As Dow and DuPont formally announced their merger, the two companies made clear that they intend to separate into three companies, a path that’s expected to be littered with complex deals, thousands of job cuts and months of government scrutiny.

What will emerge are three businesses: one specializing in agricultural chemicals, with $19 billion in pro forma sales last year; one in plastics and other materials, with $51 billion in annual revenue; and a third in specialty products like those for electronics and nutrition, which would have about $13 billion in annual sales.

Of those businesses, agriculture has received the most attention. Once combined, the two companies would command about 25 percent of the agriculture market, according to Argus Research.