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Properties of Chemical Substances
An open access database containing over 400 source materials that lists over 26 million substances.
An American Chemical Society (ACS) database of compounds with their Registry Numbers.
A National Library of Medicine chemical database of compounds, substances, and bioassays.
Information on fibers, metals, thermoplastics, plastics, and other engineering materials.
PTable Dynamic Periodic Table
Shows information about states, properties, isotopes, orbitals, compounds formed, and more.
Includes basic chemical information and YouTube videos when appropriate.