Orange Dye

Orange dye that gives on qiiaternizalion a new fast-ted dye oti acrylic fibers... 

Ah. the heterocychc coupling components that provide commercially important azo dyes contain only nitrogen as the hetero atom. They are indoles (31), pyrazolones (32), and especially pyridones (33) they provide yeUow to orange dyes for various substrates. 

Beta-carotene is one of the orange dyes found in most green leaves and in carrots. When leaves lose their chlorophyll in the fall, carotene is one of the colors left over in the leaf. 

CE is also potentially a useful alternative analytical tool for monitoring of chemicals (dyes, flame retardants and lubricants) involved in various steps of the textile fibre manufacturing process. In this area, CE compares favourably with existing techniques. CZE-MSn was used for the analysis of sulfonated azo dyes [942]. A variety of fluorescent analytes including thiazole orange dyes have been characterised by CE-FLNS [943]. 

Direct orange dyes, 9 402-403 Directories, standards and specifications, 15 769... 

In orange dyes of the haloheterocyclic type, the reactive system is invariably attached via the nitrogen of the ] acid coupler. In vinylsulphone dyes, on the other hand, it is normally more convenient to use as diazo component an intermediate such as 7.38 or 7.39 bearing the precursor grouping together with an N-acetylated derivative of ] acid or y acid as coupler, structure 7.93 being typical. 

The sensor reported by Shirai(69) used a natural carboxylic polyether antibiotic (Aem = 481 nm) for the detection of magnesium and calcium. Detection limits of I0 5 and KT4 M, respectively, were reported but, interference from other metals was difficult to overcome. Ishibashi(69) used a bulkier hexadecyl-acridine orange dye (Xem = 525 nm) plasticized in a PVC membrane for the fluorescent detection of ammonium ions. Signal interference due to superfluous ions and poor detection limits of KT5 M restricted the use of the probe. 

It is used for symptomatic relief of urinary burning sensation and urgency due to cystitis. It is a orange dye and excreted in urine. It has no antibacterial property. 

Yellow dyes are generally monoazo, and most are pyrazolone or pyri-done couplings. Orange dyes are generally monoazo derived from couplings to pyrazolones or of slightly substituted phenyl and naphthyl groups. 

Azo/hydrazone tautomerism was discovered in 1884 [3], The same orange dye was obtained by coupling benzenediazonium chloride with 1-naphthol and by condensing phenylhydrazine with 1,4-naphthoquinone. The expected products were the azo dye (62) (R=H) and the hydrazone (63) (R=H). It was correctly assumed that there was an equilibrium between the two forms, i.e., tautomerism. 

Amides of 3- or 6-hydroxy-2-naphthoic acid bearing dialkylaminoalkyl residues on the nitrogen atom lead to orange dyes for polyacrylonitrile or paper when coupled with diazotized aniline [20,21] or to red dyes, soluble in glycol ethers and useful for ink-jet printing, when coupled with diazotized 3-amino-4-methoxybenzenesulfonic acid AOV-dicthylam idc [22], and to substantive red dyes when the diazo component is a 2-(4 -aminophenyljbenzotriazole [23],... 

Introduction of an unsaturated alkyl residue improves the solubility of the dye [100], iV-Methyl- /V-cyanocthylaniline yields an orange dye. The shade is shifted to yellow with a red cast by using iV-cyanoethyl-2-chloroani 1 inc. 

If aromatic diamines are coupled to substituted 4-methyl-6-hydroxy-2-pyridi-nones [10] which contain a quaternary ammonium group (22) or primary, secondary, or tertiary amines (23), brilliant yellow to orange dyes are obtained. 

After the pH had been adjusted, 5 g of calcium carbonate, 5 ml of soybean oil antifoam and 0.020 g of Acridine Orange dye were added. The mixture was then autoclaved at 20 psi (250°F) for 15 minutes in order to sterilize the contents, before transferring the broth and mycelium thereto. 

The PG7 rocket is known to contain the following black powder, a mix containing RDX explosive, hydrocarbon wax and an orange dye, PETN explosive, a mercury fulminate primer containing zirconium (see particles... 

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