Methylene diphenyl diisocyanate (MDI) and methylene bisphenyl isocyanate refer to the same chemical compound, though MDI is the correct and more commonly used name. Both describe an organic compound with a methylene group linking two phenyl rings, each attached to an isocyanate group. MDI is DG Paystub widely used in the production of polyurethane products. While the terms are sometimes used interchangeably, "MDI" is the preferred nomenclature.
