The document compares the chemical properties and health effects of chlordane and hexachlorobutadiene. Chlordane is an amber-colored pesticide that was banned in the US due to its toxicity. It accumulates in fat tissues and causes nervous system, liver, and cancer risks. Hexachlorobutadiene is used in rubber compounds and solvents. It smells like turpentine and breaks down readily in soil, but can accumulate in fish and shellfish. Breathing or ingesting it poses risks such as nasal irritation, low birth weight, and liver and kidney damage. Both chemicals are suspected carcinogens.