Glyphosate, an herbicide and the active ingredient in Monsanto Co's popular Roundup weed killer, will be added to California's list of chemicals known to cause cancer effective July 7, the state's Office of Environmental Health Hazard Assessment (OEHHA) said on Monday. Monsanto vowed to continue its legal fight against the designation, required under a state law known as Proposition 65. The listing is the latest legal setback for the seeds and chemicals company, which has faced increasing litigation over glyphosate since the World Health Organization's International Agency for Research on Cancer said that it is probably carcinogenic" in a controversial ruling in 2015. Dicamba, a weed killer designed for use with Monsanto's next generation of biotech crops, is [also] under scrutiny in Arkansas after the state's plant board voted last week to ban the chemical. OEHHA said the designation of glyphosate ... will proceed following an unsuccessful attempt by Monsanto to block the listing in trial court. Listing glyphosate as a known carcinogen ... would require companies selling the chemical in the state to add warning labels to packaging. Monsanto and other glyphosate producers would have roughly a year from the listing date to re-label products or remove them from store shelves if further legal challenges are lost.
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