certified reference material, in methanol (varied conc.), ampule of 1 mL
Synonym(s): Methylenediphenyl diisocyanate dibutylamine oligomers standard; p-MDI; polymeric-MDI
Components: 4,4'-MDI monomer-di-n-butylamine; 2,4-MDI monomer-di-n-butylamine; MDI trimer-di-n-butylamine; MDI tetramers-di-n-butylamine