4,5-Dihydroxynaphthalene-2,7-disulfonic acid 148-25-4 NSC 37043 CHEBI:1751 AIDS-000369 AIDS000369 C11323 Chromotropic acid 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy- 4,5-Dihydroxy-2,7-naphthalenedisulfonic acid SBB001312 AI3-18239 EINECS 205-712-7 4,5-Dihydroxynaphthalene-2,7-disulphonic acid