Abstract: Disclosed is a colorant composition of the formula wherein R is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and wherein R can be joined to the phenyl moiety to form a ring, R? is an aromatic- or heteroaromatic-containing group, each Ra, independently of the others, is a halogen atom, an alkyl group, an alkoxy group, a nitrile group, a nitro group, an amide group, or a sulfonamide group, w is an integer of 0, 1, 2, 3, or 4, n is an integer representing the number of carbon atoms in each repeat alkylene oxide unit, and x is an integer representing the number of repeat alkylene oxide units, wherein said colorant has no more than one —OH, —SH, or primary or secondary amino group per molecule.

Abstract: Disclosed is a colorant composition of the formula wherein R is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and wherein R can be joined to the phenyl moiety to form a ring, R? is an aromatic- or heteroaromatic-containing group, each Ra, independently of the others, is a halogen atom, an alkyl group, an alkoxy group, a nitrile group, a nitro group, an amide group, or a sulfonamide group, w is an integer of 0, 1, 2, 3, or 4, n is an integer representing the number of carbon atoms in each repeat alkylene oxide unit, and x is an integer representing the number of repeat alkylene oxide units, wherein said colorant has no more than one —OH, —SH, or primary or secondary amino group per molecule.

Abstract: Novel addition products of hydroxyl-protecting groups (such as isocyanates) with oxyalkylene-substituted intermediates, such as poly(oxyalkylenated) aniline compounds, for the eventual production of substituted, and substantially pure, colorants, particularly diazo and triphenylmethane derivatives, through the reaction of such intermediates with certain reactants are provided. These new colorants exhibit improved wax and/or oil solubility and high purity, particularly due to the inability of certain impurities to deleteriously react with the protected hydroxyl groups of either the intermediate or the colorant during and/or after formation thereof. A method for producing such novel colorants through utilization of these novel substantially pure colorant intermediates is also provided.

Abstract: Compounds known as "solid dispersed dyes" are synthesized in a two-phase system from which they disproportionate into a water-immiscible solvent phase, providing marker solutions. Marker solution is added to a petroleum fuel to introduce the compound thereto in dissolved form. Subsequently, extraction of the compound with acidic aqueous solution produces a chromophoric reaction which indicates presence of the compound in the petroleum fuel.

Abstract: Azo dyes useful for marking mineral oils have the formula ##STR1## where R.sup.1 and R.sup.2 are hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sup.3 is hydrogen or C.sub.1 -C.sub.8 -alkyl which may be substituted by hydroxyl and interrupted by from 1 to 3 oxygen atoms,R.sup.4 is C.sub.1 -C.sub.8 -alkyl which may be substituted by hydroxyl and interrupted by from 1 to 3 oxygen atoms, andX is cyano or substituted or unsubstituted C.sub.1 -C.sub.8 -alkoxycarbonyl,with the proviso that the molecule contains at least one hydroxyalkyl radical.

Abstract: 1. Dyestuffs for cyclic or straight polyfluoropolyoxyalkylenes, of general formula:Q[B--(A).sub.s ].sub.t (III)or[(Q).sub.s --B].sub.2 A (IV)where:Q=an organic group containing a chromophore group, free from free or salified sulphonic and/or carboxylic groups, and/or sulphon-amidic groups;A=a perfluorooxyalkylene chain, which is monovalent in formula (II) and divalent in formula (III);B=an organic at least divalent group;s, t=1 or 2, respectively.2. Compositions comprising cyclic or straight polyfluoropolyoxyalkylenes and at least a dyestuff of formula (III) or (IV) dissolved therein.

Abstract: Azo dyes of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently denote hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sup.4 denotes C.sub.1 -C.sub.6 -alkyl andR.sup.5 denotes C.sub.2 -C.sub.8 -alkyl which is substituted by hydroxy and may be interrupted by 1, 2 or 3 oxygen atoms,provided that the total number of carbon atoms in the radicals R.sup.4 and R.sup.5 is at least 5,mineral oils containing one or more of said novel dyes and the use of said dyes for marking mineral oils.

Abstract: A thermoplastic resin composition is provided which contains a thermoplastic resin and a colorant in the form of a polyalkyleneoxy-trifluoromethyl aniline colorant provided in said thermoplastic resin in a minor amount sufficient to provide coloration to said resin, said colorant having the formula: ##STR1## wherein R.sub.1 is selected from H, a lower alkyl group containing from 1 to about 10 carbon atoms, CH.sub.2 Cl, CH.sub.2 Br, CH.sub.2 OH, phenyl or ##STR2## wherein R.sub.4 is H or a lower alkyl group containing from 1 to about 9 carbon atoms; R.sub.2 is H, CF.sub.3, a lower alkyl group containing from 1 to about 9 carbon atoms, Cl or Br; R.sub.3 is an aromatic or heteroaromatic containing group, and n is an integer from 2 to about 75.

Abstract: Dye mixtures contain an oil-soluble dye and a dye of the formula ##STR1## where D is phenyl which is unsubstituted or substituted by methyl or methoxy, R is hydrogen or methyl, R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.2 is C.sub.3 - or C.sub.4 -alkyl.The mixtures according to the invention are preferably used for coloring and marking mineral oil products.

Abstract: A halftone gravure printing ink(A) about 2 to about 20% by weight of colorant,(B) about 10 to about 40% by weight of resin and(C) about 80 to about 50% by weight of solventwherein said colorant comprises azo dyestuff of the formula ##STR1## in which A.sub.1, A.sub.2 and A.sub.3 denote hydrogen, halogen, --CN, --NO.sub.2, C.sub.1 -C.sub.6 -alkyl, cycloalkyl, C.sub.1 -C.sub.18 -alkoxy, optionally substituted phenoxy, optionally substituted C.sub.1 -C.sub.18 -alkylsulphonyl, optionally substituted phenylsulphonyl, optionally substituted sulphamoyl, optionally substituted carbamoyl, optionally substituted phenylazo, C.sub.1 -C.sub.18 -alkoxycarbonyl, --CF.sub.3, --SCN, C.sub.1 -C.sub.12 -alkylmercapto, C.sub.1 -C.sub.6 -alkylcarbonyl, optionally substituted phenylcarbonyl or --OH,A.sub.4 and A.sub.5 denote hydrogen, halogen, optionally substituted C.sub.1 -C.sub.6 -alkyl, optionally substituted C.sub.1 -C.sub.6 -alkoxy, --NH--CO--CH.sub.2 CH.sub.2 OA.sub.8, --NH--CO--A.sub.8, --NH--SO.sub.2 --A.sub.

Abstract: Riboflavin of the formula I ##STR1## is prepared by condensation of a 4,5-dimethyl-N-(D)-ribityl-2-phenylazoaniline of the formula II ##STR2## where X is H, --Cl, --NO.sub.2 or --CH.sub.3 in the o- or p-position, with barbituric acid of the formula III ##STR3## in the presence of an acidic condensing agent in an inert organic solvent by an improved process in which the reaction is carried out in an aliphatic diol or triol derivative of the general formula IV ##STR4## where R.sup.1 is H or CH.sub.3, R.sup.2 is H or CH.sub.3 -- or, when n is 0, is CH.sub.3 --CO--O--CH.sub.2 --, R.sup.3 is CH.sub.3 --, C.sub.2 H.sub.5 -- or CH.sub.3 --, R.sup.4 is CH.sub.3 --CO--, or is H when R.sup.3 is CH.sub.3 -- or C.sub.2 H.sub.5 --, and n is 0 or 2, preferably 0, having a boiling point of 80.degree.-180.degree. C., or in a mixture of these as a solvent. In this process, the riboflavin is obtained in particularly pure form and in very good yields.

Abstract: An improved process for the preparation of riboflavin by condensation of a 4,5-dimethyl-N-(D)-ribityl-2-phenylazoaniline derivative with barbituric acid in the presence of an acidic condensing agent in an organic solvent, wherein a 4,5-dimethyl-N-(D)-ribityl-2-(o-alkoxyphenylazo)-aniline of the formula IIa ##STR1## where R is alkyl of 1 to 4 carbon atoms, in particular methyl, is reacted with barbituric acid, as well as the novel intermediates of the formula IIa.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is nitro or cyano;R.sub.2 is cyano or halo;R.sub.3 is C.sub.1-4 alkyl;R.sub.4 is methyl or ethyl;R.sub.5 is C.sub.1-8 alkyl; andR.sub.6 is --CH.sub.2 CHOHCH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.a R.sub.7, --CH.sub.2 CHOHC.sub.6 H.sub.5, --CH(C.sub.6 H.sub.5)CH.sub.2 OH; --(CH.sub.2).sub.n O--CO--NHR.sub.3, --CH.sub.2 CH(R.sub.4)--O--CO--NHR.sub.3 ; --(CH.sub.2).sub.n --O--CO--R.sub.3, --CH.sub.2 CH(R.sub.4)--O--CO--R.sub.3 or C.sub.2-4 hydroxyalkyl, with the provisos that R.sub.6 may be any of the last three groups only when R.sub.1 and R.sub.2 are both cyano and that R.sub.6 may be C.sub.2-4 hydroxyalkyl also when R.sub.5 is C.sub.1-2 alkyl,whereinR.sub.7 is phenyl; phenyl substituted by 1 or 2 substituents independently selected from hydroxy, chloro, bromo, methyl and C.sub.1-4 alkoxy; benzyl; benzyl substituted by 1 or 2 substituents independently selected from hydroxy, chloro, bromo, methyl and C.sub.