Fluorone 9-phenyl

Test with 9-phenyl-2,3 7-trihydroxy-6-fluorone (phenyl fiuorone) ... 

Nutaksuka et al. [501] converted molybdenum to its molybdenum-phenyl-fluorone complex, then extracted the complex on a membrane filter prior to spectrophotometric determination on the membrane. 

Phenyl-3-fluorone [975-17-7] M 320.3, m >300°(dec), Xmax 462nm (e 4.06 x 10, in IM HCl aq EtOH). Recrystd from warm, acidified EtOH by addition of ammonia. The crude material (Ig) can be extracted with EtOH (50ml) in a Soxhlet apparatus for lOhr to remove impurities. Impurities can be detected by paper electrophoresis. [Petrova et al. Anal Lett 5 695 1972]. 

Turchini and Gosselin de Beaumont" reported the use of 9-phenyl-(or 9-methyl-) 2,6,7-trihydroxy-3-fluorone for the differential staining of ribo- and desoxyribo-nucleic acids. The former gives rise to a yellow-pink color and the latter to a bluish-violet tint. It is necessary to hydrolyze the nucleic acid since it is the pentoses thereby liberated which yield the color, indicating that the reagent differentiates between ribose and its 2-desoxy analogue. 

SODIUM SODIUM FLUORESCEIN SODIUM FLUORESCEINATE SODIUM SALT of HYDROXY-o-CARBOXY-PHENYL-FLUORONE SOLUBLE FLUORESCEIN SPIRO(ISOBENZOFURr N)-l(3H),9 -(9H)XANTHENE-3-ONE, 3, 6 -DIHYDROXY-DISODIUM SALT URANTN URANINE A EXTRA URANINE USP XII URANINE YELLOW 11824 YELLOW ... 

Mehrerc OH-Gruppen enthaltcn auch die Fluorone , von denen das Methyl- und insbesondere das Phenyl-Derivat Verwendung finden. 

Numerous techniques have been described to evaluate total tin on ashed or wet mineralized biological, food, or environmental media by colorimetric determination of tin(IV) with phenyl-fluorone [51-53], catechol violet [54-59], salicylaminothiophenol [60], hematoxylin [61], quercetin [62,63], dithizone [64], or dichloro-8-quinolinol [65]. In general, these analytical reagents are nonspecific and best suited to samples where tin values in materials are not lower than about 0.2 ppm. A better sensitivity may be obtained with fluorimetric methods using morin [66,67] or diacetylmonoxime nicotinylhydrazone [68]. 

Acetojty-l-methyl-bniaftnchiiion 18.140. PyrogaUolbenzein 8,1080,1S39 1811182. 6-0 y-9-r2.4.dio y.phenyl]-fluoron... 

Trioxy.9-phenyl-fluoron 18,199,1404. S. 4 -Dlozy-7.8-benzo-flavonol 18,199. 

Tetrabrom>6-ftthozy-9-[2-carb> ftthozy-phenyll-fluoron, chinoider Eoein-d thyi ther 18, 537. 

C2sHi2Br204 Dibromderivat des 9-[2.4-Dioxy-phenyl] 7.8-benzo-fluorons 18 II136. 

A pink precipitate or coloration is produced by the action of acid solutions of alkali germanates with the yellow alcohol solution of 9-phenyl-2,3,7-trihydroxy-6-fluorone (I). The composition of the reaction product is not known. In view of the phenolic nature of the dyestuff serving here as reagent, the possibility of ester formation as indicated by (II) is not excluded. Consideration must also be given to the production of an adsorption compound (color lake)2 between GeOa aq and (I). 

Reagent 0.06 % solution of 9-phenyl-2,3,7-trihydroxy-6-fluorone in 95 % alcohol, acidified with one drop oi % N hydrochloric acid. The solution is stable. 

Phenylfluorones are a variety of chelating xanthene molecules which form sparingly soluble coloured complexes with certain inorganic species. Phenyl-fluorone (2,6,7-Trihydroxy-9-phenyl-3H-xanthen-3-one) itself, for example, forms a reddish suspension with Ge(/V0, Ga(//7), Sn(iy), SB(//7) and other species. The coloured suspensions can be stabilized with a protective polymer such as poly(vinyl alcohol) for spectrophotometric measurement. 

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