Chlorine, with the CAS number 7782-50-5, is a greenish-yellow gas at room temperature and is classified as a halogen in Group 17 of the periodic table. It has a distinctive, pungent odor and is highly reactive, readily forming compounds with a wide variety of elements, particularly metals and nonmetals. Chlorine exists as a diatomic molecule (Cl2) and is known for its strong oxidizing properties. It is soluble in water, where it can form a mixture of hydrochloric acid and hypochlorous acid, contributing to its use as a disinfectant and bleaching agent. Chlorine is also utilized in the production of various chemicals, including chlorinated solvents, plastics, and pesticides. Due to its reactivity, chlorine can be hazardous; it is toxic and can cause respiratory issues upon exposure. Safety measures are essential when handling chlorine, as it can form corrosive and harmful compounds. Overall, chlorine plays a significant role in both industrial applications and public health, particularly in water treatment processes.

Chlorine is a greenish-yellow, nonflammable
gas with a distinctive, pungent odor. It is almost
two and one-half times as heavy as air. The gas
acts as a severe irritant if inhaled. Chlorine liquid
has the color of clear amber and is about
one and one-half times as heavy as water. It is
shipped as a compressed liquefied gas having a
vapor pressure of 86.767 psig at 70°F (598.26
kPa at 21.1°C). Chlorine is nonflammable in
both gaseous and liquid states. However, like
oxygen, it is capable of supporting the combustion
of certain substances. Many organic chemicals
react readily with chlorine, in some cases
with explosive violence. Chlorine usually forms
univalent compounds, but it can combine with a
valence of 3, 4,5, or 7.
Chlorine is only slightly soluble in water.
When it reacts with pure water, weak solutions
of hydrochloric and hypochlorous acids are
formed. Chlorine hydrate (Cl2·8H20) may crystallize
below 49.3°F (9.61°C).

Chlorine

7782-50-5: Chlorine, with the CAS number 7782-50-5, is a greenish-yellow gas at room temperature and is classified as a halogen in Group 17 of the periodic table. It has a distinctive, pungent odor and is highly reactive, readily forming compounds with a wide variety of elements, particularly metals and nonmetals. Chlorine exists as a diatomic molecule (Cl2) and is known for its strong oxidizing properties. It is soluble in water, where it can form a mixture of hydrochloric acid and hypochlorous acid, contributing to its use as a disinfectant and bleaching agent. Chlorine is also utilized in the production of various chemicals, including chlorinated solvents, plastics, and pesticides. Due to its reactivity, chlorine can be hazardous; it is toxic and can cause respiratory issues upon exposure. Safety measures are essential when handling chlorine, as it can form corrosive and harmful compounds. Overall, chlorine plays a significant role in both industrial applications and public health, particularly in water treatment processes.

CAS 7782-50-5

Chlorine