129-96-4 148-25-4 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-, disodium salt 388633-48-5 Chromotropic acid disodium salt Disodium 1,8-dihydroxylnaphthalene-3,6-disulfonate Disodium 4,5-dihydroxynaphthalene-2,7-disulphonate Disodium chromotropate Disodium naphthalene 1,8-dihydroxy-3,6-disulfonate Disodium-1,8-dihydroxynaphthalene-3,6-disulfonate EINECS 204-972-9 NSC 4883 Sodium 1,8-dioxynaphthalene-3,6-disulfonate Sodium chromotropate