Chocolate Brown HT (Technical Grade)

1-Naphthalenesulfonic acid, 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(2,1-diazenediyl)]bis-, sodium salt (1:2); 1-Naphthalenesulfonic acid, 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bis-, disodium salt (9CI); C.I. Food Brown 3 (7CI); C.I. Food Brown 3, disodium salt (8CI); 1538 Brown; Brown HT; C.I. 20285; Certicol Brown N Extra; Certicol Brown RS; Chocolate Brown HT; E 155; Edicol Brown HT; Hexacol Chocolate Brown HT

InChI=1S/C27H20N4O9S2.2Na/c32-14-15-13-22(30-28-20-9-11-23(41(35,36)37)18-7-3-1-5-16(18)20)27(34)25(26(15)33)31-29-21-10-12-24(42(38,39)40)19-8-4-2-6-17(19)21;;/h1-13,32-34H,14H2,(H,35,36,37)(H,38,39,40);;/q;2*+1/p-2/b30-28+,31-29+;;