An azo dyestuff of the formula: ##SPC1## Wherein R.sub.1 ' and R.sub.2 ' are each hydrogen, C.sub.1 -C.sub.4 -alkyl optionally interrupted by an oxygen atom and optionally substituted by phenyl, cyano, chlorine, bromine, fluorine, C.sub.1 -C.sub.4 -alkoxy, formylamino, formyloxy, C.sub.1 -C.sub.5 -alkylcarbonylamino, C.sub.1 -C.sub.5 -alkylcarbonyloxy, benzoyloxy, benzoylamino, C.sub.1 -C.sub.4 -alkylcarbamyloxy, phenylcarbamyl, C.sub.1 -C.sub.4 -alkyloxycarbonyloxy, phenoxycarbonyloxy, and phen...

Azo dyestuffs containing at least one group of formula --X--CO--NR--SO.sub.2 aryl, wherein R is hydrogen alkyl or cycloalkyl and X is an oxygen or sulphur atom or a group of formula --NR.sub.1 --, wherein R.sub.1 is hydrogen alkyl or cycloalkyl. The dyestuffs dye polyester fibers in fast shades.

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...

Disperse azo dyestuffs of the formula ##EQU1## where D is the residue of a diazo component of the benzene series, A is the residue of a coupling component of the aminobenzene series, R.sub. 1 is alkyl, which can be substituted, e.g. by CN, Cl, OH, alkoxy, etc., R.sub.2 is preferably alkylene, X is --NH--, --O-- or --S--, Y is preferably halogen, alkoxy, acyloxy, alkylcarbonyldioxy or alkylcarbamyloxy, R.sub.3 and ph are phenyl which can be substituted by nitro, halogen, alkyl or alkoxy and R.sub...

Claimed are compounds of formula (I) where the substituents are each as defined in the claims, their preparation, their use as dyes and as a ingredients of an ink-jet printing ink and also substrates dyed with such compounds. ##STR1##

A monoazo compound of the Formula (1) and salts thereof: ##STR1## wherein each of R.sup.1 and R.sup.2, independently, represents H, halogen, alkyl, alkoxy or acylamino; each of R.sup.3, R.sup.4 and R.sup.5, independently, represents H or optionally substituted hydrocarbyl other than groups comprising the residue --A'NR.sup.7 R.sup.8 wherein A represents an optionally substituted alkylene group containing 2 or more carbon atoms and each of R.sup.7 and R.sup.8, independently, represents H or optio...

A monoazo compound of the Formula (1) and salts thereof: ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3, independently, represents H, halogen, alkyl, alkoxy or acylamino, or R.sup.1 and R.sup.2 together form an optionally substituted benzo ring; L.sup.1 represents --OR.sup.4 , --SR.sub.4 or --NR.sup.5 R.sup.6 wherein each of R.sup.4, R.sup.5 and R.sup.6, independently, represents H or optionally substituted hydrocarbyl or R.sup.5 and R.sup.6 together with the attached nitrogen atom form a...

An azo pyrazolone compound of the formula: ##STR1## in the form of a salt, and its use as a pigment.

The invention provides novel monoazo compounds of the formula I ##STR1## wherein X is hydrogen or halogen, R is hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.1 is C.sub.1 -C.sub.8 alkyl, cycloalkyl or ##STR2## wherein the phenyl radical can be monosulfonated, and R.sub.2 is C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by a sulfo group, or is cycloalkyl, with the proviso that either R.sub.1 or R.sub.2 contains a sulfo group. The invention also provides a process for the production of ...

Monoazo dyestuffs having the general formula: ##STR1## in which the hydroxyl group is in the 2- or 4-position relative to the azo group and wherein R.sup.1 represents a hydrogen or halogen atom or an alkyl, cycloalkyl, aryl or alkoxy group and R.sup.2 represents a hydrogen atom or alkyl group. The dyestuffs are useful as acid dyes for nylon.