Methylene blue chloride

C.I. 52015 (CZECH) C.I. BASIC BLUE 9 D C BLUE NUMBER 1 EXTERNAL BLUE 1 HIDACO METHYLENE BLUE SALT FREE LEATHER PURE BLUE HB METHYLENE BLUE METHYLENE BLUE A METHYLENE BLUE BB METHYLENE BLUE BB ZINC FREE METHYLENE BLUE CHLORIDE METHYLENE BLUE CHLORIDE (biological stain) METHYLENE BLUE D METHYLENE BLUE (medicinal)... 

The solution contains equilibrium concentrations of Methylene Blue chloride, Methylene Blue hydroxide, and hydrochloric acid, together with ions of hydrogen, chloride, and dye. Difficulties in analytical procedures prevent quantitative measurements of the amount adsorbed in each form, but it is possible to gain a reasonably clear picture of the over-all mechanism. Small portions of carbon sufficient for partial decolorizing of the solution cause an increase in the amount of free hydrochloric acid. This is interpreted as indicating that at least part of the dye is adsorbed as ROH, shown on the right-hand side of the equation (R is dye radical) this upsets the equilibrium which is restored by further hydrolysis of dye, a process that simultaneously produces more free HC1. Actually, some HC1 is adsorbed but the amount adsorbed does not equal that set free by the hydrolysis. 

Dissolve 0.3g methylene blue chloride in 30mL of 95% v/v ethanol. 

Methylene Blue chloride Methylene Blue Methylene Blue polychrome Methylenium ceruleum Methylthio-nine chloride Methylthioninium chloride Mitsui Methylene Blue NSC 617593 Sandocryl Blue BRL Schultz 1038 Solvent Blue 8 Swiss blue Tetramethylthionine Tetramethylthionine chloride Urolene Blue Yamamoto Methylene Blue B Yamamoto Methylene Blue ZF Merck Index Number 6060 Chemical/Dye Class Phenothiazine Molecular Formula CieHigClNsS Molecular Weight 319.85 Physical Form Green powder... 

Buehring, G. C. Jensen, H. M. Lack of toxicity of methylene blue chloride to supravitally stained human mammary tissues. Cancer Res. 1983, 43, 6039-6044. 

Warm a few of the crystals with yellow ammonium sulphide solution for a few minutes, acidify with hydrochloric acid, und finally add a little feiric chloride. A deep blue colouration Ls produced, due to the formation of methylene blue. 

Methyl-arsonsaure, /. methylarsonic (meth-anearsonic) acid, -ather, m. methyl ether, -blau, n. methyl blue, -chlorid, -chlordr, n. methyl chloride, chloromethane. Methylen-blsu, n. methylene blue, -gruppe, /. methylene group, -jodid, n. methylene iodide, diiodomethane. 

An early method developed for the assay of detergents based upon the sodium salts of the higher homologues of the alkanesulphonic acids,21 involved treatment of an aqueous solution of the detergent with methylene blue in the presence of chloroform. Reaction takes place between the ionic dyestuff (which is a chloride) and the detergent ... 

Other detection methods are based on optical transmittance [228-231], Alcohol sulfates have been determined by spectrophotometric titration with barium chloride in aqueous acetone at pH 3 and an indicator [232] or by titration with Septonex (carbethoxypentadecyltrimethylammonium bromide) and neutral red as indicator at pH 8.2-8.4 and 540 nm [233]. In a modified two-phase back-titration method, the anionic surfactant solution is treated with hyamine solution, methylene blue, and chloroform and then titrated with standard sodium dodecyl sulfate. The chloroform passing through a porous PTFE membrane is circulated through a spectrometer and the surfactant is analyzed by determining the absorbance at 655 nm [234]. The use of a stirred titration vessel combined with spectrophotometric measurement has also been suggested [235]. Alternative endpoint detections are based on physical methods, such as stalag-mometry [236] and nonfaradaic potentiometry [237]. 

Gravimetric and volumetric methods are practicable for the quantitative determination of the a-sulfo fatty acid esters. Using gravimetric methods the surfactant is precipitated with p-toluidine or barium chloride [105]. The volumetric determination method is two-phase titration. In this technique different titrants and indicators are used. For the analysis of a-sulfo fatty acid esters the quaternary ammonium surfactant hyamine 1622 (p,f-octylphenoxyethyldimethyl-ammonium chloride) is used as the titrant [106]. The indicator depends on the pH value of the titration solution. Titration with a phenol red indicator is carried out at a pH of 9, methylene blue is used in acid medium [106], and a mixed indicator of a cationic (dimidium bromide) and an anionic (disulfine blue VN150) dye can be used in an acid and basic medium [105]. 

Another titration method makes use of benzalkonium chloride. A solution of an anionic surfactant ( — 0.1 meq) is put into a beaker, and 20 ml of a methylene blue solution (—0.25% in water) and chloroform is added. Titration is performed against a 0.004 M solution of benzalkonium chloride under vigorous stirring. When both water and chloroform phase show the same (blue) color, the endpoint of the titration is reached. 

The standard procedure for the synthesis of leuco dyes related to benzoyl leuco Methylene Blue is straightforward. The one-pot synthesis is carried out in a two-phase water-toluene system. Methylene Blue is first dissolved in the aqueous phase and reduced with sodium dithionite under nitrogen and with stirring. The yellowish leuco is extracted into the organic phase where it is allowed to react with an acid chloride, the aqueous phase being made alkaline. 

Leuco Methylene Blue, Basic Blue 3, or phenazine dyes are capped with a dye bearing acid chloride or chlorocarbonyl functionality. Normal procedures employed for the synthesis of benzoyl leuco Methylene Blue can be utilized except that a dye chloroformate (69) replaces the benzoyl chloride. 

The methods most commonly used to detect hydrogen sulfide in environmental samples include GC/FPD, gas chromatography with electrochemical detection (GC/ECD), iodometric methods, the methylene blue colorimetric or spectrophotometric method, the spot method using paper or tiles impregnated with lead acetate or mercuric chloride, ion chromatography with conductivity, and potentiometric titration with a sulfide ion-selective electrode. Details of commonly used analytical methods for several types of environmental samples are presented in Table 6-2. 

Wrobel et al. [29] described a simple method for the determination miconazole in pharmaceutical creams, based on extraction and second-derivative spectrophotometry. In the presence of sodium lauryl sulfate (0.5%) and sulfuric acid (0.4 mol/L), the miconazole and internal standard (methylene blue) were extracted to 100 pL of methylene chloride. The organic phase was evaporated in the nitrogen stream and the dry residue was dissolved in methanol (1.5 mL). The analytical signal was obtained as the ratio between second-derivative absorbances measured at 236.9 nm... 

Methylene blue, 9 517-518 Methylene bromide, 4 348 Methylenecarbenes, 21 144, 146 Methylene chloride, 16 371-380 analytical methods for, 16 376 binary azeotropes of, 16 373t chlorocarbon/chlorohydrocarbon of industrial importance, 6 227t consumption, 6 244t dry, 16 372... 

DEQ DM DTD MAC EO FADA LAB LAS M MBAS MCPEG Lever s diester quat dialkyldimethyl ammonium ditallow dimethylammonium chloride ethylene oxide fatty acid diethanolamide linear alkylbenzene linear alkylbenzene sulfonate R3S1O0.5 methylene blue active substances mono carboxylated PEG... 

Experiments—Pass hydrogen sulphide slowly into the most concentrated aqueous solution of Bindschedler s green obtainable, until after some time the colour has changed to yellowish-red. Now add dilute hydrochloric acid and the solution of 0-3 g. of sodium dichromate. Precipitate the methylene blue formed by adding zinc chloride solution. 

Elemental composition Na 58.93%, S 41.07%. An aqueous solution is analyzed to determine sodium content. Also, an aqueous solution may be analyzed for sulfide by methylene blue colorimetric test or by iodometric titration (APHA, AWWA, and WEF. 1999. Standard methods for the Examination of Water and Wastewater, 20 ed. Washington, DC American Pubhc Health Association). The methylene blue test is based on reacting sulfide, ferric chloride and dimethyl-p-phenylenediamine to produce methylene blue. Also, sulfide can be measured by using a sdver-sdver sulfide electrode. Quahtatively, sulfide may be identified from the hberation of H2S on treatment with acid. The H2S turns the color of paper soaked with lead acetate black (See Hydrogen Sulfide). 

Pour 50 ml of an aluminium chloride solution into a 100-ml beaker and precipitate aluminium hydroxide by adding an ammonia solution with stirring. How can the completeness of precipitation be determined Filter off the aluminium hydroxide on a funnel with a filtering bottom and without removing the hydroxide from the filter, pass a solution of methylene blue through it. How can the vanishing of the colour of the solution be explained ... 

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