C.I. 18159; C.I. Reactive Red 3; C.I. Reactive Red 3, trisodium salt (8CI); Procion Brilliant Red H 3B; trisodium (3Z)-5-{[4-chloro-6-(phenylamino)-1,3,5-triazin-2-yl]amino}-4-oxo-3-[(2-sulfonatophenyl)hydrazono]-3,4-dihydronaphthalene-2,7-disulfonate