CAS 620-91-7 appears in our catalog under these names: N,N'-(p-Phenylene)ditoluidine (DTPD ), N1,N4-Di-p-tolylbenzene-1,4-diamine, >95% (HPLC), N1,N4-Di-p-tolylbenzene-1,4-diamine, 95%, 95%, N1,N4-Di-P-tolylbenzene-1,4-diamine, DTPD. Offered by: Chemat Brand, TRC, Chemat, MedChemExpress, HPC Standards. Available pack sizes: on request, 100mg, 10mg, 50mg, 25mg, 10 mg, 1 mg, 5 mg.