Alizarin-yellow

CA Index Name Benzoic acid, 2-hydroxy-5-[(4-nitrophenyl)azo]-CAS Registry Number 2243-76-7 Merck Index Number 255 Chemical Structure 

Chemical/Dye Class Azo Molecular Formula C13H9N3O5 Molecular Weight 287.23 pH Range 10.0-12.1 

Solubility Soluble in water, ethanol slightly soluble in acetone 

Boiling Point (Calcd.) 571.4 50.0°C Pressure 760 Torr Synthesis Synthetic methods  

Teuber, L. Dahl, B. H. A preparation of benzene derivatives, useful as KCNQ ehannel modulators. PCX InL Appl. WO 2004080377, 2004 Chem. Abstr. 2004,141, 295736. 

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Alizarin yellow R, sodium p-nitrobenzeneazosalicylate (indicator) dissolve 0.1 g in 100 mL water pH range yellow 10.1-violet 12.1. 

Rosolic acid, aurin, corallin, corallinphthalein, 4,4 -dihydroxy-fuchsone, 4,4 -dihydroxy-3-methyl-fuchsone (indicator) dissolve 0.5 g in 50 mL alcohol and dilute with water to 100 mL. Salicyl yellow (indicator) see alizarin yellow GG. 

A hydroxyl group is situated ortho to a carboxyl group which as a bidentate ligand is terminally metallized on the fiber when aftertreated with dichromate. An example is Alizarine Yellow GG [584-42-9] (50) (Cl Mordant Yellow 1 Cl 14025). Cr(III) has a coordination number of six, and therefore normally two dye molecules of the sahcyhc type are chelated to the metal ion. 

Alizarin yellow R p-Nitrobenzeneazosalicylic acid 10.1-12.1 Yellow Orange-red ... 

Since the pH changes very rapidly at the equivalence point, from about pH = 10 to about pH = 4, most of the indicators in Figure 18-6 can be used. The main exceptions are alizarin yellow R, bromophenol blue, thymol blue (in its acid range), and methyl violet. 

Indicator alizarin yellow R, yellow at pH = 10.0 and violet at pH = 12.0 The three titration curves are drawn with respect to the same axes in the diagram below. 

Thymol blue yellow Alizarin yellow yellow... 

Perlmutter-Hayman and Shinar (15, 16) have studied by temperature-jump the reactions of bases with different acid-base indicators having intramolecular hydrogen bonds. With Tropaeolin 0, direct attack of the base on the hydrogen bridge predominates according to their interpretation, whereas, for Alizarin Yellow G, the observed relaxation is ascribed chiefly to diffusion controlled reaction between the base and that part of the indicator present in the open form. Thus, data exist that lead one to doubt the generality of statement number 5. 

Crystal violet Thymol blue 2,4-Dinitrophenol Bromophenol blue Bromocresol green Methyl red Alizarin Bromothymol blue Phenol red Phenolphthalein Alizarin yellow R... 

Cresol red Crystal Violet Malachite Green Methanil Yellow Thymol Blue Orange IV -2,4-Dinitrophenol -Erythrosin, Na2 salt -Dimethyl Yellow Cl 11020 Bromophenol Blue Congo Red Cl 22120 Methyl Orange Bromocresol Green Alizarin Red S Cl 42750 Methyl Red Cl 13020 -Bromocresol Purple Chlorophenol Red p-Nitrophenol Alizarin Bromothymol Blue Brillant Yellow Phenol Red Neutral Red Cl 50040 -m-NItrophenol -Cresol Red Metacresol Purple Phenolphthalein -Thymolphthalein -P-Naphthyl Violet Alizarin Yellow R 2,4,6-T rinitrotoluene... 

Alizarin Yellow R [5-(4-nitrophenylazosalicylic acid). Mordant Orange 1] [2243-76-7] M... 

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