Basic fuchsin

CAS 632-99-5 EINECS/ELINCS 211-189-6 Synonyms 4-[(4-Aminophenyl) (4-imino-2,5-cyclohexadien-1 -ylidene) methyl]-2-methylbenzenamine monohydrochloride Basic fuchsine Basic magenta Basic violet 14 monohydrochloride Benzenamine, 4-((4-aminophenyl) (4-imino-2,5-cyclohexadien-1 -ylidene) methyl)-2-methyl-, monohydrochloride Cl 42510 Diabasic magenta Fuchsine Magenta 2-Methyl-4,4 -[(4-imino-2,5-cyclohexadien-1-ylidene) methylene] dianiline hydrochloride... 

Production of coal-tar dyes developed dramatically on the European continent too, following Perkin s discovery. In Lyons in 1859, Francois Emanuel Verguin produced the red-violet fuchsin (Basic Violet 14) by oxidation of technical aniline, a mixture of aniline and toluidines. This dyestuff provided the basis for the production of coal-tar dyestuffs in France it is still important today. At the World Exhibition in London in 1862, the coal-tar dyestuffs industry celebrated great triumphs. The thirteen prize winners were almost exclusively English and French dye manufacturers. 

We also found that the two peaks were actually oppositely polarized. They had an elliptical polarization with the ratio of the two circularly polarized components being 5 1. The theoretical ratio, derived from Eq. (8) or (15) is 4.8. Comparison of the phase-matched third-harmonic signals from the liquid crystal and from the fuchsin basic dye solution yields 0.1. We also measured the... 

Srivastava, S. J. Singh, N. D. Sinha, R. Srivastava, A. K. Acute toxicity of fuchsin basic (magenta) and its effects on blood parameters of a freshwater catfish, Heteropneustes fossilis (Bloch). J. Adv. Zool. 1996, 17, 38-43. 

The first triaryknethane dyes were synthesized on a strictiy empirical basis in the late 1850s an example is fuchsine, which was prepared from the reaction of vinyl chloride with aniline. Thek stmctural relationship to triphenylmethane was estabHshed by Otto and Fmil Fischer (5) with the identification of pararosaniline [569-61-9] as 4,4, 4 -triaminotriphenyknethane and the stmctural elucidation of fuchsine. Several different stmctures have been assigned to the triaryknethane dyes (6—8), but none accounts precisely for the observed spectral characteristics. The triaryknethane dyes are therefore generally considered to be resonance hybrids. However, for convenience, usually only one hybrid is indicated, as shown for crystal violet [548-62-9] Cl Basic Violet 3 (1), for which = 589 nm. 

In a variation of this method, isolation of the ben2hydrol derivative is not required. The methane base undergoes oxidative condensation in the presence of acid with the same or a different arylamine direcdy to the dye. New fuchsine [3248-91 -7] Cl Basic Violet 2 (16), is prepared by condensation of two moles of o-toluidine with formaldehyde in nitrobenzene in the presence of iron salts to give the corresponding substituted diphenylmethane base. This base is also not isolated, but undergoes an oxidative condensation with another mole of o-toluidine to produce the dye. 

In the present work the acid-base surface properties of three Al O samples for a chromatography are investigated acidic (I), basic (II) and neutral (III) ones with the using of heterogeneous titration of their suspensions by HCl and NaOH solutions. To establish the correlations between the acid-base and adsoi ption properties studied Al O the representatives of cationic dyes -diamond green (DG), fuchsine (F) and anionic dyes - eriochrom black T and chromic dark blue have been used. 

The cell wall has a low affinity for dyes, which means that it is probably not stained in some of the usual staining procedures. It is lightly stained by certain basic dyes such as basic fuchsin and the methyl violets. Where deep staining of the wall is desired, the use of a mordant, such as tannic acid, is necessary. The mordant not only increases the affinity of the cell for dye, but it may increase the thickness of the wall. 

Pennington (1949) revealed the presence of polysaccharides by treating bacteria with sodium metaperiodate followed by staining with sulfitedecolorized basic fuchsin. In Bacillus cereus the polysaccharide was concentrated in the cytoplasmic membrane as well as in the cell wall. 

The Smith technique consisted of fixing the smear in osmium tetroxide vapor, immersion in HCI, mordanting in dilute formaldehyde, and staining with aqueous basic fuchsin. The method was said to possess certain advantages over the procedure of Robinow. 

Basic fuchsin [569-61-9 632-99-5] 338C, I(2)963B, U126, 129 CX9850000,... 

Basic fuchsin (rosaniline, basic violet 14) or Pyronin Y are suitable as tracking dye. 

If the wine is genuine, the ether remains colourless even after addition of acetic acid coloration of the ether before or after acidification indicates the. presence in the wine of artificial organic colouring matters of basic character (fuchsine, etc.). 

PAS (periodic acid Schiff) stain is used for the histological staining of carbohydrates it is also used to stain glycoproteins (proteins that contain carbohydrates Chap. 2) in electrophoretic gels (Chap. 4). The stain mixture contains periodic acid (HI04), a powerful oxidant, and the dye basic fuchsin ... 

The conversion of ring A of basic fuchsin to an aromatic one, with a carbocation (positively charged carbon atom) at the central carbon, renders the compound pink. 

Basic Mauve or Aniline Purple, Perkin, 1856 Fuchsin, Verguin, 1859... 

Fuchsin-Sulfurous Acid TS Dissolve 200 mg of basic fuchsin in 120 mL of hot water, and allow the solution to cool. Add a solution of 2 g of anhydrous sodium sulfite in... 

Starch Variety Fuchsin Acidic Basic Methyl Violet Methylene Blue Congo Red Eosin... 

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