Chlorine Online
- Information about chlorine and its derivatives from Euro Chlor.
- http://www.eurochlor.org

ChemGlobe: Chlorine
- Electronic, thermal, and steric data along with basic information.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/17.html

LANL: Chlorine
- History, properties, uses, and handling.
- http://periodic.lanl.gov/elements/17.html

Wikipedia: Chlorine
- Properties of the element, including its history, applications, and characteristics.
- http://en.wikipedia.org/wiki/Chlorine

Lenntech: Chlorine
- Physical data, chemical properties, health and environmental effects.
- http://www.lenntech.com/Periodic-chart-elements/Cl-en.htm

EnvironmentalChemistry.com: Chlorine
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Cl.html

Especiál Gas Inc.: Chlorine
- Numeric data, uses, and general information.
- http://www.c-f-c.com/specgas_products/chlorine.htm

It's Elemental: Chlorine
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele017.html

ChemicalElements.com: Chlorine
- Basic information, atomic structure, and isotopes.
- http://www.chemicalelements.com/elements/cl.html

Visual Elements: Chlorine
- Image, animation, uses, biological role, and key isotopes.
- http://www.chemsoc.org/viselements/pages/chlorine.html