Abstract: Provided, amongst other things, are dyes of formula II: wherein R1, R2, R3 and R4 are independently H or alkyl, so long as one or more is alkyl, and salts of the compound of formula II. Methods of making, inks, surgical markers and methods of marking tissue and the like are further provided.

Abstract: The dyes of formula (1) according to claim 1 and the copper complexes of dyes of formula (2) according to claim 9 or the mixtures of mono-copper complex with the bis-copper complex are excellently suitable for dyeing paper with good light-fastness properties.

Abstract: Bis-diazo,triaryl and aryldiazo-N-arylphenazonium quencher moieties, substituted with electron-withdrawing and electron-donating substituents which induce polarity in the delocalized aryl/diazo ring systems, are useful as labels when attached to biomolecules such as polynucleotides, nucleosides, nucleotides, and polypeptides. The quencher moieties are non-fluorescent and accept energy from fluorescent reporter labels by any energy-transfer mechanism, such as FRET.

Abstract: Are disclosed disazo compounds represented by the general formula (1): ##STR1## wherein A represents a phenylene or naphthylene group which may be optionally substituted; each of R.sup.1 and R.sup.2 represent independently a hydrogen atom, an alkyl group or a phenyl group which may be optionally substituted; and m is 1 or 2. The compounds are highly water-soluble and are stable to long term storage. Ink compositions comprising the compounds of the invention can produce a printed image with full depth of shade and are excellent in resistance to water.

Abstract: A bisazo dye of Formula (1) and salts thereof: ##STR1## in which R is H or ##STR2## R.sub.1 and R.sub.2 each independently is H, optionally substituted C.sub.1-4 -alkyl or optionally substituted aryl;R.sub.3 and R.sub.5 together with the carbon atoms to which they are attached form a 5- or 6-membered carbocyclic ring which is optionally substituted by SO.sub.3 H;R.sub.4 is H;R.sub.6 is COOH;n is 1, 2 or 3; andp is 1, 2, 3 or 4.The dyes are useful for ink jet printing.

Abstract: A dye having a representative formula as follows and an ink providing waterfast printing having the dye, in which a surfactant is not essential: ##STR1##

Abstract: Dye compositions and aqueous inks derived therefrom, especially suitable for use in ink jet printing in which the dye composition contains (a) one or more dyes which, in the free acid form, are of Formula (1): ##STR1## wherein W is H or COOH;X is H or COOH;Y is H or COOH;U & Z are each independently H, COOH or SO.sub.3 H; andV is H or SO.sub.3 H;and (b) one or both dyes which in the free acid form is of Formula (2): ##STR2## wherein A is NH.sub.2 and B is OH; orA is OH and B is NH.sub.2.

Abstract: A dye which, in the free acid form, has the formula ##STR1## wherein W is COOHX is selected from H, COOH, SO.sub.3 H, halo, hydroxy, nitro, cyano, C.sub.1-6 -alkyl, C.sub.1-6 -alkoxy and C.sub.1-6 -acylamino;Y is H, COOH or SO.sub.3 H;Z is H, COOH or SO.sub.3 H;R & R.sup.1 are each independently H or C.sub.1-6 -alkyl substituted by 0, 1 or 2 --COOR.sup.2 groups; andR.sup.2 is H or C.sub.1-6 -alkyl;provided that there are at least two COOH groups and that the number of COOH groups is equal to or greater than the number of SO.sub.3 H groups.The dye is adapted for the preparation of inks for use in ink jet printing in which it displays high water-fastness on paper.

Abstract: Inks are provided comprising (a) at least two dyes corresponding to the formula ##STR1## wherein W is COOH,X is H, or COOH,Y is H, COOH, or SO.sub.3 H,Z is H, COOH, or SO.sub.3 H, andR is H, CH.sub.2 COOH, or CH.sub.2 CH.sub.2 COOH;with the proviso that there are at least two COOH groups and that the number of COOH groups is equal to or greater than the number of SO.sub.3 H groups, and (b) a solvent which may be water or a mixture of water and a water-soluble organic solvent provide excellent waterfast prints on paper. The inks preferably have a pH from about 7 to about 9.5. Also preferably, a phosphate is added to reduce kogation and a metal chelating agent is added to further reduce nozzle clogging.

Abstract: Coloring natural or synthetic fiber material containing hydroxyls or nitrogen is achieved by printing or dyeing the fiber material with a water-soluble disazo dyestuff of the formula ##STR1## wherein R.sup.1 is alkyl, alkoxy or alkoxyethoxy, each having 3-6 carbon atoms, B.sup.1 is the radical of a 1-amino-8-hydroxynaphthalene monosulphonic or disulphonic acid and B.sup.2 is the same as B.sup.1 or another napthyl moiety.

Abstract: Inks are provided comprising (a) a dye corresponding to the formula ##STR1## wherein W is COOH,X is H, or COOH,Y is H, COOH, or SO.sub.3 H,Z is H, COOH, or SO.sub.3 H, andR is H, CH.sub.2 COOH, or CH.sub.2 CH.sub.2 COOH;with the proviso that there are at least two COOH groups and that the number of COOH groups is equal to or greater than the number of SO.sub.3 groups, and (b) a solvent which may be water or a mixture of water and a water-soluble organic solvent provide excellent waterfast prints on paper. The inks preferably have a pH from about 7 to about 9.5.

Abstract: Recording liquid for ink jet recording systems containing dyestuffs of the formulae ##STR1## with the substituent definitions given in the description. They form high-contrast images of high fastness to water, light and abrasion.

Abstract: There are described novel yellow to red azo compounds of the formula I ##STR1## wherein each D independently of the other is the radical of an aromatic or heterocyclic diazo component, each Z independently of the other is hydrogen or a C.sub.1 -C.sub.4 -alkyl group or an acylamino group, Y is hydrogen or an unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl group, X is either the direct bond or C.sub.1 -C.sub.6 -alkylene, ##STR2## and n is a number from 2 to 6, preferably 2; and the substituent Y, in the case of an unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl group, can also be bonded to the o-position relative to the N atom of the phenylene group to form a six-membered ring, or both Y substituents can be linked together to form a C.sub.1 -C.sub.