Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 584-84-9, Whether you call it Tolylene-2,4-diisocyanate, 4-Methyl-1 -3-phenylene Diisocyanate , Toluene 2 -4-Diisocyanate , 4-Methyl-1 -3-phenylene Diisocyanate or Toluene 2 -4-Diisocyanate you can be assured the Tolylene-2,4-diisocyanate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.