3-(5-Chloro-2-hydroxyphenylazo)-4,5-dihydroxy-2,7-naphthalene disulfonic acid, disodium salt; C.I. 16680; Eriochrome Blue SE; plasmocorinth B (C.I. 16680); disodium 3-(5-chloro-2-hydroxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulphonate; Mordant Blue 13 (16680); Sunchromine fast blue MB; Eriochrom Blue SE; Mordant Blue 13 dihydrate; disodium (3Z)-3-[(5-chloro-2-hydroxyphenyl)hydrazono]-5-hydroxy-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate; disodium 3-[(E)-(5-chloro-2-hydroxyphenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate