PubChem

PubChem is a large, publicly accessible database that provides information about chemical substances, including their structures, properties, and activities. Managed by the National Center for Biotechnology Information (NCBI), it is designed to support scientific research and education. Users can search for chemicals by name, structure, or other identifiers, and access details like chemical formulas, biological activities, and safety information. PubChem helps researchers understand the relationships between chemicals and biological systems, facilitating advancements in fields such as medicine, environmental science, and materials science.