Monomeric diphenylmethane diisocyanate with high 2,4'-isomer content and stabilized against discoloration during storage. Formulation of prepolymers for use in one- and two-component polyurethane coatings and adhesives and in related applications. Desmodur2460 M is an isomeric mixture of monomeric diphenylmethane diisocyanate that is liquid at temperatures above 20 C. Storage and handling are greatly simplified compared to 4,4' isomer that is solid at room temperature (Desmodur 44 M,Desmodur 44 MC)