The boards of directors for DuPont and Dow Chemical have approved a $62-billion merger plan.
It has yet to achieve government approvals from a number of countries where both have significant operations.
The plan is that two years after the merger, there will be a division into three parts – for agriculture, for material science and for specialty products.
The chemical business, including pesticides and seeds, is in turmoil.
Bayer AG has made a bid to buy Monsanto.
ChemChina has bought Syngenta.