Quinaldine Red

Other Names 2-[p-(Dimethylamino)styryl]-l-ethylquinolinium iodide Quinaldine Red Quinolin-ium, 2-[/ -(dimethyIainino)styryl]-l-ethyl-, iodide a-(p-Dimethylaminophenylethylene) quinoline ethiodide l-E(hyl-2-(p-diniethylaminostyryl)quinoline iodide 2-(p-Dimethylaminostyryl) quinoline ethiodide 2-[4-(Dimetliylamino)styryl]-l-ethylquinolinium iodide Eastman 1361 CA Index Name Quinolinium, 2-[2-[4-(dimetliylamino)phenyl]ethenyl]-l-ethyl-, iodide CAS Registry Number 117-92-0 Merck Index Number 8049 Chemical Structure 

Chemical/Dye Class Miscellaneous, Quinoline, Styryl Molecular Formula C21H23N2I Molecular Weight 430.33 pH Range 1.4-3.2 

Physical Form Very dark red or reddish-black powder Solubility Sparingly soluble in water freely soluble in ethanol UV-Visible (X J 528 nm Melting Point 241-243°C Synthesis Synthetic methodsi  

Major Applications Display device,5.6 photoresists, lithographic plates,. toner,io paints,n coating materials, 12 hair dye,i3 treatment of mechanical allodynia, regulation of cell proliferation,i5 diagnostic agents for diseases related with amyloid accumulation, treatment of virus infectious diseases, detecting enzyme activity, dental bleaching materialsi  

Antonious, M. S. Mahmoud, M. R. Guirguis, D. B. Solvent polarity indicators mass spectral properties of some styryl pyridinium and quinolinium salts. Am. Chim. 1993, 83, 457 60. 

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Murakami and co-workers12) have carried out one of the most thorough investigations of multi-armed compounds with ion-terminated chains. In 1979 they reported the substrate-binding behavior of an azaparacyclophane (16) in which the hydro-phobic cavity was deepened by substitution of long ion-terminated chains on the macrocyclic skeleton. Salient properties of the cyclophane (16) include (1) The compound has a critical micelle concentration of 3.2 x 10 4 M. (2) (16) binds cationic and neutral dyes but not anionic ones. Thus, Rhodamine 6G and Quinaldine Red form 1 1 complexes with (16) having association constants of about 5 x 103 M 1. 

Assay Transfer about 175 mg of sample, accurately weighed, into a clean, dry 200-mL Erlenmeyer flask add 75 mL of glacial acetic acid and dissolve by heating on a hot plate. Cool, add quinaldine red TS, and titrate with 0.1 A perchloric acid in glacial acetic acid, using a 10-mL microburet, to a colorless endpoint. Each milliliter of 0.1 A perchloric acid is equivalent to 23.42 mg of C6H11K07. 

Quinaldine Red TS Dissolve 100 mg of quinaldine red in 100 mL of glacial acetic acid. 

Quinaldine Red (5-Dimethylamino-2-strylethylquinolinium Iodide) A dark, blue-black powder, melting at about 260° with decomposition. Sparingly soluble in water freely soluble in alcohol. Transition interval from pH 1.4 (colorless) to... 

Into a second test tube is placed 4-9 c.c. of a sodium hydroxide solution approximately 0.01 N. The author has found that ordinary tap water may be used for a-, j8-, and -y-dinitrophenol and for quinaldine red. Comparison solutions of the methoxytri-phenylcarbinols are prepared in 0.1-0.5 N hydrochloric acid. A quantity of the same indicator, sufficient to produce a color approximately the same as that in the first tube, is then added. As a rule the stock solution of indicator will thus be diluted ten or twenty fold. It is best to employ for this purpose a burette graduated to 0.01 c.c. Then the solution is diluted with solvent (0.01 N NaOH, water, sodium carbonate, or hydrochloric acid, as the case may be) to the total volume of the first tube. The ratio of the quantity of indicator in the comparison solution and in the solution being studied is equal to the degree of coloration F. 

Nonaqueous titration in glacial acetic acid with O.OlN perchloric acid and Quinaldine Red or crystal violet indicator gave a neutralization equivalent to 259 (calc. 255.22). ... 

Amphotericin B could be regarded as a RR label and there is another example of where a RR label has been used to follow membrane properties. The second example involves the dye quinaldine red and the intact cells of the bacterium S. faecalis [80]. The RR spectrum of the free dye changes upon binding to the membranes of the resting (non-metabolising) cells and changes again when the cells... 

Hgure 2 Color transitions in acetic acid medium in the complementary chromaticity diagram if, gray point +, quinaldine red A, 4 -dimethylaminobenzalrhodanine O, metanil yellow if, tropaeolin 00 , brilliant green (gi, crystal violet , malachite green O, sudan III O, p-naphtholbenzein x, nile blue. 

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