- ad Spectra databases for analytical laboratories
- stjapan.de
- ATR, FT IR, and Raman Spectra of chemicals and other compounds. Includes polymers, solvents, forensics, etc.
- PubChem
- pubchem.ncbi.nlm.nih.gov
- Free database of chemical structures of small organic molecules and information on their biological activities. Linked with NIH PubMed/Entrez information retrieval system.
4.5
(si*)
>810
>80
7
- ChemSpider
- www.chemspider.com
- Free chemistry search engine which aggregates and indexes chemical structures and their associated information into a single searchable repository.
4.5
(si*)
>1880
-
8
- Chemical Abstracts Service (CAS)
- www.cas.org
- Produces the world's largest databases of chemical information.
4.4
(si*)
>550
>20
8
- The ChemExper Chemicals Directory
- www.chemexper.com
- A catalog of 60000 fine chemicals searchable for free using a chemist-friendly search engine.
4.1
(si*)
>120
-
6
- Synthetic Pages
- www.syntheticpages.org
- Free interactive database of practical and reliable organic, organometallic and inorganic chemical syntheses submitted by synthetic chemists.
4.0
(si*)
>30
-
7
- CCOHS: Web Information Services
- ccinfoweb.ccohs.ca
- Offers subscriptions to chemical databases as well as free access to Chemindex.
3.9
(si*)
<5
-
6
- Molecular Structure Center
- www.iumsc.indiana.edu
- Small molecule database of structures that have primarily been determined using single crystal X-ray diffraction. Features JAVA applets that can be used to orient and examine the molecule, and a dedicated Beowulf computer system to generate high quality rendered images. Currently contains over 2,500 molecules.
3.9
(si*)
-
-
6
- ChemBank
- chembank.med.harvard.edu
- Initiative for Chemical Genetics. Freely available collection of data about small molecules (over 2000 compounds) and resources for studying their properties, especially their effects on biology.
3.9
(si*)
-
-
5
- ChemExpo
- www.chemexpo.com
- News, stock reports, products, directories, classifieds, and profiles of commercially available chemical products; focus reports;
3.8
(si*)
<10
-
6
- CHEMnetBASE
- chemnetbase.com
- Online access to major chemical reference works from Chapman and Hall/CRC including Combined Chemical Dictionary (CCD), The Handbook of Chemistry and Physics, Polymers: A Property Database, Properties of Organic Compounds.
3.8
(si*)
>20
<5
7
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