Synthetic antioxidants play a vital role in various industries by preventing oxidative degradation and extending product shelf life. However, their extensive use raises concerns due to potential health risks and environmental impact. Among these, tert-butylhydroquinone (TBHQ) is widely used but can pose toxicity and allergenic risks when consumed in excess. Accurate and sensitive detection of TBHQ is crucial for ensuring safety and regulatory compliance. In this study, we developed an advanced electrochemical sensor for TBHQ detection, utilizing a nanocomposite of bimetallic phosphate nanoparticles (NiMn(PO