Evaluation of the Antibacterial Effectiveness of Calcium Hypochlorite Against Escherichia Coli and Staphylococcus Aureus Under Laboratory Conditions

Abstract

Oxidizing disinfectants are increasingly important in infection-control systems as antibiotic resistance continues to rise and pathogenic bacteria persist in clinical and public environments. This study evaluates the antibacterial effectiveness of calcium hypochlorite against two clinically significant models: Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive), under controlled laboratory conditions. Building on inorganic chemistry, biochemistry, and microbiology, the paper explains how calcium hypochlorite acts through rapid oxidative damage, emphasizing the role of hypochlorite ion chemistry and the formation of hypochlorous acid as a highly reactive antimicrobial species. The analysis links disinfectant performance to bacterial cell-envelope structure, clarifying why Gram-negative and Gram-positive organisms may show different susceptibility to oxidative stress. By integrating mechanistic discussion with laboratory-focused evaluation, the study supports more rational disinfectant selection and dosage decisions for healthcare sanitation, water treatment, and laboratory sterilization, while highlighting areas where molecular-level evidence remains limited and warrants further investigation.