Input (grade 13): The great majority of phosgene is used in the production of isocyanates, the most important being toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI).
Output (grade 7): Today, most phosgene is used to produce isocyanates. The most important isocanates in this context are toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI).