The most common compound of chlorine, sodium chloride, has been known since ancient times; … See more

Chlorine is the second halogen, being a nonmetal in group 17 of the periodic table. Its properties are thus similar to fluorine, bromine, and iodine, and are largely intermediate between those of the first two. Chlorine ha… See more

Chlorine is intermediate in reactivity between fluorine and bromine, and is one of the most reactive elements. Chlorine is a weaker oxidising agent than fluorine but a stronger one than bromine or iodine. This can be see… See more

Chlorine is too reactive to occur as the free element in nature but is very abundant in the form of its chloride salts. It is the twenty-first most abundant element in Earth's crust and makes up 126 parts per million of it, through th… See more

Chlorine is primarily produced by the chloralkali process, although non-chloralkali processes exist. Global 2006 production was estimated to be 65 million short tons. The most visible use of chlorine is in water disinfection. … See more