trisodium 4-hydroxy-3-[(2-sulphonatophenyl)azo]-5-[(2,5,6-trichloropyrimidin-4-yl)amino]naphthalene-2,7-disulphonate Drimarene Red Z 2B, 78% (HPLC) reactone red 2B REACTIVERED17 4-Hydroxy-3-[(2-sulfophenyl)azo]-5-[(2,5,6-trichloro-4-pyrimidinyl)amino]-2,7-naphthalenedisulfonic acid trisodium salt C.I.18155 C.I.Reactive Red 17 Drimarene Red Z 2B,78%