Cefodizime acid is the free acid form of cefodizime, a third-generation cephalosporin antibiotic. It serves as a key pharmaceutical intermediate in the synthesis of cefodizime sodium, the injectable form used clinically. This compound is effective against a broad spectrum of gram-positive and gram-negative bacteria, aiding in the treatment of infections such as respiratory tract, urinary tract, biliary tract, bloodstream, and skin infections. It is also employed prophylactically in high-risk surgical patients to prevent postoperative infections. As a specialty chemical, cefodizime acid is utilized in pharmaceutical manufacturing under controlled conditions, with typical purity specifications of 89.5-100%.