Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 146-68-9, Whether you call it Iodonitrotetrazolium Violet, 2-(4-Iodophenyl)-3-(4-nitrophenyl)-5-phenyltetrazolium Chloride or INT you can be assured the Iodonitrotetrazolium Violet products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.