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PubChem®

Published by National Library of Medicine (NLM) | U.S. Department of Health & Human Services | Catalog Last Checked: September 28, 2026 at 08:25 PM
PubChem is the world’s largest collection of freely accessible information on chemical substances, including chemical names, biological activities, physical properties, safety and toxicity information, patents, and literature citations. Chemicals can be searched by name, molecular formula, structure, and other identifiers.

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