Over 200 years ago, a young Swedish researcher, Carl Wilhelm Scheele, discovered chlorine. Because of its reactivity and bonding characteristics, chlorine has become an essential chemical building block, leading to a myriad of materials that are used to make the products we use every day for public health, safety, nutrition, security, transportation, lifestyle and high-tech innovation. Drinking water, agricultural abundance, disinfected wastewater, essential industrial chemicals, bleaches and fuels, all depend on chlorine. Pharmaceuticals, plastics, dyes, cosmetics, coatings, electronics, adhesives, clothing and automobile parts are examples of product groups that depend on chlorine chemistry.

Chlorine Applications

Benefits of Chlorine

Chlorine Release Fact Sheet

Chlorine Manufacture

Chemical Properties

Health Hazards

Other Hazards

Gaskets for Chlorine Service

Quarterly Chlorine Safety Newsletter


Packaged Chlorine

The safe handling, use, storage and actual packaging of chlorine in either cylinders or ton containers has always been an important part of the Chlorine Institute's safety mission. CI's 200 member companies represent the complete value chain-from chlorine producers to packagers, distributors, users and suppliers. The Institute's North American producer members account for a majority of the total chlorine production capacity of the U.S. and Canada. Packager members represent a significant percentage of the total U. S. market.


Resources for Packagers

The Chlorine Institute has developed a library of technical pamphlets and training resources specifically related to the safe handling and use of chlorine cylinders and ton containers, including:

  • Chlorine Basics (formerly The Chlorine Manual)
  • Packaging Plant Safety and Operational Guidelines
  • Guidelines for the Safe Motor Vehicular Transportation of Chlorine Cylinders & Ton Containers

These products can be ordered on this website in the CI Bookstore.


Proper Terms to Avoid Confusion

Please note that cylinders and ton containers have many similarities in the way in which they are handled and many users of cylinders also use ton containers. Therefore, they are considered together in discussions of chlorine packaging. However, the terms "cylinder," "ton cylinder" or "drum" should NOT be used to describe the ton container. Emergency equipment for handling ton containers is different from that used for cylinders and confusion can be avoided if proper terms are used.