sulfanilic acid

[ suhl-fuh-nil-ik, suhl- ]
/ ˈsʌl fəˈnɪl ɪk, ˌsʌl- /

noun Chemistry.

a grayish-white, crystalline, slightly water-soluble solid, the para form of C6H7NO3S, used chiefly as an intermediate in the manufacture of dyes.

Origin of sulfanilic acid

1855–60; sulf- + anilic (see anil, -ic)