The US supreme court will hear arguments in a key pesticide regulation case on Monday, setting the stage for a ruling that could weaken the ability of consumers to sue companies for failing to warn of product risks.

The case centers on glyphosate – a weed-killing chemical used in the popular Roundup brand and numerous other herbicide products. The chemical has been scientifically linked to cancer in multiple studies, and was classified a probable human carcinogen by an arm of the World Health Organization in 2015.

Monsanto, the company that introduced glyphosate to the world in the 1970s and is now a part of the German conglomerate Bayer, has spent the last decade fighting more than 100,000 lawsuits claiming it failed to warn customers of cancer risks.

While maintaining that its products don’t cause cancer, Monsanto is asking the supreme court to rule that under the Federal Insecticide, Fungicide, and Rodenticide Act (Fifra), it cannot be held liable for failing to warn of a cancer risk if the…