Ammonium hydrosulfide

Sohd ammonium sulfide decomposes to ammonia and ammonium hydrosulfide at about — 18°C consequently it is normally marketed as a 40—44% aqueous solution. In June 1991 the price was 507 per metric ton. 

Ammonium Hydrosulfide. The reaction of equimolar amounts of ammonia and hydrogen sulfide results in the formation of ammonium hydrosulfide [12124-99-1/, NH HS, which is also produced by the loss of ammonium from ammonium sulfide. The hydrosulfide is very soluble in water,... 

Ammonium-ferrisulfat, n. ammonium iron(III). sulfate, ferric ammonium sulfate, -ferro-sulfat, n. ammonium iron(II) sulfate, ferrous ammonium sulfate, -jodat, n. ammonium iodate. -jodid, n. ammonium iodide, -platinchlorid, n. ammonium platinichloride (chloroplatinate). -rest, m. ammonium radical. rhodanid, -rhodantir, n. ammonium thiocyanate, -salpeter, m. ammonium nitrate, -salz, n. ammonium s t. -selfe,/. ammonia soap, -sulfhydrat, n. ammonium hydrosulfide, -sulfocyanid, n. ammonium thiocyanate, -verbindung,/. ammonium compound, -zinn-chlorid, n. ammonium chlorostannate, pink salt. 

It was found later57 that thioamidation of PAN proceeds readily and practically without any side reaction even at 0—5 °C when ammonium hydrosulfide is used as the reagent for the thioamidation. 

In the original process the cellulose nitrate itself was used as the fiber (hence its satirical description as mother-in-law silk ). The regenerating agent is ammonium hydrosulfide. The basic process was first demonstrated by J. W. Swan in London in 1885 but commercialized by Count L. M. H. B. de Chardonnet ( Father of the rayon industry ) in France in 1891 and operated there until 1934. The last working factory, that in Brazil, was burnt down in 1949. The other processes for making rayon fibers by regenerating cellulose ( viscose, cupram-monium) gave superior products. See also Rayon. 

Ammonium halides, 2 714-715 vapor pressure, 2 715t Ammonium hydrosulfide, 2 728 Ammonium hydroxide, for fermentation, 11 38... 

Onda found a standard deviation of 0.052J./mol for his complete set of data, including multicharged ions. These correlations thus provide a coefficient for gases in ammonium bicarbonate that may be in error by more than 0.05 Jl/mol Onda s coefficients for gases in ammonium hydrosulfide are of unknown origin and accuracy, and coefficients for ammonium carbamate are not provided. In short, this type of correlation does not provide the needed information. 

Thus, averages from the two correlations yield tentative values of 0.036, —0.022, and 0.033 kg H20/mol for the salting out of ammonia by ammonium bicarbonate, hydrosulfide, and carbamate solutions, respectively, at 25 C. However, for ammonia in ammonium hydrosulfide we prefer to use a value from our correlation of the ternary data of Miles and Wilson(45,46), as discussed later. 

To apply the correlation of Figure 10 for prediction of the salting out of carbon dioxide by ammonium hydrosulfide and bicarbonate solutions we need to correct for the differences of their partial molar volumes from that of sodium chloride. Partial molar volumes were obtained from Ellis and McFadden(53). Volume change of the hydrosulfide and bicarbonate are equal within 0.2 cm3/mol at temperatures up to 100 C and differ very little at still higher temperatures thus, we assume that the changes with temperature of the salting-out coefficients of the two salts are equal up to... 

We believe that the most accurate salting-out coefficient for ammonia in ammonium hydrosulfide solution is the value,... 

Ammonium sulfide decomposes to ammonia and ammonium hydrosulfide ... 

Orange-yeUow or reddish amorphous powder density 4.12 g/cm decomposes at 75°C insoluble in water and alcohol soluble in hydrochloric acid, caustic alkalies and ammonium hydrosulfide. 

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. 

Ammonium Formate Ammonium Hydrosulfide Ammonium Molybdate Ammonium Nitrate Ammonium Phosphate, Dibasic Ammonium Phosphate, Monobasic. .. Barium Hydroxide Ammonium Phosphate, Monobasic Ammonium Sulfate Ammonium Sulfide Ammonium Thiocyanate Ammonium Thiosulfate Antimony... 

Gugot Mixture—same as above, but replacing the chloro-sulfuric acid with the bromo-sulfuric Sophronius Mixture consisted of 3 parts of concentrated H2S04 and 2 parts of KMn04 In addition to these mixtures, it was proposed to use phosphorous trichloride, which catches fire on contact with either ammonia or ammonium hydrosulfide, NH4 HS... 

In one synthesis of this drug, L-proline (11-2) is acylated with the acid chloride (11-1) obtained from the addition of hydrogen chloride to the double bond in methacrylic acid followed by reaction with thionyl chloride to give amide (11-3) as a mixture of diastereomers. The pure 2S isomer is then isolated from the mixture by fractionation as the dicyclohexylamine salt. Treatment of that compound with ammonium hydrosulfide leads to the displacement of chlorine by a thiol group and the formation of captopril (11-4) [13]. 

Furfuryl mercaptan cannot be prepared according to the classical method using furfuryl chloride and potassium sulfide.2 It has been prepared by reduction of 2-furfuryl disulfide, obtained from furfural and ammonium hydrosulfide.3 The mercaptan has also been obtained in 33% yield 2 by the reaction of furfuryl chloride with thiourea and subsequent decomposition of the intermediate S-2-furfurylisothiourea according to the general method described in Organic Syntheses.4 In the present method, which has been published previously, the use of the very unstable and difficultly available furfuryl halides is avoided.6... 

The valuable synthetic intermediates are benzo-2,l,3-selenadiazoles. They were used for preparation of. V-al ky I-1,2-benzenediamines, 3-nitro-1,2-benzenediamines, 3,4-diamino-2-nitrophenols, and 5-nitroqunoxalines. The key step of the reaction is their reductive deselenation with hydrogen iodide or, better, with ammonium hydrosulfide [233-238],... 

Reductive dimerization has also been reported isatide (160a) and sulfisatide (160b) were prepared by treatment of isatin with ammonium hydrosulfide under different conditions, the structures were assigned by Bergmann.221 Yoshida et cd.22Z recently reported formation of the dimer... 

SYNS AMMONIUM BISULFIDE AMMONIUM HYDROGEN SULFIDE AMMONIUM HYDROSULFIDE, solution (DOT) AMMONIUM MERCAPTAN AMMONIUM SULFHYDRATE MONOAMMONIUM SULFIDE SIRNIKAMONNY TRUE AMMONIUM SULFIDE... 

SAFETY PROFILE Poison by ingestion. Moderately toxic by skin contact. See also AMMONIUM HYDROSULFIDE. When heated to decomposition it emits very toxic fumes of NOx, SOx, and H2S. 

Solid ammonium hydrosulfide (NH4HS) decomposes entirely to gases when it is heated. Write a chemical equation representing this change. 

Ammonium Bromide Ammonium Bisulfide Ammonium Hydrosulfide Ammonium Fluoride Ammonium Chloride Sal Ammoniac Santoprene 101-55 Santoprene 101-64 Santoprene 101-73 Santoprene 201-55 Santoprene 203-50 Calcium Hydrosulfide Ammonium Sulfide Potash Potassium Stannate Cumaldehyde Diphenylamine Amyl Cinnamaldehyde Phenoxyacetic Acid Diethylhexyl Sebacate (2-) Bis(2-Ethylhexyl) Sebacate Dioctyl Sebacate Phenyl Acetate Phenoxyethanol (2-) Ethylene Glycol Phenyl Ether Arcel... 

Nucleophilic substitution by salts of H2S will react with halogenated compounds to make mercaptides that can be acidified to mereaptans. The most convenient salts are sodium and ammonium hydrosulfides. Mercaptoacetic acid is made by the reaction of ammonium hydrosulfide with monochloroacetic acid followed by acidification. 

The planet s atmosphere is generally similar to that of the other outer planets. The three most abundant chemical species are molecular hydrogen (84 percent), helium (14 percent), and methane (2 percent). Minor constituents of the atmosphere that have been identified include hydrogen deuteride (about 192 ppm) and ethane (about 1.5 ppm). These species appear to exist in the form of water ice, ammonia ice, ammonium hydrosulfide ice, and, possibly, methane ice. As with Uranus, Neptune s bluish color is a result of the absorption of red light from solar radiation by methane molecules. 

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