Monday a federal judge prohibited California from labeling the weed-killer Roundup with a cancer warning.
U.S. District Judge William Shubb issued a permanent injunction against the labeling, saying the state was unable to meet a legal standard, the San Francisco Chronicle reported.
According to California's Safe Drinking Water and Toxic Enforcement Act, approved by voters in 1986, warning labels on cancer-causing products are required by law.
Glyphosate, the main ingredient in Monsanto's Roundup, was deemed a probable cause of cancer in a 2015 finding by the International Agency for Research on Cancer, a division of the World Health Organization.
But in 2018, Monsanto sued and Judge Shubb temporarily blocked the warning label, saying the U.S. Environmental Protection Agency and similar agencies in Europe haven't found a connection between the chemical and cancer.
"The great weight of evidence indicates that glyphosate is not known to cause cancer," the judge said.
Monsanto maintains that Roundup is safe but is facing thousands of lawsuits.
In August of 2018, a San Francisco jury ordered Monsanto to pay $289 million to a former school groundskeeper dying of cancer, saying the company's popular Roundup weed killer contributed to his disease.
Edwin Hardeman, 70, was the second plaintiff to go to trial out of thousands around the country who claim the weed killer causes cancer.
The verdicts are being appealed.
Monsanto's parent company is Bayer.