Acids hydrogen sulfide

In most respects, copper-nickel and copper-tin alloys behave similarly to copper-zinc alloys. The presence of acids, hydrogen sulfide, ammonia, and carbon dioxide degrades corrosion resistance. 

The technology is primarily applicable to the removal of inorganic fumes, vapors, and gases (e.g., chromic acid, hydrogen sulfide, ammonia, chlorides, fluorides, and SOj) volatile organic compounds (VOC) and particulate matter (PM), including PM less than or equal to 10 micrometers ( m) in aerodynamic diameter (PM,q), PM less than or equal to 2.5 m in aerodynamic diameter (PMj 5), and hazardous air pollutants (HAP) in particulate form (PM ap)-... 

Acetic acid, acetone, alcohol, aniline, chromic acid, hydrocynanic acid, hydrogen sulfide, flammable liquids, flammable gases, and mtratable substances, paper, cardboard and rags. 

Hydro-thionsaure, /. hydrosulfuric acid, hydrogen sulfide. -verbindung, /. hydro eompound (eompound formed by the addition of hydrogen). 

A number of small molecules that are acids do not fall into the categories mentioned above. These acids have no clear patterns in their structures, so it is best simply to learn their names and stmctures. Three hydrogen halides, HCl, HBr, and HI, are strong acids, but the fourth, HF, is a weak acid. Hydrogen sulfide, H2S, and hydrocyanic... 

Group IIIA metals, however, like aluminum, will not precipitate in an acidic hydrogen sulfide solution. They will precipitate, however, if a basic hydrogen sulfide solution is introduced. Group LA metals, on the other hand, are always soluble in a hydrogen sulfide solution, regardless of whether the solution is acidic or... 

Hydrogen sulfide has a variety of industrial uses. Its major use is in the production of elemental sulfur and sulfuric acid. Hydrogen sulfide is also used in the manufacture of sodium sulfide and thiophenes. It is used in metallurgy and in the production of heavy water for the nuclear industry (Beauchamp et al. 1984 HSDB 1998). In the past, hydrogen sulfide was used as an agricultural disinfectant. 

Kryukov, P.A. Starostina, L.I. Tarasenko, S.Ya Pavlyuk, L.A. Smolyakok, B.S. Larionov, E.G. "Ionization Constants of Carbonic Acid, Hydrogen Sulfide, boric Acid, and Sulfuric Acid at High Temperatures," Mezhdunar. Geokhim., Koagr. (Dokl.) 1st, 1971, 186-98 C.A, 1974, 84 (69193). 

When added to dilute mineral acids, hydrogen sulfide is generated. Analysis... 

In 1814 Jean-Jacques Colin and Henri-Frangois Gaultier de Claubry, professor of toxicology at the School of Pharmacy in Paris, described the blue substance produced when free iodine acts on starch, and studied the effects of temperature and of sulfurous acid, hydrogen sulfide, and other reagents on this reaction (131). In the same year Friedrich Stromeyer first applied this starch reaction to analytical chemistry and was able to detect as little as one part of iodine in 350,000 to 450,000 parts... 

Reactivity. Flammable polymerizes violently in the presence of trace amounts of metals or acids can react violently with acid anhydrides, alcohols, ketones, phenols, ammonia, hydrocyanic acid, hydrogen sulfide, halogens, phosphorus, isocyanates, strong alkalis and amines (American Conference of Governmental Industrial Hygienists, 1991)... 

The reduction of dihydro-1,4-thiazines to tetrahydro forms is achieved by the action of a variety of reagents including formic acid, hydrogen sulfide, sodium borohydride and lithium aluminum hydride. The last is particularly useful for the reduction of carbonyl derivatives, although in the case of the amide (105) only partial reduction is effected, leading in due course to the thiazine (106), the hydroxyethyl side chain of which then cyclizes to position 5 of the ring to yield the bicyclic product (107 Scheme 45) (66CPB742). 

The acid components given off to the air by the various processes of combustion are sulfur dioxide and sulfurous add, sulfuric acid, hydrogen sulfide, hydrochloric acid, carbon dioxide and carbonic acid, and tar acids. There is little doubt that the material uf greatest importance in respect to atmospheric corrosion in this group is sulfur dioxide. Generally, the total acidity of the atmosphere is closely related to the sulfur dioxide content. 

Other soluble acidic components such as sulfuric acid, hydrogen sulfide, hydrochloric acid, nitric acid and the like are all of minor importance. Carbon dioxide and carbonic acid play a significant role in acid decomposition. 

Thus, among the sulfur amino acids, hydrogen sulfide is a likely derivative of cysteine, and dimethyl disulfide is a likely derivative of cystine. The formation of dimethyl sulfide and dimethyl disulfide from methionine is readily deduced from expected recombinations of thiomethyl and methyl free radicals. Dimethyl disulfide is the major product. 

The RO product of brackish water may contain between 200-500 ppm of TDS, which is basically NaCl, and a smaller portion of other salts. Some minor constituents, such as boric acid, hydrogen sulfide and C02, may also be present in the product depending on the composition of the feed water, but may be removed with adequate pre- or post-treatment. Feed water containing dissolved volatile organic compounds will generate water, unless special care is taken, that is slightly contaminated with the same components. This may be true for RO and evaporation techniques. 

Where At is total alkalinity and Aj are other alkalinity contributing components. In many natural waters, numerous components such as boric acid, hydrogen sulfide, phosphate, and organic compounds contribute to alkalinity, making precise determination of carbonate alkalinity difficult. It is convenient to envision components such as H+ as contributing to alkalinity in a negative manner. 

Alkali treatment of proteins is becoming more common in the food industry and may result in several undesirable reactions. When cystine is treated with calcium hydroxide, it is transformed into amino-acrylic acid, hydrogen sulfide, free sulfur, and 2-methyl thia-zoIidine-2,4-dicarboxyIic acid as follows ... 

It is the H+ ion that makes the solution acidic. Hydrogen sulfide is diprotic because it has two reactions that both form the hydrogen ion. Furthermore, when hydrogen sulfide is dissolved in water it exists as three species - the molecular form (H2S) and the two ionic forms the bisulfide ion (HS ) and the sulfide ion (S2 ). 

The alkaline environment also precipitates calcium and phosphate ions from the GCF, causing dental calculus. Dental calculus interferes with self-administered oral hygiene (Sect. 13.1.2) and asaccharolytic metabolism intensifies. When sulfur-containing amino acids (cysteine and methionine) are metabohzed, they release hydrogen sulfide along with the ammonia and short chain fatty acids. Hydrogen sulfide is a major contributor of oral malodor that often accompanies moderate to severe periodontal disease. 

Sulfur is plentiful in naturally occurring compounds. Inorganic sulfates can be reduced via the sulfide and incorporated into amino acids. Hydrogen sulfide is used as a source of sulfur by some microorganisms. Organic sulfur may represent an alternative sulfur-containing nutrient. 

Pure Folpet is a white crystalline solid with a reported melting point of 177 °C. Solubility in water is only 1 ppm at room temperature. In the dry state, it is stable at room temperature, but it is hydrolysed in an aqueous solution at a rate that depends on the pH. Degradation products and hydrolysis in water can be carbon dioxide, hydrochloric acid, hydrogen sulfide, phthalamic acid, and phthalic acid. 

High purity grade chemicals, inorganic refined from technical grades Hydrated alumina silicate powder Hydrazine Hydrochloric acid Hydrocyanic acid Hydrogen sulfide Hydrosulfites Hypophosphites Indium chloride Inorganic acids, except nitric or phosphoric Iodides... 

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