Abstract: The present invention concerns concentrated aqueous solutions of anionic disazo dyes, comprising salts and or the free acids of anionic dyes of the formula and 2-(2-butoxyethoxy) ethanol wherein the substituents are each as defined in claim 1 and the use of these solutions for dyeing and/or printing hydroxyl-containing substrates and for producing inkjet inks.

Abstract: The present invention concerns concentrated aqueous solutions of anionic disazo dyes, comprising salts and or the free acids of anionic dyes of the formula and 2-(2-butoxyethoxy) ethanol wherein the substituents are each as defined in claim 1 and the use of these solutions for dyeing and/or printing hydroxyl-containing substrates and for producing inkjet inks.

Abstract: 1:2-metal complex dyes of the formula wherein the symbols R1, R1?, R2, R2?, R3, R3?, Y, Z, n, n?, Me, M and (Kat)+ are defined as in the Claims, mixtures thereof, their compositions, their production and their use as anionic dyes for dyeing substrates, especially leather, in brown to red shades.

Abstract: 1:2-metal complex dyes of the formula 1

Abstract: Tetrakisazo dyes of formula (I), as defined in claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of leather in very intense dark shades.

Abstract: Azo dyes containing sulphur dye entities as a constitutional component are dyes of valuable properties, in particular for the dyeing of leather.

Abstract: A cationic dye (S.sub.K) comprising at least one quaternary ammonium group or protonated or protonizable tertiary amino group and at least one chromophoric radical, wherein the chromophoric radical is the radical of an optionally (pre)reduced sulphur dye, its precursor (S.sub.K1) containing a cationic group which is a secondary amino group of basic character, which is optionally protonated but does not contain an acid group in a substituent of this cationic group, or a mixture thereof and desolubilized derivatives thereof or of their non-quaternized and non-tertiary precursors, which in standardized form are usable as pigments.

Abstract: The invention provides a compound of formulaA--E--SO.sub.2 --NH--SO.sub.2 --E--A (I),whereineach --E--, independently, signifies a bivalent aromatic radical,each --A, independently, signifies a heterocyclic group of formula ##STR1## and the group --R.sub.1 --R.sub.2 -- signifies a 2- or 3-membered bridging chain to form, together with the group ##STR2## to which it is bound, a 5- or 6-membered heterocycle, with the proviso that the carbon indicated by the asterisk * is capable of being coupled with a diazonium compound,or a mixture of compounds of formula (I), and the use thereof as (bis)coupling components for the production of azodyes and metal complexes, which are useful as dyes, especially for the dyeing of leather.

Abstract: The invention provides a process for the production of azodyes and their derivatives by diazotization and coupling reactions and optionally further modification reactions, wherein a compound of formula ##STR1## in which E signifies an aromatic bivalent radical,X.sub.1 signifies hydroxy or a primary amino group,Y.sub.1 signifies hydroxy or a primary amino group and in which the aminogroup linked to the --SO.sub.2 -bound phenyl radical may optionally be acylated,or a mixture of compounds of formula (I), is employed as a coupling component or/and--in the non-acylated form--as a diazo component,the invention in particular relates also to the novel dyes and their use and to the novel intermediates.

Abstract: Mixtures of iron complexes of metallizable disazo compounds, at least one compound being of the formula ##STR1## and at least one compound being of the formula ##STR2## wherein the substituents have the meaning given in the specification, are useful for dyeing substrates dyeable with anionic dyes, e.g., leather.

Abstract: Tetrakisazo dyes of formula (I), as defined in claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of leather in very intense dark shades.