Alcohol ammonium

The 2,5-dialkoxy-2,5-dihydrofurans can be obtained by electrolytic oxidation of furan in alcoholic ammonium bromide or by bromine oxidation of furan in the appropriate alcohol. ... 

An interesting approach to quinindoline (227) is due to Gabriel and Eschenbach who found that reductive ring closure of a,jS-bis-o-nitrophenylpropionic acid with ferrous sulfate and ammonia or of its nitrile (226) with alcoholic ammonium sulfide in a sealed tube at 100°... 

In a similar manner, 2,4,6-trisubstituted 3-pyridinecarboxylic acid esters have been prepared using a mixture of a, 3-ketoesters, propargylic alcohols, ammonium acetate and Mn02. The reaction proceeds by oxidation of the propargylic alcohol to the corresponding ketone, which reacts with the enamine being formed from the like loos lor and ammonium acetate. For this domino process, normal heating at 70 °C was used. 

Some separation techniques rely on the physical removal of one of the fractions charcoal will strongly adsorb the free fraction allowing its ready removal by centrifugation the addition of dextran reduces the tendency of charcoal to strip bound antigen from the complex alternatively, the bound fraction may be precipitated by the addition of suitable concentrations of various protein precipitants such as alcohol, ammonium sulphate and polyethylene glycol (PEG). 

Natural stibnite is black orthorhombic crystal or grayish-black powder the compound also exists as an amorphous substance in yeUow-red modification distorted octahedral arrangement density 4.64 g/cm for the natural stibnite and 4.12 g/cm for the red modification melts at 550°C vaporizes around 1150°C insoluble in water (1.75mg/L at 18°C) and acetic acid soluble in hydrochloric acid and caustic soda solution also, soluble in alcohol, ammonium hydrosulfide and potassium sulfide. 

Nitrobenzo[6]thiophene may be prepared by reaction of the 3,4-dinitro compound with alcoholic ammonium sulfide422-538 other workers have claimed that this method yields only traces of the desired product.84 It may also be prepared by deamination of 5-amino-4-nitrobenzo[6]thiophene,162,422 or by decomposition of 4-benzo[6]-thiophene diazonium cobaltinitrite with aqueous sodium nitrite in the presence of cuprous oxide and cupric sulfate.84 7-Nitrobenzo[6]-thiophene may be obtained by the latter method (15% yield) from the corresponding amine.84... 

Keywords alcohol, ammonium chlorochromate, montmorillonite K-10, ketone... 

The best listing of fungicides that we know of is published annually by the Meister Publishing Company of Willoughby, Ohio in their Farm Chemicals Handbook. They list the following compounds or types of compounds as officially "registered" for use on plants in the United States allyl alcohol, ammonium isobutyrate, antibiotics, benzimidazole types, carbofuran, cadmiums, captan types, coppers, carboxin, dehydroacetic acid, Dexon (sodium [4-(dime thy lamino) phenyl diazo sulfonate), diphenyl,... 

The precipitate is slightly soluble in water (3-26 g " , Ks = 3 x 10-4), but quite insoluble in 50 per cent ethanol. Precipitation is accelerated by vigorous agitation of the solution, by scratching the sides of the vessel with a glass rod, and by adding alcohol. Ammonium salts yield a similar precipitate and must be absent. 

For binder preparation, dilute hydrochloric or acetic acids are preferred, because these faciUtate formation of stable silanol condensation products. When more complete condensation or gelation is preferred, a wider range of catalysts, including moderately basic ones, is employed. These materials, which are often called hardeners or accelerators, include aqueous ammonia, ammonium carbonate, triethanolamine, calcium hydroxide, magnesium oxide, dicyclohexylamine, alcoholic ammonium acetate, and tributjitin oxide (11,12). 

The reactions of all six isomeric trinitrotoluenes with alcoholic ammonium sulphide are known. Aside from the compounds formed, the color of the solutions are different in each case, and form a very good method of determining which trinitrotoluene is present. 

Precipitation techniques can be categorized into two general classes, non-specific and specific. The nonspecific separations involve the addition of a salt or solvent that decreases the solubility of the antigen-antibody complex under conditions that do not affect the free-labeled antigen. After addition, the immune complexes can be precipitated by centrifugation and the radioactivity in either the supernatant solution or the precipitate can be measured. Examples of precipitation reagents used in immunoassays include alcohol, ammonium sulfate, polyethylene, and dioxane. Care must be taken to avoid coprecipitation of the unbound label. 

Developers A=2% formic acid B = 20% potassium chloride C = isopropyl alcohol-ammonium hydroxide-water (8 1 1) D = Source-. Ref. [12]. 

Properties Gray, crystalline powder. D 4.42, mp (explodes). Soluble in alcohol, ammonium hydroxide, and hot water slightly soluble in cold water. 

Properties White, crystalline powder becomes violet on exposure to light. D 7.004 (30/4C), mp 430C, bp 720C. Slightly soluble in water insoluble in alcohol, ammonium hydroxide. 

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