Sulfide, ammonium, solution

LIBERATES HIGHLY TOXIC HYDROGEN SULFIDE ON CONTACT WITH ACID 

Commercial product is 16-20% ammonium sulfide in water. Colorless liquid becomes yellow on standing due to formation of polysulfide.1 

Contact with acid liberates highly toxic hydrogen sulfide.1,2 

Ammonium sulfide solution is toxic if swallowed or absorbed through the skin. The liquid is corrosive to the skin, eyes, and mucous membranes.2 Avoid inhalation of the vapor. 

Aqueous solutions of ammonium salts. Wear nitrile rubber gloves, laboratory coat, eye protection, and self-contained breathing apparatus. Cover the spill with a 1 1 1 mixture by weight of sodium carbonate, clay cat litter (calcium bentonite), and sand. When all of the liquid has been absorbed, scoop the mixture into a plastic pail and place in the fume hood. Add sufficient 1% aqueous sodium hydroxide solution to dissolve the sodium carbonate in the spill mix and to ensure that the liquid is basic. Estimate the volume of ammonium sulfide solution that was spilled and add 200 mL of household chlorine bleach containing 5.25% sodium hypochlorite for each 10 mL of commercial ammonium sulfide solution (commercial ammonium sulfide solution is about 20% this volume of bleach allows a 25% excess). Allow the mixture to stand in the fume hood overnight and decant the liquid into the drain. Dispose of the solid (sand and calcium bentonite) in normal refuse.3,4 

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This reaction can also be mn in a continuous fashion. In the initial reactor, agitation is needed until the carbon disulfide Hquid phase reacts fully. The solution can then be vented to a tower where ammonia and hydrogen sulfide are stripped countercurrendy by a flow of steam from boiling ammonium thiocyanate solution. Ammonium sulfide solution is made as a by-product. The stripped ammonium thiocyanate solution is normally boiled to a strength of 55—60 wt %, and much of it is sold at this concentration. The balance is concentrated and cooled to produce crystals, which are removed by centrifiigation. 

Though no naphthyridine rings are formed when copolymers of AN with vinylidene chloride (50 50) or with vinyl chloride (50 50) are treated with ammonium sulfide solutions, it is, however, probable that, as a result of a considerable number of intermolecular chemical bonds being formed in the macromolecules or copolymers, the heat resistance of these modified copolymers... 

The platinum asbestos is filtered off. The product which has deposited on the catalyst is washed off with a minimum amount of water and the washings are combined with the filtrate. To avoid contamination of the final product with zinc, the zinc is removed from the solution by addition of about 55 ml. of a 20% ammonium sulfide solution (or ammonium sulfide is added until precipitation is complete). The zinc sulfide is removed by filtration, the solid is washed, and the washings are added to the solution. Alcohol is added to the filtrate and washings until some cloudiness appears, then the mixture is cooled to precipitate the product. Additional product may be obtained by concentrating the solution under vacuum, adding hydrochloric acid to obtain a pH below 1, and cooling. The crystals are washed with alcohol. 

Ammonium sulfide Solution s s Chlorine dioxide Unknown 1 1... 

The uterus is removed, noting which is the left side, and weighed. Uteri that do not appear pregnant should be checked for implantation sites these are usually visible when viewed from the serous (outer) surface over a light source. Where no sites are observed, uteri of rodents should be stained by placing in ammonium sulfide solution, which stains the implantation sites although this technique is also suggested for rabbits, it is of questionable effectiveness (personal communication). 

The uterus of all females is placed in ammonium sulfide solution in order to stain any previously undetected implantation sites (15). 

Weighing the gravid uterus is not mandatory for all regulatory guidelines, but the information gained with respect to maternal body weight corrected for uterine weight provides a very useful aid to data interpretation. After removal of the fetuses and placentae, the uterus of all females is placed in ammonium sulfide solution in order to stain any previously undetected implantation sites (15). 

Ammonium Oxalate Ammonium Oxalate Hydrate Ammonium Pentaborate Ammonium Pentaborate Tetrahydrate Ammonium Pentachlorozincate Ammonium Perchlorate Ammonium Peroxydisulfate Ammonium Persulfate Ammonium Phosphate Ammonium Phosphate, Dibasic Ammonium Rhodanate Ammonium Rhodanide Ammonium Silicofluoride Ammonium Stearate Ammonium Sulfamate Ammonium Sulfate Ammonium Sulfhydrate Solution Ammonium Sulfide Ammonium Sulfide Solution Ammonium Sulfite Ammonium Sulfocyanate Ammonium Sulfocyanide Ammonium Tartrate Ammonium Thiocyanate Ammonium Thiosulfate Ammonium Zinc Chloride Amorphous Phosphorus AMS... 

Twenty-five milliliters of concentrated ammonia are saturated with hydrogen sulfide gas while cooling in ice. When no more gas is absorbed 25ml more of the ammonia water is added. The ammonium sulfide solution is warmed to about 35°C and then 25g of finely powdered roll sulfur are stirred in. When no more dissolves (Vfc-l hour), the yellow solution is filtered into 60ml of 95% alcohol and allowed to stand in a stoppered flask overnight in the refrigerator. The crystals are filtered by suction and washed with alcohol and ether. They are dried in vacuo over lime covered with a very small amount of solid ammonium chloride. 

All members are precipitated by H2S in the presence of ammonia and ammonium chloride, or ammonium sulfide solutions. 

Small Quantities. Wear nitrile rubber gloves, laboratory coat, and eye protection. Work in fume hood. For each 10 mL of commercial ammonium sulfide solution, add 100 mL of 1% aqueous sodium hydroxide solution and 200 mL of household bleach. Allow the solution to stand overnight, and then pour into the drain.3... 

Armour, M.A., J. Chem. Educ., 65, A64, 1988 Armour, M.A., Laboratory Disposal of Ammonium Sulfide Solutions, University of Alberta, Edmonton, 2001. 

Willgerodt reaction. In its original form this reaction involved heating an aryl alkyl ketone in a sealed tube at 210-230° with an aqueous solution of yellow ammonium polysulfide, prepared by dissolving sulfur in ammonium sulfide solution. The product is an aryl substituted aliphatic aciil amide, together with some of the corresponding carboxylic acid and often the hydrocarbon. An example is the... 

Pouring ammonium sulfide solution into a solution of cadmium nitrate gives a precipitate of cadmium sulfide. 

Ammonium Sulfide Solution, Red. Ammonium polysulfide soln. Contains about 8% NH and 22% sulfur, corresponding to about 30% (NH tjSj. 

Ammonium Sulfide Solution, Yellow. Ammonium bisulfide soln ammonium sulfhydrate soln ammonium hydrosulfide soln. Contains 8-9% NHj and about the same percentage of sulfur, corresponding to 16-20% as (NH,)jS. 

Other anionic species include the ions [Sn(N03)6]2" and also thiostannate, written SnS " but of uncertain structure, obtained by dissolving SnS2 in alkali or ammonium sulfide solution. The most extensive series are the oxalates [Mox3]2 (where M = Si, Ge or Sn) and other carboxylates.37... 

Iron sulfide, obtained by precipitation from a solution of an iron salt by ammonium sulfide solution, is heated dry with hydrogen sulfide at 10 atm and 430° for 3 h. In the case of cobalt sulfide obtained by precipitation the subsequent treatment with a stream of hydrogen sulfide is for 12 h at 200°. 

Acenaphthenyl methyl ketone (2 g) is heated with purified dioxan (8 g) and a solution of sulfur (1 g) in ammonium sulfide solution [10 g prepared by saturating ammonia solution 0/0.88) with hydrogen sulfide] in a sealed tube at 160° for 12 h. The crude 1-acenaphthene-acetamide produced is hydrolysed by 4 hours boiling with 15% sodium hydroxide solution (50 ml), giving a 57 % overall yield of the acid. 

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