Safety, Regulation & Controversy

Dibutyl phthalate

What happens when a chemical is successful for decades—and then science changes the questions we ask about it?

N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine

For years, scientists in the Pacific Northwest faced a strange mystery.

Dimethyl phthalate

Before DEET, people were already using chemistry to fight mosquitoes.