The present study investigated using expanded perlite (EP), as an affordable and environmentally friendly filler for polyvinyl chloride. The oxidative chlorophosphorylation (OxyCh) reaction was used for preparing EP/PhPVC composite. To evaluate the effect of EP on the composite's mechanical, electrical, and physical characteristics, the PhPVC (without EP) have been obtained too. A comprehensive comparison methods were carried out on optical and electrical properties of PhPVC and, EP/PhPVC. Ultraviolet-visible spectrophotometric analysis (UV-vis) demonstrated the differences between measured optical bandgap energy (Eg) of both PhPVC and EP/PhPVC. It shows that owing to its enhanced adsorption capacity and better electro-optical properties, these materials are expected to find a suitable role in various practical applications.