Naphthalene-1,3-disulfonic acid [6094-
26-4], C10H8O6S2, Mr 288.28, is produced
only in small proportion on disulfonation of
naphthalene and cannot be separated. It is prepared in good yield in the laboratory by diazotization and copper-catalyzed deamination of 2-
aminonaphthalene-6,8-disulfonic acid.
