TDI is the main raw material of polyurethane (PU), which is widely used in PU industry. But it is very toxic, only used in industry, not in daily life.

Because there are few manufacturers of TDI (at most, there are three or five in China), and the market demand is different in peak season and off season, the price will fluctuate greatly according to the market situation, generally around 18000-20000.