Abstract: Azo dyes of the formula ##STR1## and external salts thereof, wherein F is the residue of a monoazo or disazo compound in 1:1 metal complex form or of a trisazo, disazoazoxy or tetrakisazo compound in metal-free or 1:1 metal complex form,each X is independently --NR.sub.2 --Q--NR.sub.3 R.sub.4 or --NR.sub.2 --Q--N.sup..sym. R.sub.5 R.sub.6 R.sub.7,whereinQ is linear or branched C.sub.2-6 alkylene or --NH--CO--CH.sub.2 --,R.sub.2 is hydrogen or C.sub.1-4 alkyl,each of R.sub.3 and R.sub.4 is independently hydrogen; C.sub.1-6 alkyl; C.sub.2-6 alkyl monosubstituted by cyano or hydroxy in the 2-, 3-, 4-, 5- or 6-position; phenyl(C.sub.1-3 alkyl); phenyl(C.sub.1-3 alkyl) having, on the phenyl ring, 1, 2 or 3 substituents selected from chloro, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; C.sub.5-6 cycloalkyl or C.sub.5-6 cycloalkyl substituted by 1, 2 or 3 C.sub.1-4 alkyl groups or --NR.sub.3 R.sub.

Abstract: This invention relates to a disazo compound, a method for producing said disazo compound and an electrophotographic element containing said disazo compound, said disazo compound has the general formula (I), ##STR1## wherein Y represents a substituted or non-substituted cyclic hydrocarbon or substituted or non-substituted heterocycle; R represents hydrogen, substituted or non-substituted alkyl group, or substituted or non-substituted phenyl group; and Z represents a substituted or non-substituted cyclic hydrocarbon or heterocycle fused with phenyl nucleus.

Abstract: Photographic materials which comprise, on a base, at least one layer containing an azo dyestuff of the formula ##STR1## in which R.sub.1 is hydrogen, an alkylsulfone, halogen, cyano or nitro, R.sub.2 is hydrogen, halogen, cyano or nitro, R.sub.3 is hydrogen, alkyl, halogen, cyano or nitro, B.sub.1 is an aromatic ring system, K.sub.1 is an aromatic amine and m.sub.1 is 1 or 2.

Abstract: Compounds of the formula ##STR1## in which X.sub.1 is hydrogen, alkyl, alkoxy, --NL.sub.1 COM.sub.1, in which L.sub.1 is hydrogen or alkyl and M.sub.1 is alkyl or alkoxy, or is --NL.sub.1 P(O)(OG.sub.1).sub.2, in which G.sub.1 is alkyl, or is alkylsulfonamide or hydroxyl, Y.sub.1 is hydrogen, alkyl, alkoxy, carbalkoxy, N-alkyl-substituted or N,N-dialkyl-substituted amino or --NL.sub.2 COM.sub.2, in which L.sub.2 is hydrogen or alkyl and M.sub.2 is alkyl or alkoxy, Z.sub.1 is hydrogen, alkyl, alkoxy, --NL.sub.2 COM.sub.3, in which M.sub.3 is alkyl, or is carbalkoxy or halogen or represents those atoms which are required to form a ring with Y.sub.1, W.sub.1 is hydrogen, alkyl or alkoxy, R.sub.1 and R.sub.2 independently of one another are hydrogen, halogen, cyano, nitro or --SO.sub.2 U.sub.3, in which U.sub.3 is alkyl or phenyl, R.sub.3 is hydrogen or alkyl or, if R.sub.4 is a direct chemical bond, the two radicals R.sub.3 together are a link member and R.sub.

Abstract: Cationic polyazo dyestuffs which can be obtained by reacting diaminobenzene derivatives of the general formula ##STR1## wherein R represents hydrogen, C.sub.1 - to C.sub.4 -alkyl, C.sub.1 - to C.sub.4 -alkoxy or halogen,if appropriate in a mixture with up to 30% of aromatic monoamines of the formula ##STR2## wherein R.sup.2 represents hydrogen, C.sub.1 - to C.sub.4 -alkyl, C.sub.1 - to C.sub.4 -alkoxy, halogen or C.sub.1 - to C.sub.4 -acylamino and n represents 1 to 3,with 0.5 to 0.75 mole of a salt or ester of nitrous acid per mole of diamine and then with 1 to 4 moles of an alkylene oxide of the formula ##STR3## wherein R.sup.3 represents hydrogen or an optionally hydroxyl-, alkoxy- or halogen-substituted C.sub.1 - to C.sub.4 -alkyl radical,are used--preferably in the form of their solutions--for dyeing paper, leather and anionically modified synthetic fibres.