Free chemical structure search engine. Millions of public domain structures. Very fast substructure searching. Results link to data about these structures. Searching for chemical names and synonyms. Finding commercial sources of chemical compounds from vendors worldwide.

Chemical search engine powered by the Google Web API.

Database of organic compounds that have been identified in petroleum materials. Includes chromatographic separations, mass spectra, chemical structures, molecular weight, etc.

Data collections from Science, Technology and Medicine (STM): AntiBase (natural compound identifier), AmicBase (antimicrobial activity verifier), Mass Spectra (MS) of Pharmaceuticals and Agrochemicals, Infrared Spectra (IR) of Polymers.

Spectroscopic databases/libraries (mass spectrometry, NMR, and IR) and organic chemistry and reaction databases (Organic Reactions). Enterprise spectroscopy server software, Specinfo.

Free database containing thermochemistry data for over 400 compounds relevant to high-temperature processes used in materials synthesis. Searching by molecular formula.

Databases and software for thermochemistry.

Bibliography of infrared and Raman spectroscopy and its applications. Provides reference data (title, author(s), journal, page, date info.) collected from 123 journals, grouped into 129 classes.

Contains HPLC and GC applications provided by major vendors of chromatography equipment. Can be searched by numerous chromatographic parameters, as well as by structure, substructure, and structural similarity.

Database containing experimental LogP values together with 2D and calculated 3D structures of more than 500 chemical compounds.