Abstract: Mixed disulfoanthraquinonemono-, di-, or polycarboxylic acids produced by the direct sulfonation of an anthraquinone of the formula: ##STR1## wherein n is an integer of 1-4 and each R is independently selected from alkyl of 1-4 carbon atoms and chlorine with at least one R being alkyl and with the proviso that substitution in a single ring is limited to mono, di- or tri-substitution and substitution in two rings is limited to mono or di-substitution in each ring.The mixed disulfoanthraquinonemono-, di-, or polycarboxylic acids have exceptional utility in the Stretford Process.

Abstract: A process for preparing the compound, or dye, ##STR1## by forming aminoazobenzene employing a slight excess of sodium nitrite in the diazotization of aniline and, without isolation, diazotizing the monoazo base and coupling the diazonium salt into phenol.

Abstract: Azo dyes are provided and are the reaction product of diazotized 2-amino-5-nitrothiazole and a coupling component of the formula: ##STR1## wherein R.sub.1 is hydrogen or lower alkoxy;R.sub.2 is alkyl of 1-4 carbons, phenyl, tolyl or chlorophenyl;n is 1 or 2;The hydroxy alkyl groups being reacted prior or subsequent to coupling with at least stoichiometric qualities of certain acid halides and a mono- or di-lower alkyl formamide or acetamide.The resultant azo dye produces excellent dyeings on polyester fabric materials.

Abstract: A monoazo dye mixture which is the reaction product of the diazo base of 7-amino-4-nitrobenzotriazole and a coupling component of the formula ##STR1## wherein R.sub.1 is H or lower alkoxy; R.sub.2 is an alkyl radical having 1-4 carbon atoms, phenyl, tolyl, or chlorophenyl; and n has a value of 1-2. The hydroxyalkyl groups of the coupling component are reacted prior or subsequent to coupling with at least stoichiometric quantities of both: (1) a lower alkyl chlorocarbonate, lower alkanoyl chloride, benzoylchloride, methylbenzoylchloride, ethylbenzoyl chloride, phthaloyl chloride, isophthaloyl chloride, ter phthaloyl chloride or lower alkylsulfonyl chloride and (2) a mono- or di-lower alkyl formamide or acetamide, at a temperature of 30.degree.-100.degree. C until the reaction mixture is substantially free of unreacted hydroxyalkyl groups. The dye mixture produces excellent dyeings on polyester fabric materials.This is a division of application Ser. No. 374,771, filed June 28, 1973, now U.S. Pat. No. 3,860,389.

Abstract: Quaternized azo dyes made by coupling an appropriate diazotized benzenoid base with an N-dialkylaminoalkylene [.alpha.(N-alkylanilino)] m- or p-toluenesulfonamide. Quaternization of the pendant dialkylamino group of the coupling component is carried out before or after coupling. The water soluble quaternary azo dyes are especially useful for coloring acrylic fibers.

Abstract: Polyester fabrics and rigid plastic substrates are respectively dyed and colored with a series of compounds of the formula: ##SPC1##WhereinR is hydrogen, chlorine, bromine, nitro, or acetamidoA is lower alkyl, benzyl or cyano(lower alkly); each ofX and Y is independently cyano, lower carbalkoxyl, R.sub.1 CO OO R.sub.1 -SO.sub.2, R.sub.1 being a member selected from the group consisting of lower alkyl, chloro(lower alkyl), bromo(lower alkyl), cyano(lower alkyl), phenyl, (lower alkyl) phenyl, chlorophenyl, bromophenyl, nitrophenyl, cyanophenyl; andX and Y taken together with form a ring containing 5 or 6 ring carbon atoms.In addition a further series of compounds is provided of the formulaWhereinW is lower alkylene or p-xylylene;R is hydrogen, chlorine, bromine, nitro or acetamido; each ofX and Y is independently cyano, lower carbalkoxyl, R.sub.1 CO or R.sub.1 -SO.sub.2, R.sub.

Abstract: Polyester fibers, particularly poly(ethylene terephthalate), is dyed in bright, fast shades with p,p'"-dihydroxytrisazo compounds.