Rosaniline hydrochloride

Preparation of SchlfT s reagent. Method 1. Dissolve 0- 2 g. of pure p.rosaniline hydrochloride in 20 ml. of a cold, freshly-prepared, saturated aqueous solution of sulphur dioxide allow the solution to stand for a few hours until it becomes colourless or pale yellow. Dilute the solution to 200 ml. and keep it in a tightly, stoppered bottle. If the bottle is not adequately stoppered, the reagent will gradually lose sulphur dioxide and the colour wUl return. The solution keeps well if not unnecessarily exposed to light and air. 

O. 2g of fuchsin(rosaniline hydrochloride) in hoc distd w( 120ml), cooling and addiqg this soln... 

The migration of water in teeth was tried to be visualized using fuchsine dye as a colorant ([103], rosaniline hydrochloride C19H17N3 HCI). Fresh human molars were immersed into a slightly acidic aqueous fuchsine solution. As was expected, the water penetrated fast via the nerve canal into the pulpa and especially the roots were dyed red from fuchsine migrating inwards as well from the sample surface as from the nerve canal. After several days, it could be observed that water had migrated into the gap between the enamel and the dentine (edj). Generally the intensity of the colour increased with time, and the dentine took up the colour more readily than the enamel. 

SchifPs Reagent, Modified Dissolve 200 mg of rosaniline hydrochloride (C20H20CIN3) in 120 mL of hot water. Cool, add 2 g of sodium bisulfite (NaHS03) followed by 2 mL of hydrochloric acid, and dilute to 200 mL with water. Store in a brown bottle at 15° or lower. 

A rapid test for glycol in motor oil involves testing colorimetrically for the formaldehyde product of the cleavage with p-rosaniline hydrochloride and sulfurous acid. A wine-colored, quinoid-type dye forms. 

Schiff s reagent is prepared by dissolving 0.1 g Basic Fuchsin (p-rosaniline hydrochloride) in too mL of water and then adding 4 mL of a saturated aqueous solution of sodium bisulfite. After I h add 2 mL of concentrated hydrochloric acid. 

C) Preparation of Rosaniline Hydrochloride (Fuchsine). Place an eight-inch test tube attached to a wire on a horn balance and... 

Sduff s fuchsin aldehyde reagent. Dissolve 1 g of fuchsin (p-rosaniline hydrochloride) in 200 ml of water, with gentle warming. Cool and saturate with sulfur dioxide. Allow to stand for several hours. Add 1 g of decolorizing carbon, shake, filter, and dilute with water to 1 liter. 

A manifold system for the simultaneous determination of CO2 and SO2 in wine, employing evaporation of the examined solution, diffusion through a hydrochloric membrane and reaction with / -rosaniline hydrochloride in the presence of formaldehyde has been described [3]. 

A manifold system for the simultaneous determination of SO2 and CO2 in wine has been described [2]. The reaction with p-rosaniline hydrochloride/formaldehyde makes a basis of spectrophotometric measurement (A. = 578 nm). 

Fuschin (Magenta I) See rosaniline hydrochloride in Aromatic Compounds , Chapter 4,... 

The decolorized fuchsin solution is a 0.1% acidic solution of basic fuchsin, which is a mixture of rosaniline hydrochloride (Figure 3.13.1) and para-rosaniline hydrochloride (Figure 3.13.2). 

To one such slide, a tissue dampened with 0.1 N HCl, 2% starch and 10% potassium iodide solution (made fresh daily) is applied. A weak color reaction, which is much stronger at the locations of charcoal flecks and any white droplets are potassium oxides and carbonate. A tissue overlay of hexamethylene rosaniline hydrochloride (crystal violet) is applied to another fresh slide. Bleaching and pH effects are observed. Other pH indicators and other peroxide sensitive solutions should be applied. The author finds that thickening the reagents with carbohydrate and polyvinyl alcohol to slow diffusion rates is advisable in some cases. 

Aminophenyl) (4-imino-2,5-cyclohexadien-1-ylidene) methyl) benzenamine monohydrochloride. See p-Rosaniline hydrochloride... 

Basic parafuchsin Basic parafuchsine. See p-Rosaniline hydrochloride Basic red 1... 

Hexamethyl p-rosaniline chloride Hexamethyl p-rosaniline hydrochloride Hexamethyl violet Methyirosaniline chloride Methyl violet Pararosaniline, N,N,N, N, N",N -hexamethyl-, chloride... 

Pararosaniline Rosaniline Rosaniline hydrochloride Rosanilinium chloride... 

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