Skip to Main Content
TOXNET® (TOXicology Data NETwork) is a group of databases covering chemicals and drugs, diseases and the environment, environmental health, occupational safety and health, poisoning, risk assessment and regulations, and toxicology. It is managed by the Toxicology and Environmental Health Information Program (TEHIP) in the Division of Specialized Information Services (SIS) of the National Library of Medicine (NLM).
The CHEMINDEX database is a convenient tool for finding information on over 200,000 distinct chemical substances in the CCOHS database collection. Search on CAS registry numbers, chemical names or name fragments.
ChemSpider is a free chemical structure database providing fast text and structure search access to over 58 million structures from hundreds of data sources.
A Publication of Reliable Methods for the preparation of Organic Compounds. Since 1921, Organic Syntheses has provided the chemistry community with detailed, reliable, and carefully checked procedures for the synthesis of organic compounds. Some procedures describe practical methods for the preparation of specific compounds of interest, while other procedures illustrate important synthetic methods with general utility.
Database of chemical molecules, including substance information, compound structures, and bioactivity data.
Science of Synthesis is an online synthetic methodology tool for chemical transformations. Written by chemists for chemists, SOS provides expert recommendations from over 1,750 contributors as well as unique insights into the scope and limitations of synthetic methods.
Tables of Physical and Chemical Constants
Curated by the UK National Physical Laboratory, this database contains thermodynamic, electrical, mechanical, and acoustical data and includes charts, tables, formulas, and graphs.