose waste materials. The culinary world generates vast amounts of used cooking oil (UCO), often seen as a disposable waste product. Repurposing UCO into soap is a sustainable waste management solution. This study aims to produce eco-friendly soap using UCO infused with colloidal oatmeal, which is renowned for its soothing and moisturizing properties. The research investigated the feasibility of utilizing readily available and inexpensive ingredients to create a functional cleansing product while minimizing environmental impact. The process involved the saponification of UCO with sodium hydroxide, followed by the incorporation of colloidal oatmeal and a thiourea derivative. The resulting soap was assessed for its physicochemical, antioxidant, antifungal, and antibacterial properties. The final product is anticipated to offer effective cleansing while being gentle and suitable for individuals with sensitive skin conditions. Overall, the production of this eco-friendly soap is expected to have a positive impact on individual’s well-being and address skincare needs while fostering environmental stewardship.

Keywords: eco-friendly soap, used cooking oil, oatmeal, thiourea, waste management

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