![]() ![]() ![]() At an average concentration of 0.67 oz (19 g) of chlorine in each liter of sea water, it is estimated that there are some 10 16 tons of chlorine in the world ’s oceans. In nature, chlorine is widely distributed over the Earth in the form of the salt ( sodium chloride) in sea water. an increase of almost 7% over 2003 figures. In 2004, according to the Chlorine Institute, more than 26 billion pounds (12 billion kilograms) of chlorine were produced in the U.S. In spite of its disagreeable nature, there are so many everyday products that contain chlorine or are manufactured through the use of chlorine that it is among the top ten chemicals produced in the United States each year. ![]() It was, in fact, one of the first poisonous gases used in warfare -in 1915 during World War I (1914 –1918). The average human body contains about 3.5 ounces (95 grams) of chlorine, primarily in the form of hydrochloric acid (HCl stomach acid), sodium chloride (NaCl), and potassium chloride (KCl).Ĭhlorine is a highly poisonous, greenish yellow gas, about two and a half times as dense as air, with a strong, sharp, choking odor. Ordinary chlorine is a mixture of 75.77% chlorine-35 atoms and 24.23% chlorine-37 atoms. It consists of two stable isotopes, of mass numbers 35 and 37. Chlorine is the non-metallic chemical element of atomic number 17, symbol Cl, atomic weight 35.45, melting point –149.8 ☏ ( –101 ☌), and boiling point –29.02 ☏( –33.9 ☌). ![]()
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