Abstract: A dyestuff of the formula: ##STR1## IN WHICH --CH.dbd.CH--CO--Y is fixed in the 4 or 5 position, X is hydrogen or chlorine, Y is amino or alkoxy containing 1 to 4 carbon atoms, the p-phenylene nucleus A is unsubstituted or substituted by chlorine, alkyl containing 1 to 4 carbon atoms, alkoxy containing 1 to 4 carbon atoms, formylamino, acetylamino, propanoylamino, benzoylamino or cinnamoylamino, m is 0 or 1, and B represents the radical N-methyl (or ethyl)-4-hydroxy-2-oxo-quinolyl, 2-hydroxy-carbazolyl, 3-hydroxy-dibenzofuranyl, 2-phenylindolyl, N-methyl (or ethyl)-2-hydroxy-3-cyano-4-methyl-6-oxopyridyl, 3,6-dimethyl-4-hydroxy-1-phenyl-(4,5,-b)pyrazolopyridyl or the radical of formula: ##STR2## wherein R.sub.3 is hydrogen, methyl, alkoxycarbonyl, carbonamido or alkyl-substituted carbonamido and R.sub.

Abstract: Chromiferous complex dyestuff of the formula: ##STR1## in which A represents a hydrogen atom, an unsubstituted phenyl group or a phenyl group substituted by one or two halogen atoms or alkyl groups containing 1 to 4 carbon atoms and the nucleus B is unsubstituted or substituted by one or two chlorine atoms; salts of such dyestuff; process for the preparation of such a dyestuff which comprises reacting in equimolecular proportions the 1/1 chromiferous complex of a monoazo dyestuff of the formula: ##STR2## and a monoazo dyestuff of the formula: ##STR3## or, conversely, the 1/1 chromiferous complex of a monoazo dyestuff of formula (III) and a monoazo dyestuff of formula (II) wherein A and B have the meanings given above; process for the coloration or dyeing in bulk of a synthetic polyamide in which the coloring agent is a dyestuff of the formula given above or a salt thereof and materials and articles of synthetic polyamide dyed or colored in bulk by means of chromiferous complex of the formula given above or a

Abstract: Monoazo chromiferous dyestuff of the formula: ##STR1## in which A represents phenylene which is unsubstituted or monosubstituted by nitro, chloro or sulpho, or disubstituted by nitro and sulpho or chloro and sulpho or methyl and nitro or chloro and chloro, B represents 1-phenyl-3-methyl-5-pyrazolyl monosubstituted on the phenyl by sulpho, chloro or ethyl, ethylidene acetanilide, hydroxyquinolidene, hydroxyphenylene, naphthylene substituted by one sulpho or one methyl, one of A or B is substituted by sulpho, Y.sub.1 represents --O-- or ##STR2## Y.sub.2 represents --O-- or ##STR3## Y.sub.1 and Y.sub.2 are each in a vicinal position with respect to azo, and Z is water, ammonia and pyridine.

Abstract: Dyestuffs of the formula: ##STR1## in which R represents a methyl or ethyl group, R.sub.1 represents a substituted or unsubstituted alkyl group, R.sub.2 represents a hydrogen atom or a substituted or unsubstituted alkyl group, and the benzene nucleus A may be substituted, the molecule being free from groups causing solubility in water by the formation of ions; process for their preparation, process for the coloration of synthetic fibers by means of such dyestuffs, synthetic fibers colored by means of such dyestuffs and diazotizable amines of the formula: ##STR2## in which R represents a methyl or ethyl group.

Abstract: Monoazo chromiferous dyestuffs of the formula: ##STR1## in which A and B each represent a naphthalenic nucleus, one of the residues A and B carrying a sulphonic acid group, Y.sub.1 represents --O-- or ##STR2## Y.sub.2 represents --O-- or ##STR3## and Y.sub.1 and Y.sub.2 are each in a vicinal position with respect to the azo group, D is the residue of a .beta.-diketone bidentate chelating agent and Z represents water, ammonia or pyridine, and process for the preparation of such dyestuffs.

Abstract: Dyestuffs of the general formula: ##STR1## IN WHICH THE RADICAL --CH=--CN is fixed in the 4- or 5-position, X represents a hydrogen or chlorine atom, the benzene nucleus A is unsubstituted or substituted by at least one chlorine atom or alkyl, alkoxy or acylamino group, m is the number 0 or 1, and B represents the residue of a coupling compound containing no sulphonic or carboxylic acid group.The dyestuffs in which m represents zero may be prepared by diazotizing a base of the formula: ##STR2## and coupling the diazo derivative with a coupling compound BH wherein X and B have the same significance as set out above.The dyestuffs in which m is equal to 1 may be prepared by coupling the diazo derivative of a base of the formula: ##STR3## with an amine of the formula: ##STR4## diazotizing the amino-monoazo dyestuff thus obtained and coupling with a coupling compound BH wherein ##STR5## have the same significance as set out above. The dyestuffs may be used for the coloration of synthetic fibres.

Abstract: Dyestuffs of the general formula: ##STR1## in which the radical --CH=CH--CN is fixed in the 4- or 5- position, X represents a hydrogen or chlorine atom, the benzene nucleus A is unsubstituted or substituted by at least one chlorine atom or alkyl, alkoxy or acylamino group, m is the number 0 or 1, and B represents the residue of a coupling compound containing no sulphonic or carboxylic acid group.The dyestuffs in which m represents zero may be prepared by diazotizing a base of the formula: ##STR2## and coupling the diazo derivative with a coupling compound BH wherein X and B have the same significance as set out above.The dyestuffs in which m is equal to 1 may be prepared by coupling the diazo derivative of a base of the formula: ##STR3## with an amine of the formula: ##STR4## diazotizing the amino-monoazo dyestuff thus obtained and coupling with a coupling compound BH wherein ##STR5## have the same significance as set out above.

Abstract: The disazo compounds of the formula: ##SPC1##In which X is fixed in position 3 or 4 and represents ##EQU1## Y represents hydrogen, chlorine, methoxy or nitro and E represents the residue N-ethyl-N-(m or p-sulphobenzyl)-4-amino-phenyl or 4-phenyl-amino-5-sulpho-naphthyl(1).Process for the preparation of the disazo compounds claimed in claim 1 wherein .alpha.-naphthylamine is coupled with the diazo derivative of an amine of the formula: ##SPC2##In which X and Y have the same significance as in claim 1, the monoazo dyestuff thus obtained of the formula: ##SPC3##Is diazotised and the diazo-monoazo derivative is coupled with N-ethyl-N-(m- or p-sulphobenzyl)aniline or 1-phenyl-amino-naphthalene-8-sulphonic acid.