A class of organic compounds that contains a naphthalene moiety linked to a sulfonic
acid salt or ester.
https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=113746&nom=Acide+2-amino-1-naphtalènesulfonique Canada French naphthalenesulfonates 2-naphthylamine-1-sulfonic acid toxicological data sheet
--- https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=115956&nom=Acide+aminonaphtol+sulfonique Canada French naphthalenesulfonates 7-amino-4-hydroxy-2-naphthalenesulfonic acid toxicological data sheet