reaction mass of: 3-[5-(4-ethenesulfonylbutyrylamino)-2-sulfophenylazo{]-5-4-chloro-[}6-(4-(3-amino-5-hydroxy-2,7-disulfonaphthalene-4-ylazo)-3-sulfophenylamino{]-1,3,5-triazin-2-ylamino[}-4-hydroxynaphthalene-2,7-disulfonic acid, sodium salt; 3-[5-(4-(2-chloroethanesulfonyl)butyrylamino)-2-sulfophenylazo{]-5-4-chloro-[}6-(4-(3-amino-5-hydroxy-2,7-disulfonaphthalene-4-ylazo)-3-sulfophenylamino{]-1,3,5-triazin-2-ylamino[}-4-hydroxynaphthalene-2,7-disulfonic acid, sodium salt