CAS 621-00-1 appears in our catalog under these names: 1,3-Bis(4-tolyl)urea, 1，3–Bis(4–methylphenyl)urea, 4,4'-Ditolylurea, 1,3-Di-p-tolylurea, >98.0%(HPLC)(T), 1,3-Bis(4-methylphenyl)urea 97%. Offered by: Dr. Ehrenstorfer, GLPBio, Biosynth, TCI, Ambeed. Available pack sizes: 100mg, 1g, 250mg, 5g, 200mg.