Chemistry: Property/reaction/structure searching

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Pub Chem

Pub Chem is an open chemistry database from the National Institutes of Health. 

It has information on chemical structures, identifiers, chemical and physical properties, biological activities, patents, health, safety, toxicity data, and many others. The resources below link out to specific aspects of PubChem. 

Online resources

Online Properties Handbooks

SciFinder

Additional Reactions content included:
•  more than 87,000 reactions from Organic Reactions dating from 1977-2006
•  approximately 63,000 reactions from the 2001 electronic Encyclopedia of Reagents for Organic Synthesis (EROS)
•  more than 5,200 reactions from Organic Syntheses dating from 1921-2006

Properties:
Here is a document listing and defining property data included in SciFinder.

PubChem Search


See the PubChem Factsheet for more information