What is the physical properties of penicillin?

Penicillin is a type of beta-lactam antibiotic that is typically a white crystalline powder. It is soluble in water and slightly soluble in alcohol, with a melting point around 100-130°C, depending on the specific form. Penicillin exhibits stability in acidic environments but can be degraded by heat and alkaline conditions. Its physical structure includes a beta-lactam ring, which is crucial for its antibacterial activity.