DuPont is a diversified set of businesses . Of course, there's the chemicals business, but it's best to look at DD as a sort of technology firm. Their products are used in the agriculture, nutrition, energy, construction, safety, and apparel industries just to name a few. They are now stepping up their presence in the solar power space.
This stock is cheaper than the market on an earnings and price to cash flow basis: it is growing profits at a healthy clip. It has a good dividend yield. The debt/equity is ratio is quite high though it is inline with the industry.