SEARCH Articles Figures Tables 1 -Amino-2-hydroxy-naphthalene— 1- amino-2-naphthalene sulfonic acid 13-naphthalene disulfonic acid, 7-Amino 6-amino-4-hydroxy-2-naphthalene-sulfonic 6-amino-4-hydroxy-2-naphthalene-sulfonic acid Amino-naphthalene sulfonates