A federal appeals court’s striking down of California’s proposed cancer warning for glyphosate—an ingredient in the weed killer Roundup—could embolden companies to challenge warning labels for other substances listed under the state’s Proposition 65, legal experts said.

“The glyphosate precedent is certainly going to be interesting and maybe applicable,” said Kelley, Drye & Warren partner Joe Green, who advises businesses on environmental regulatory matters. “It’ll come down to courts parsing the science and where different authoritative bodies have come down in their evaluations. And where there’s conflict, this could set a precedent for whether the state can mandate a warning where a chemical’s adverse effects are in question.”