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Below are the best databases to begin your search for property data on your substance or material.
Single search for CRC's collection of chemical information databases. Includes CRC Handbook of Chemistry & Physics, Combined Chemical Dictionary, Properties of Organic Compounds, and Polymers: A Property Database.
You can locate property data for your compound through a substance search in the 165-million compound CAS Registry. Experimental and predicted data can be found in the substance record, with literature references for the experimental data. You can also search SciFinder by research topic, which can be helpful if you're searching for a broad group of properties and/or group of compounds, like enthalpy of halogenated benzenes
or mechanical properties of carbonitrides
. SciFinder requires a one-time registration
Database of 32 million compounds (plus another 110 million from PubChem and eMolecules), many with experimental property data. Every property fact is associated with at least one article or patent reference. The easiest way to search is by substance, then bring up the record and browse the available properties, including physical, electrical, chromatographic, magnetic, spectra, optical, and thermodynamic. You can also search by one or more properties using the query builder.
Collection of 8000+ handbooks and databases for chemistry and engineering, including a large number property data sources. From Material Property Search, enter your material/substance, then browse and select from the list of available properties grouped by category (electrical, mechanical, thermal/thermodynamic, etc.). Data is presented in interactive, downloadable tables, and in some cases interactive graphs. For chemicals, there's also the Open Chemicals Materials Search, NIST's database of thermodynamic data for 27,000 compounds. Click more to see some of the key titles.
Basic property data and key literature references for 11,500 significant chemical compounds. From here, you can also link over to your compound's record in ChemSpider to find more property data.
NIST Chemistry Webbook
Property data (including some spectral and thermodynamic) for hundreds of chemicals. Easy to search.