Isonate M 124 Isocyanate Dow Chemical PU - Isocyanates >> MDI, diphenylmethane diisocyanate >> Monomeric MDI Monomeric MDI ISONATE* M 124 is a white to lightyellow crystalline fused solid of high purity and low acidity containing approximately 98% 4,4'-diphenylmethane diisocyanate and 2% 2,4' diphenylmethane diisocyanate. ISONATE M 124 is used to manufacture of high-grade fibres, elastomers and elastoplastics. In addition, poromeric products for artificial leather applications are produced from ISONATE M 124 by reaction in solution. The high purity of ISONATE M 124 is reflected in the high toughness characteristics of the derived elastomers and fibres. Monomeric MDI. White to lightyellow crystalline fused solid of high purity and low acidity. Used to manufacture high-grade fibres, elastomers and elastoplastics. Provides good toughness. 4,4'-diphenylmethane diisocyanate: 98% 2,4'-diphenylmethane diisocyanate: 2%