naphthalenesulfonic acid

noun
naph·​tha·​lene·​sul·​fon·​ic acid
variants: or chiefly British naphthalenesulphonic acid \ -​ˌsəl-​ˌfän-​ik-​, -​ˌfōn-​ How to pronounce naphthalenesulphonic acid (audio) \

Medical Definition of naphthalenesulfonic acid

: either of two crystalline acids C10H8SO3 obtained by sulfonation of naphthalene and used in the synthesis of dyes and naphthols