ILO - International Occupational Safety and Health Information Centre (CIS) It contains information on occupational safety and health publications

Patty's encyclopaedia It is a well-known resource for information on recognition and evaluation of chemical agents, physical agents and biohazards in the workplace as well as engineering control of exposure and personal protection.

Ullmann's Encyclopedia of Industrial Chemistry It contains a broad (the largest) collection of references in the fields of: applied chemistry, industrial chemistry, and chemical engineering.

Kirk-Othmer Encyclopedia of Chemical Technology It contains a large number of articles on chemical substances, industrial processes and unit operations in chemical engineering.

EU IPPC This site presents all the reference documents that the European Integrated Pollution Prevention and Control (IPPC) Bureau utilizes.

SPIN - Substances in Preparations in Nordic Countries Database containing information about substances taken from all Nordic product registers (Denmark, Finland, Norway and Sweden).

OECD Resource centre for PRTR Release Estimation Techniques (RETs) The site provides manuals and documents on release estimation techniques available from the principal pollutant release and transfer registries developed by OECD member countries as well as links to PRTR guidance documents.

EPA Notebooks This site offers detailed information divided by industrial sectors and governments.