Vol. 9, Issue 6, Part A (2025)

Disinfection is a key strategy for infection control in public health and clinical environments. This study evaluates the antimicrobial efficacy of seven commercially available floor cleaning disinfectants using the phenol coefficient (PC) test. Products are anonymized as F1 through F7. The PC method provides a quantitative means to assess bactericidal potency against standard strains of Salmonella typhi and Staphylococcus aureus, with phenol serving as the reference agent. The study reveals significant variation in disinfectant efficacy, with the highest PC recorded at 135 for F1 and the lowest at 1.65 for F6. Results suggest that quaternary ammonium compound-based disinfectants outperform traditional phenol-based and pine oil-based formulations. Findings have implications for procurement and application strategies in institutional and household disinfection protocols.