Bordwell pKa Table Provides equilibrium constants for many organic compounds with pKa values from 0-35 in DMSO. Common Organic Solvents: Table of Properties MSDS Search - University of Portland Log into PilotsUP and choose the Material Safety icon under QuickLinks. Has Material Safety Data Sheets for chemicals used on campus. NIST Chemistry WebBook Chemical, physical and spectroscopic data on many substances. Maintained by the National Institute of Standards and Technology. Organic Syntheses Searchable, online version of Organic Syntheses series, which details reliable experimental methods for the synthesis of organic compounds. Periodic Table Interactive table of the elements that includes descriptions, properties, uses, plus short podcasts and videos. PubChem Physical property and biological activity information for small organic molecules provided by the National Center for Biotechnology Information. Sigma-Aldrich Online database from supplier of 85,000 biochemicals and organic chemicals. Provides chemical properties and Material Safety Data Sheets. Spectral Database for Organic Compounds SDBS Provides 6 types of spectra (including CNMR, HNMR, IR) for commercial chemical reagents.