Abstract: N-(aminobenzoyl)-aminoarylsulfonic acids and their alkali metal salts of the formula ##STR1## WHEREIN X is hydrogen, chlorine, bromine, lower alkyl, lower alkoxy, alkylamino, trifluoromethyl, phenyl, phenoxy, nitro or cyano, Y represents hydrogen, chlorine, bromine, lower alkyl or lower alkoxy, A is phenylene or naphthylene and n is 1 or 2, the sulfo group standing in 4-position to the benzoylamino group (which is in 1-position), are diazo components for the preparation of azo dyestuffs and the color toners and color lakes which may be obtained therefrom and which possess very good properties of fastness.

Abstract: Monoazo pigments of the general formula ##STR1## WHEREIN X is hydrogen or halogen, preferably chlorine or bromine, alkyl, alkoxy, trifluoromethyl, phenyl, phenoxy or cyano, Y represents hydrogen or halogen, preferably chlorine or bromine, alkyl, alkoxy, carbomethoxy, phenyl or phenoxy, Z represents hydrogen, chlorine or bromine, alkyl, alkoxy, nitro, cyano, trifluoromethyl, methylsulfonyl, aminocarbonyl, alkylaminocarbonyl, phenylaminocarbonyl, aminosulfonyl, alkylaminosulfonyl, alkanoylamino or aroylamino, A represents a phenyl or naphthalene ring, n represents 1 or 2, m is an integer of from 1 to 3 and Me is an equivalent of a metal cation forming a lake and a process for preparing them by diazotizing aromatic amines of the general formula ##STR2## with coupling components of the general formula ##STR3## AND SUBSEQUENTLY CONVERTING INTO A LAKE WITH METAL SALTS, X,Y,Z,A, n and m having the above meaning. These pigments can be successfully used for dyeing all materials usually dyed with pigments.