Adjective apply to organic compounds of carbon, hydrogen, and chlorine; some of these compounds are natural and are present in alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids; others are artificial to replace hydrogen atoms with chlorine and are used for different purposes such as drugs, solvents and pesticides, although the latter, organochlorine pesticides, are currently prohibited because they are harmful to living things accumulate in them, the food cademas and groundwater.