The Chlorine Institute
- Supports the chlor-alkali industry and serves the public by fostering the continuous evaluation of and improvements to the production, distribution and use of chlorine, sodium hypochlorite, and hydrogen chloride.
- http://www.chlorineinstitute.org

Canadian Chlorine Coordinating Committee
- Promotes dialog and coordinated action in Canada among to enable society to make informed, science-based decisions on issues involving chlorine. Includes position papers and scientific studies.
- http://cfour.org/cms/

The Alliance for the Responsible Use of Chlorine Chemistry
- A labor-management forum for the open exchange of information and opinion on issues affecting employment and investment in U.S. chlorine chemistry industries.
- http://www.chlorallies.org/

Clorosur
- Provides South American chlor-alkali and derivatives producers and consumers with a forum representing their interests, permitting consistent communication and information exchange. [English/Spanish/Portuguese]
- http://www.clorosur.org/

World Chlorine Council
- Represents the global chlorine and chlorinated products industries, and was created to improve our understanding of the benefits of chlorine chemistry and to address related health, environmental and public policy issues.
- http://worldchlorine.com/

Chlorine Chemistry Council
- Information about the uses of chlorine and the benefits of chlorine chemistry.
- http://www.c3.org/