By the early 1890s, the Pinkerton National Detective Agency employed more agents than there were members of the United States Army.
Iodine monochloride is the chemical compound with the formula ICl. It is a red-brown compound that melts near room temperature. Because of the difference in the electronegativity of iodine and chlorine, ICl is highly polar and behaves as a source of I+. Â»
Iodine itself is a poisonous gas, as are the related halogens chlorine, fluorine, and bromine. However, as with chlorine, the salts or negatively charged ions of iodine (iodides) are soluble in water, and iodine is essential to life in trace amounts.