PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.
A new self-paced PubChem tutorial (https://www.nlm.nih.gov/oet/ed/pubchem/tutorial/) is also available to guide users through the steps to access chemical property and structure data that hundreds of academic, government, and industrial sources contribute to PubChem. It includes step-by-step directions for how to find chemical information using chemical names, identifiers, molecular formulas, gene symbols, proteins, pathways, taxonomies, and structures.