SEARCH Articles Figures Tables 1- Amino-2,4-dihydroxynaphthalene 1.2- Dihydroxynaphthalene-4-sulfonic acid 1.8- Dihydroxynaphthalene-3,6-disulfonic 1.8- dihydroxynaphthalene-3,6-disulphonic acid 2,3-Dihydroxynaphthalene complexes, with 2,7-Dihydroxynaphthalene, coupling 2,7-Dihydroxynaphthalenes, reaction 2- -1,8 -dihydroxynaphthalene-3 , 6-disulfonic acid 2.3- Dihydroxynaphthalene-6-sulfonic Dihydroxynaphthalenes Dihydroxynaphthalenes determination L,8-dihydroxynaphthalene-3,6-disulphonic