Potassium permanganate silica

Potassium hydroxide Potassium iodide Potassium nitrate Potassium permanganate Silica, sand Silver, tarnished Silver chloride Sodium... 

Aluminum sulfate Bauxite Bentonite Bone black Magnesium trisilicate Potassium permanganate Silica Tricaprylyl methyl ammonium chloride decolorizer, food processing Carbon, activated decolorizer, glass... 

Photolysis of J gives an isomeric compound K in 83% yield. Alkaline hydrolysis of K affords a hydroxy carboxylic acid L, C25H32O4. Treatment of K with silica gel in hexane yields M, C24H2g02. M is converted by sodium periodate-potassium permanganate to a mixture of N and O. What are the structures of K, L, and M ... 

Thin layer chromatography was performed using silica plates and eluting with hexane. Potassium permanganate was used to visualize the spots. The R, values for products I and 3 were 0.38 and 0.37, respectively. 

Several TLC methods have been described for the identification of isoxsuprine [36]. In all systems, silica gel G, dipped in sodium hydroxide solution or methanol, was used as the stationary phase. Either 100 1.5 methanol strong ammonia, 75 15 10 cyclohexane toluene diethylamine, or 90 10 chloroform methanol was successfully used as the mobile phase. In all systems, the spray reagent used to develop the places was acidified potassium permanganate solution. 

The reaction may be followed by thin-layer chromatography. The ratio of the Rf values for cyclohexene and c/s-diol 2 is 2 1 (commercial silica gel plates, ethyl acetate). The plates are best visualized by first spraying with 1 % aqueous potassium permanganate, then with methanolic sulfuric acid, followed by charring with heat. The checkers found that, if the procedure is followed exactly, monitoring the reaction by thin-layer chromatography is unnecessary. 

Detection.—Apart from naturally occurring ores of vanadium, vanadium steels, and ferrovanadium, the commonest compounds of vanadium are those which contain the element in the pentavalent state, viz. the pentoxide and the various vanadates. The analytical reactions usually employed are, therefore, those which apply to vanadates. Most vanadium ores can be prepared for the application of these reactions by digesting with mineral acids or by alkaline fusion with the addition of an oxidising agent. When the silica content is high, preliminary treatment with hydrofluoric acid is recommended. Vanadium steels and bronzes, and ferrovanadium, are decomposed by the methods used for other steels the drillings are, for instance, dissolved in sulphuric acid and any insoluble carbides then taken up in nitric acid, or they are filtered off and submitted to an alkaline fusion. Compounds of lower valency are readily converted into vanadates by oxidation with bromine water, sodium peroxide, or potassium permanganate. 

Bulk TLC Silica (spray 0.1 M methanolic potassium hydroxide) Ammonium hydroxide-methanol (1.5 100) Aidified potassium permanganate GC [2] HPLC [3] [1]... 

Bulk Ethionamide TLC Dissolve in acetone Silica Methanol-chloroform-acetic acid (15 8 1) Potassium permanganate Impurities TLC, GC, HPLC [1,2,8,9] [24]... 

Three TLC systems have been described for the identification of spironolactone [36], all of which are based on the use of silica gel G as the adsorbent. Location of eluted sport was effected using either acidified iodoplatinate, or acidified potassium permanganate ... 

Assay Dissolve about 3 g of sample, previously dried over silica gel for 4 h and accurately weighed, in water to make 100 mL. Pipet 10 mL of this solution into a mixture of 100.0 mL of 0.1 N potassium permanganate, 50 mL of water, and 5 mL of sulfuric acid, keeping the tip of the pipet well below the surface of the liquid. Warm the solution to 40°, allow it to stand for 5 min, and add 25.0 mL of 0.1 N oxalic acid. Heat the mixture to about 80°, and titrate with 0.1 N potassium permanganate. Each milliliter of 0.1 N potassium permanganate is equivalent to 3.450 mg of NaN02. 

Bulk TLC Silica Chloroform-acetone (4 1) Acidified potassium permanganate Ml... 

Potassium permanganate adsorbed on either silica or alumina can also be used to cleave double bonds under mild conditions and in good yields. In one procedure the alkene, dissolved in benzene, is passed through a column packed with KMn04 on a silica gel support.The reaction occurs rapidly at room temperature and is equally effective for the cleavage of all types of double bonds, even some that are inert to other traditionid methods. ... 

Potassium permanganate impregnated on silica gel is the reagent of choice for the cleavage of ethylenic double bonds. The reaction requires only mild conditions, such as room temperature, for... 

Disubstituted-l,3,4-oxadiazoles (xx) were prepared by the oxidation of l-aroyl-2-arylidine hydrazines (xix) with potassium permanganate on the surface of silica gel as well as in mixtures of acetone and water under microwave irradiation [27]. 

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