Carbon tetrachloride, also called tetrachloromethane, a colourless, dense, highly toxic, volatile, nonflammable liquid possessing a characteristic odour and belonging to the family of organic halogen compounds, used principally in the manufacture of dichlorodifluoromethane. Carbon tetrachloride is commonly used as a chemical intermediate, solvent, and dry-cleaning fluid. It was widely used as a cleaning fluid. Carbon tetrachloride was also used in fire extinguishers and as a fumigant to kill insects in grain. Human exposure to carbon tetrachloride from occupational or environmental sources is low and unlikely to produce acute kidney toxicity. Carbon tetrachloride is a manufactured chemical and does not occur naturally in the environment.

Endrin is an organochlorine pesticide used as a non-systemic insecticide, acaricide, and rodenticide for protecting grain. As a central spasmodic agent, endrin is highly toxic to humans and skin resorption is possible. Endrin is rapidly metabolized by animals and does not accumulate in fat to the same extent as other compounds with similar structures. Endrin is also damaging to the liver, kidneys and central nervous system.