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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.
PubChem Structure Search. Search By: Name/. Text. Identity/. Similarity.
Chemical Element Data in PubChem. PubChem is providing this periodic table page in order to help navigate abundant chemical element data available in PubChem. When exploring the table or list views on this page, please note the links to dedicated pages for each element.
PubChem is a database of chemical molecules and their activities against biological assays. The system is maintained by the National Center for Biotechnology Information (NCBI), a component of the National Library of Medicine, which is part of the United States National Institutes of Health (NIH).
PubChem Structure Search allows the PubChem Compound Database to be queried by chemical structure or chemical structure pattern.
Learn about PubChem chemical database, browse or search the documentation and find PubChem staff contact information.
PubChem Compound records are derived summaries that give users access to a rich set of related content. Compound records contain unique chemical structures extracted from contributed Substance records through standardization.
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CID -- PubChem Compound Identification, a non-zero integer PubChem accession identifier for a unique chemical structure. For example, the CID of aspirin is 2244. Molecular Formula Input
Jan 1, 2016 · PubChem ( https://pubchem.ncbi.nlm.nih.gov) is a public repository for information on chemical substances and their biological activities, launched in 2004 as a component of the Molecular Libraries Roadmap Initiatives of the US National Institutes of Health (NIH).