Nalidixic Acid Sodium Salt, available in a 100g laboratory-grade powder form, is a potent antibacterial agent used primarily in microbiological research and clinical diagnostics. It inhibits bacterial DNA replication, making it highly effective against a range of Gram-negative bacteria, especially those responsible for urinary tract infections. Nalidixic acid sodium salt is commonly used in bacterial susceptibility testing, pathogen isolation, and the preparation of selective culture media. Its high concentration in the 100g format makes it ideal for large-scale preparations and frequent use in laboratories conducting extensive antimicrobial resistance research.