Day 13: Cyanazine

Cyanazine was a very popular pesticide used in agriculture that can still be found in drinking water in areas with widespread farming activities.  Although there is a shortage of longitudinal studies on human health effects, it has been widely demonstrated to cause birth defects, reproductive disorders and mammary tumors in lab animals.  It is characterized as a Restricted Use Pesticide by the EPA, and because of it can interfere with normal embryonic development, and the maximum acceptable level set but he WHO is .6 parts per billion.

Cyanazine was first registered with the EPA in 1971 by the Shell company for use in agriculture as a pesticide.  By 1985, the absence of data surrounding the toxicity impact of Cyanazine was cited in order to require registered manufacturers to provide more data on its health and environmental effects.  In 1990, California listed Cyanazine as a chemical “known to the state to cause reproductive toxicity” and subsequently prohibited its use.  Because of concerns about its impact on reproductive health, and the lack of information about its cancer risks, DuPont & Griffin (its registered manufacturers) volunteered to phase out use of the pesticide in the United States in 2002.

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