Light brown color

This neutralization step should be performed for at least 20 min. During this period, the reaction turns from an indigo to a light brown color. 

A. Disodium Nitrosodisulfonate. In a 1-1. resin kettle, equipped with a mechanical stirrer, a thermometer, a gas-inlet tube suspended about 0.5 cm. above the bottom of the vessel, and an ice-cooling bath, are placed 15.0 g. (0.217 mole) of sodium nitrite (Note 1), 16.8 g. (0.200 mole) of sodium bicarbonate (Note 1), and 400 g. of ice. Sulfur dioxide (25.6 g. or 0.40 mole, Note 2) is passed into the cold, initially hetero-gcmcous mixture with stirring over a period of 40 minutes. Near the end of the sulfur dioxide addition, the light brown color of the reaction mixture fades almost completely. The resulting colorless to pale yellow solution of disodium hydroxyl-aminedisulfonato (Note 3), which has an approximate pH of 4,... 

The reaction of this LijP with Me2SiCl2 in a molar ratio of 1 2 progresses very slowly in DME. After 12 hours at 0°C the suspension of the reaction mixture still has a light brown color. It is only after a 4-hour heating at 84° C that this color slowly clears up. During the reaction, compound 10 (adamantane structure) is formed, as well as small quantities of by-products. There was no indication of the formation of P(SiMe2)3P. 

On addition of 1 equivalent of Fenl to a MeOH/H20 solution of the ditopic ligand 5, the solution takes a light brown color with formation of a rather intense band centered... 

The light brown color turns to red whereupon the temperature is permitted to rise to — 78 °C within 30 min. Excess boron trifluoride is permitted to evaporate and escape through the exit valve. The cap with the glass tube is removed and the Schlenk tube is stoppered. Residual boron trifluoride is removed in vacuo at — 60 °C for 1 h. The product is precipitated at — 60 °C with 80 mL of cold diethyl ether. The solvent is decanted and the red residue dried in vacuo at or below — 50 °C for 1 h. At this temperature, it is reprecipitated from dichloromethane (40 mL) with diethyl ether (80 mL) precooled to — 50 °C. After removal of the solvent as above, 3.5 g (71%) of the title compound is obtained. 

Place the beaker on the steam bath (maintained at ca 75° on the surface) and add, drop by drop, enough bromine to assure a slight excess over the amt necessary to convert all the DPhA to tetrabromdi phenyl amine (0.6ml of Br for each percent of DPhA in propint). A slight excess of Br is indicated by the persistence of a reddish light-brown color... 

Add 2 drops of the indicator solution to 100 cc. of distilled water. On the addition of 0.05 cc. of decinormal potassium carbonate, the light-brown color of the water should pass into pink on the further addition of 0.05 cc. of decinormal hydrochloric acid, the color should change to a golden yellow. 

This product has a light brown color and melts at 75-80°. After one recrystallization from petroleum ether the melting point is 80-81° (Note 7). 

The sulfuric acid layers are transferred directly into the 500-ml. short-stemmed separatory funnel to be used in the next step. The solution, which usually has a light brown color, should be cold and well mixed before the ring-closure operation. The ratio of acid to water is important, and only the amounts specified should be used. 

In a 6oo-cc. beaker 210 g. (0.87 mole) of ethyl bromomal-onate (p. 34) (Note 1) and 165 g. (0.89 mole) of potassium phthalimide (p. 8) are intimately stirred together. The mixture is stirred approximately every ten minutes. If no spontaneous reaction starts in half an hour (Note 1), it is necessary to initiate the reaction by heating to no-1200. The mixture then becomes liquid and can be stirred easily. It turns to a light brown color, especially near the top where it comes in contact with the air. When the temperature begins to drop, the mixture is heated in an oil bath at no0 for one hour to insure completion of the reaction. The mixture is then poured into a mortar where it solidifies to a solid mass (Note 2). When cold, the mixture is ground up with water and filtered to remove most of the potassium bromide. The precipitate is then reground with water and refiltered, finally washing the precipitate well with water. The solid material on the filter consists of some potassium bromide, some phthalimide, and the phthalimidomalonic ester. 

Figure 7. Interactions of Nation s side chains and a Pt nanoparticle. A light brown color indicates Pt atoms at distances closer than 6.79A° from an S atom. Atoms that are in regions around the sulfonic groups have been enlarged to improve visualization. Color codes are white and red for H and O in water, respectively, green for F, gray for C, and yellow for S 73 Reprinted from Electrochim Acta, Vol. 50, Balbuena et al., Molecular modeling studies of polymer electrolytes for power sources, p. 3788, Copyright (2005), with permission from Elsevier.

Sugar that is grown without herbicides, chemicals, and pesticides and isn t overly processed is better for you. Most of my recipes call for organic cane sugar, a versatile light brown-colored sugar that... 

To use, dilute 1 part of Solution A with 8 parts water. Prints should be washed thoroughly and then bleached in Solution A until the black image is converted to a very light brown color, about 1 minute. Prints should then be washed for 10 to 15 minutes and redeveloped. 

The platinized platinum electrodes were prepared by electrolyzing a solution of chloroplatinic acid containing no lead acetate (23). The metal deposition was stopped as soon as a light brown color appeared on the platinum wire. They were then immersed in IN H2S04 and electrolyzed again their polarity was alternated every 2 minutes for 20 minutes. The platinum electrodes were washed thoroughly with distilled water and soaked in conductivity water for one week before they were used. 

The reduction of AmV04 with hydrogen at 1200°C. results in light brown-colored AmVOs which, like all vanadates (III) of the rare earths crystallizes in an orthorhombic-deformed perovskite lattice. 

A. p-Toluenesulfonyl azide. - A solution of 71.5 g. (1.10 moles) of sodium azide (Note 1) in 200 ml. of water is placed in a 2-1. Erlenmeyer flask and diluted with 400 ml. of 90% aqueous ethanol (Note 2). To this solution is added with stirring a warm (45°) solution of 190.5 g. (1.00 mole) of / -toluenesulfonyl chloride (Note 3) in 1 1. of 99% ethanol (Note 2). During this addition, sodium chloride separates, and the reaction mixture takes on a light brown color. After the reaction mixture has been stirred at room temperature for 2.5 hours, most of the solvent is removed at 35° (15 mm.) with a rotary evaporator (Note 4). The residue is mixed with 1.2 1. of water in a separatory funnel, and the oily -toluenesulfonyl azide is separated. This oil is washed with two 100-ml. portions of water and dried over anhydrous sodium sulfate. Filtration with suction gives 160-170 g. (81-86%, based... 

The direct fire dryer consists of a bamboo grill platform where the split nuts are placed. Underneath is a fire hearth where coconut shells and husks are burned to provide heat for the vaporization of water from the kernels. The kernels shrink and are separated from the shells for further drying. Smoke from the burning fuel imparts a light brown color on the copra and its oil. 

Refined peanut oil is obtained from the seeds of Arachis hypogaea Linne (Fam. Leguminosae). The seeds are separated from the peanut shells and are expressed in a powerful hydraulic press. The crude oil has a light yellow to light brown color, and is then purified to make it suitable for food or pharmaceutical purposes. A suitable antioxidant may be added. 

The stabilized sludge will have a pH of 2.5. 5 and chlorine residual of 200 00 mg/L. The stabilized sludge will have chlorine smell and light brown color. Total solids, suspended solids, and volatile solids concentrations will be about the same as the raw sludge. When stored for 48 h, the chlorine residual will have fallen to 0 and the pH will have increased to 4.5-6.0. The organics will normally not decompose even after several days of storage. 

Properties Pure product is crystalline light-brown color. Mp 131C, d 1.24. Commercial grade is 50% aqueous solution. Insoluble in organic solvents. 

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