2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-((4-(phenylamino)-5-sulfo-1-naphthalenyl)azo)-, compds. with N,N'-di(phenyl, tolyl and xylyl)guanidine(1:3) 2,7-Naphthalenedisulfonic acid, 5-((4-anilino-5-sulfo-1-naphthyl)azo)-4-hydroxy-, compd. with 1,3-di(phenyl, tolyl, and xylyl)guanidine (1:3) 71888-82-9 EINECS 276-156-0