Cefotaxime sodium salt is the sodium salt form of cefotaxime, a third-generation cephalosporin antibiotic. As an analytical reference substance (≥99% purity), it is primarily used in pharmaceutical laboratories for quality control, assay development, and validation of analytical methods such as HPLC. It serves as a standard for identifying and quantifying cefotaxime in drug formulations. Clinically, cefotaxime is widely used to treat various bacterial infections, particularly those caused by Gram-negative and Gram-positive bacteria, including respiratory tract infections, urinary tract infections, sepsis, meningitis, and intra-abdominal infections. Due to its broad-spectrum activity, it is often administered in hospitals for patients with severe or life-threatening infections. It is also used in surgical prophylaxis to prevent infections during and after operations. The drug is typically administered via injection or intravenous infusion, ensuring rapid absorption and distribution in the body. Its stability and efficacy make it a reliable choice for treating infections in both adults and children.