The following resources provide information regarding the chemical and physical properties of commonly used compounds and reagents. Depending on the resource, compounds can be searched for by name, CAS number, structure, physical properties, or other identifiers.
Since many chemicals used in lab are purchased through Sigma Aldrich, their catalog is an excellent resource for obtaining information on chemical and physical properties along with important safety information and complete material safety data sheets (MSDS).
ChemIDPlus Provides information on physical properties, toxicity, and regulatory information. Its upports compound searches by name, formula, structure, registry number, physical properties, and toxicity.