Reactive red 256 (C.I. 18211)

4-[4-Chloro-6-(ethylphenylamino)-s-triazin-2-ylamino]-5-hydroxy-6-(4-methyl-2-sulfophenylazo)-2,7-naphthalenedisulfonic acid trisodium salt

trisodium 5-[[4-chloro-6-(ethylphenylamino)-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(4-methyl-2-sulphonatophenyl)azo]naphthalene-2,7-disulphonate