Cefalonium (dihydrate) (Standard) is the analytical standard of Cefalonium (dihydrate). This product is intended for research and analytical applications. Cefalonium dihydrate is a cephalosporin antibiotic. Cefalonium (dihydrate) is effective against Staphylococcus aureus. Cefalonium (dihydrate) has anti-inflammatory and antibacterial activities.