Sodium hydrogen sulfide hydrosulfide

SYNS SODIUM BISULFIDE SODIUM HYDROGEN SULFIDE SODIUM HYDROSULFIDE, solution (NA 2922) pOT) SODIUM HYDROSULFIDE, with <25% water of crj stallization pN 2318) pOT) SODIUM HYDROSULFIDE, with not <25% water of crt stallization pN 2949) pOT) SODIUM MERCAPTAN SODIUM MERCAPTIDE SODIUM SULFHYDRATE... 

Sodium Hydrosulfide Solution Sodium Bisulfide Sodium Hydrogen Sulfide Sodium Sulfhydrate ... 

SODIUM HYDROGEN SULFIDE (16721-80-5) Combustible solid (flash point, 45% solution 73°F/23°C). Hydrolyzes in moist air to sodium hydroxide and sodium sulfide. Reacts violently with moisture, producing heat, sodium hydrosulfide solution, and hydrogen sulfide fumes spontaneously combustible. Reacts with acids, acid fumes, forming hydrogen sulfide. Incompatible with acids, amides, organic anhydrides, isocyanates, alkylene oxides, epichlorohydrin, aldehydes, alcohols, glycols, phenols, cresols, caprolactam solution, oxidizers. Corrodes most metals in the presence of moisture. 

Synonyms Sodium hydrogen sulfide Sodium hydrosulfide Sodium hydrosulfide, solid Sodium hydrosulfide, sol n. Sodium mercaptan... 

Silver Sulfate Silver Sulfate Sodium Hydrogen Sulfide Sodium Hydrosulfide... 

Sodium Hydrosulfide Solution — (i) Chemical Designations — Synonym Sodium bisulfide Sodium hydrogen sulfide Sodium sulfhydrate Chemical Formula To be developed (ii) Observable Characteristics — Physical State (as normally shipped) Liquid Color Light lemon pale yellow amber to dark red Odor Rotten eggs (iii) Physical and Chemical Properties — Physical State at 15 °C and I flfm. Liquid Molecular Weight Not pertinent BoiUng... 

The compound can be prepared from 2,4,6-trinitrophenol (picric acid [88-89-1]) by reduction with sodium hydrosulfide (163), with ammonia —hydrogen sulfide followed by acetic acid neutralization of the ammonium salt (164), with ethanolic hydrazine and copper (165), or electrolyticaHy with vanadium sulfate in alcoholic sulfuric acid (159). Heating 4,6-dinitro-2-benzamidophenol in concentrated HQ. at 140°C also yields picramic acid (166). 

Strontium carbonate also precipitates from strontium sulfide solution with carbon dioxide. Hydrogen sulfide is generated as a by-product of this reaction and reacts with sodium hydroxide to produce sodium hydrosulfide, which is sold as by-product. The abiUty of the black ash process to produce a product exceeding 95% strontium carbonate, from ores containing <85% strontium sulfate, has led to its predorninance. 

Anhydrous gaseous or Hquid hydrogen sulfide is practically nonacidic, but aqueous solutions are weakly acid. The for the first hydrogen is 9.1 X 10 at 18°C for the second, is 1.2 x 10 . Reaction of hydrogen sulfide with one molar equivalent of sodium hydroxide gives sodium hydrosulfide with two molar equivalents of sodium hydroxide, sodium sulfide forms. Hydrogen sulfide reacts with sodium carbonate to produce sodium hydrosulfide... 

Manufacture. Small cylinders of hydrogen sulfide are readily available for laboratory purposes, but the gas can also be easily synthesized by action of dilute sulfuric or hydrochloric acid on iron sulfide, calcium sulfide [20548-54-3], zinc sulfide [1314-98-3], or sodium hydrosulfide [16721 -80-5]. The reaction usually is mn in a Kipp generator, which regulates the addition of the acid to maintain a steady hydrogen sulfide pressure. Small laboratory quantities of hydrogen sulfide can be easily formed by heating at 280—320°C a mixture of sulfur and a hydrogen-rich, nonvolatile aUphatic substance, eg, paraffin. Gas evolution proceeds more smoothly if asbestos or diatomaceous earth is also present. 

Hydrogen sulfide has been produced in commercial quantities by the direct combination of the elements. The reaction of hydrogen and sulfur vapor proceeds at ca 500°C in the presence of a catalyst, eg, bauxite, an aluminosihcate, or cobalt molybdate. This process yields hydrogen sulfide that is of good purity and is suitable for preparation of sodium sulfide and sodium hydrosulfide (see Sodium compounds). Most hydrogen sulfide used commercially is either a by-product or is obtained from sour natural gas. 

Inhibition of monoamine oxidase has been proposed as a possible mechanism underlying the hydrogen sulfide-mediated disruption of neurotransmission in brain stem nuclei controlling respiration (Warenycia et al. 1989a). Administration of sodium hydrosulfide, an alkali salt of hydrogen sulfide, has been shown to increase brain catecholamine and serotonin levels in rats. It has also been suggested that persulfide formation resulting from sulfide interaction with tissue cystine and cystinyl peptides may underlie some... 

Lopez A, Prior MG, Reiffenstein RJ, et al. 1989. Peracute toxic effects of inhaled hydrogen sulfide and injected sodium hydrosulfide on the lungs of rats. Fundam Appl Toxicol 12 367-373. 

Treatment of nitriles with gaseous hydrogen sulfide in the presence of anion exchange resin (Dowex 1X8, SH from) at room temperature affords the corresponding primary thioamides.27 Treatment of nitriles with 70% sodium hydrosulfide hydrate and magnesium chloride hexahydrate in DMF or methanol affords primary thioamides in high yields.28 Primary thioamides have been... 

A truck driver arrived at the facility to deliver a load of sodium hydrosulfide solution. The delivery took place on the night shift. During prior deliveries on this shift, the shift supervisor had received only pickle acid. (The material commonly known onsite as pickle acid was actually ferrous sulfate.) He assumed that the sodium hydrosulfide was pickle acid and directed the truck driver to unload at the facility s pickle acid tank. Hydrogen sulfide gas was produced when the sodium hydrosulfide solution was unloaded into the ferrous sulfate tank. The truck driver was exposed to the gas and died one Whitehall Leather employee was injured (NTSB, 2000). 

Similar reducing effects are obtained from alkali sulfides, hydrosulfides and polysulfides [241]. A peculiar reaction believed to be due to sodium polysulfide formed in situ by refluxing sulfur in aqueous-ethanolic sodium hydroxide is a conversion of p-nitrotoluene to p-aminobenzaldehyde [242]. Oxidation of the methyl group by the polysulfide generates hydrogen sulfide which then reduces the nitro group to the amino group. 

Thioformaldehyde is unknown in the free state, but polymers of it have been obtained by ring opening of trithiane, by removal of hydrogen sulfide from methanedithiol, by reaction of formaldehyde and hydrogen sulfide or sodium sulfide, and by reaction of sodium hydrosulfide with methylene chloride. The... 

Poly(thioformaldehyde) ran be made from materials other than formaldehyde and hydrogen sulfide. The reaction of alkaline sulfides or hydrosulfides with methylene chloride is an interesting rase. Schmidt and Blaettner (16) were the first to examine this reaction, but they did not characterize the product. Later, Russo et al. (17), found that poly(thioformaldehyde) can be made from sodium hydrosulfide and methylene chloride in yields of over 90%... 

The method described is adapted from the procedures of Kym 3 and Engelhardt, Latschinoff, and Malyscheff.4 Thio-benzoic acid has been prepared by the reaction of benzoyl chloride with potassium sulfide,4 hydrogen sulfide in pyridine,6 6 and magnesium bromide hydrosulfide.7 It is formed from dibenzoyl disulfide with potassium hydrosulfide,4 potassium hydroxide,4 8 and ammonia.9 It is also formed from dibenzoyl sulfide, from phenyl benzoate, and from benzoic anhydride with alcoholic potassium hydrosulfide.4 It has been obtained from dibenzoyl sulfide and hydrogen sulfide,10 carbon oxysulfide and phenyl-magnesium bromide,11 12 dibenzyl disulfide and sodium ethoxide,13 benzyl chloride and sulfur in the presence of potassium hydroxide,14 and benzylthiosulfuric acid and alkali.18 16... 

Sodium polysulfide and sodium hydrosulfide are other agents that are used. They do not produce excess sludge, but can generate highly toxic hydrogen sulfide gas. Good ventilation and pH control are needed in any system employing these chemicals. 

PHENOLATE PROCESS. A process for removing hydrogen sulfide from gas by the use of sodium phenolate. which reacts with the hydrogen sulfide to give sodium hydrosulfide and phenol. This can be reversed by steam heat to regenerate the sodium phenolate. 

SEABOARD PROCESS. Method of removing hydrogen sulfide from a gas by adsorption in sodium carbonate solution. Sodium bicarbonate and sodium hydrosulfide are formed. Blowing air through the solution, hydrogen sulfide is released and carried off, and the sodium carbonate is regenerated. 

An alcoholic solution of sodium hydrosulfide is prepared by dissolving 4.6 g. of sodium (0.2 mole) in 150 cc. of absolute alcohol and saturating the solution with dry hydrogen sulfide. 

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