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Topic: Ethanethiol

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	Natural Gas Bank - Fossil Fuel, Methane, Ethane, Butane, Propane, Carbon Dioxide, Nitrogen, Helium, Hydrogen Sulfide
		Gas with a significant amount of sulfur impurities, such as hydrogen sulfide, is termed sour gas; gas with sulfur or carbon dioxide impurities is acid gas.
		Processed natural gas that is available to end-users is tasteless and odorless, however, before gas is distributed to end-users, it is odorized by adding small amounts of thiols (usually ethanethiol) or tetrahydrothiophene, to assist in leak detection.
		Processed natural gas is, in itself, harmless to the human body, however, natural gas is a simple asphyxiant and can kill if it displaces air to the point where the oxygen content will not support life.
	www.naturalgasbank.com (3076 words)

	Ethanethiol - Wikipedia, the free encyclopedia
		Ethanethiol, also known as ethyl mercaptan, is an organic compound used as an odorant in natural gas and propane.
		Ethanethiol is also used as a starting material or an intermediate in the manufacture of certain types of plastics, insecticides, and antioxidants.
		Ethanethiol is a significant odorous component of skunk musk.
	en.wikipedia.org /wiki/Ethanethiol (313 words)

	Coadsorption of Ethanethiol with Sulfur, Oxygen, and Water on the Fe(100) Surface
		The reactivity of ethanethiol is reduced by the presence of preadsorbed sulfur or oxygen as indicated by the increasing decomposition temperature with increasing sulfur or oxygen coverage.
		Ethanethiolate is formed on adsorption, and its decomposition is limited by C-S bond cleavage followed by ethylene and ethane formation.
		Water physically adsorbs on the ethanethiolate overlayer and does not affect the adsorption and decomposition of the thiolate.
	pubs.acs.org /cgi-bin/abstract.cgi/langd5/1996/12/i02/abs/la950166r.html (232 words)

	Journal of the Brazilian Chemical Society - Complexometric determination of thallium(III) using ethanethiol as a ... (Site not responding. Last check: 2007-11-03)
		Thallium present in a given sample solution is first complexed with a known excess of EDTA and the surplus EDTA is titrated with standard zinc sulphate solution at pH 5-6(hexamine) using xylenol orange as the indicator.
		Ethanethiol was used as a 0.3 % solution in distilled water.
		Ethanethiol thus selectively demasks thallium from Tl(III)-EDTA complex through a change in the oxidation state of thallium (reduction) and thereby releases EDTA quantitatively.
	www.scielo.br /scielo.php?script=sci_arttext&pid=S0103-50532006000200014 (1749 words)

	Ethanol Decomposition Pathways on MoS2(0001) [Abstract]
		Ethanethiol is hypothesized to dissociatively adsorb as a thioethoxy surface species, which undergoes hydride elimination to give ethylene.
		Ethanethiol is thought to adsorb at catalytically active defect sites on the MoS2 basal plane, which are most likely coordinately unsaturated Mo+VI cations.
		The difference in reactivity between the thiol and aromatic organosulfur compound on MoS2 is thought to occur because of the difference in the C-S bond strengths in thiophene and ethanethiol.
	www.chem.mtu.edu /org/surface/publications/abstract_3.html (136 words)

	Physisorption and Chemisorption of Alkanethiols and Alkylsulfides on Au(111)
		Specular decay of Au(111) caused by adsorption of ethanethiol from the gas phase at a surface temperature of 223 K. The solid curve is the raw helium specular signal.
		While the pre-exponential factor should not be too greatly emphasized since it is notoriously difficult to measure, these data lead to the tentative conclusion that diffusion of the molecules across the surface is not likely to be responsible for this "bottleneck" to chemisorption.
		Arrhenius plots generated with the chemisorption rate for ethanethiol, butanethiol, hexanethiol, and decanethiol indicate that the activation barrier to chemisorption for these molecules is about 29 kJ/mol irrespective of the chain length.
	www.princeton.edu /~gscoles/theses/sean/chapter4.html (6806 words)

	Effect of pH and temperature on the kinetics of odor oxidation using chlorine dioxide. \| Government > Environmental ...
		Contrary to the aldehydes, ethanethiol or ethyl mercaptan (a model compound for methanethiol or methyl mercaptan) and dimethyl disulfide (DMDS) rapidly reacted with Cl[O.sub.2].
		The overall reaction was found to be second and third order for ethanethiol and DMDS, respectively.
		Moreover, an increase in pH from 3.6 to 5.1 exponentially increased the reaction rate of ethanethiol (e.g., [k.sub.2] = 25-4200 L/mol/sec from pH 3.6 to 5.1) and significantly increased the reaction rate of DMDS if increased to pH 9 ([k.sub.3] = 1.4 X [10.sup.6] [L.sup.2]/mo[l.sup.2]/sec).
	www.allbusiness.com /periodicals/article/685591-1.html (854 words)

	Short Abstract
		It was shown that the levels of chromium(V) formed in the presence of the four thiols studied is related to the amount of chromium bound to DNA in the presence of these thiols.
		Reaction of ethanethiol or propanethiol with chromium(VI) resulted in the formation of very similar chromium(V) species, and the presence of 5,5-dimethyl-1-pyrroline-N-oxide in these reactions altered the relative intensities of the chromium(V) species formed.
		, ethanethiol, propanethiol, dimercaptosuccinic acid, and glutathione, typically lead to the formation of thiyl (•SR) radical, and in the cases of cysteine and cysteamine to the formation of hydroxyl (•OH) radical.
	www.bozweb.com /thesis_web/toc.html (3510 words)

	scent gland of skunks and odors of skunk chemicals
		One such compound, ethanethiol (also called ethyl mercaptan), when added to natural gas (which is odorless), provides an instant warning of a gas leak.
		The smell of ethanethiol is detectable at a concentration of about 20 parts per trillion in air.
		Natural gas provided by the local utility contains an odorant such as ethanethiol at a much higher concentration (in the parts per million range), so that even a million-fold dilution of the treated gas with air yields an odorant concentration near the threshold of detection.
	dwb.unl.edu /Teacher/NSF/C10/C10Links/chemistry.about.com/library/weekly/aa051099a.htm (588 words)

	Haz-Map: Occupational Exposure to Hazardous Agents
		Thiols (or mercaptans, an older term) are a group of chemical compounds with structural similarity to alcohols, e.g., ethanethiol (C2H5SH) resembles ethanol (C2H5OH).
		Their strong and repulsive odor can warn users of an explosive gas that is leaking into the air.
		The thiols with higher vapor pressures can be acutely toxic in spill accidents causing respiratory irritation, coma, and death.
	hazmap.nlm.nih.gov /cgi-bin/hazmap_generic?tbl=TblAgents&id=709 (132 words)

	Journal of Analytical-Science.com : Atomic Absorption Spectroscopy
		Park, et al, have identified a number of volatile sulfur compounds in California wines with "sulfur-like" problems.
		Among these compounds dimethyl sulfide and ethanethiol were the most frequently found, with significant occurrence of diethyl disulfide and some methanethiol.
		There is some question, as to whether "usual" cultural applications of elemental sulfur in the vineyard leave enough sulfur residue on the berries to potentially cause significant amounts of sulfur compounds in a wine.
	www.analytical-science.com /Journal/atomicabsorption_2002.htm (2407 words)

	JAWMA Paper: Effect of pH and Temperature on the Kinetics of Odor Oxidation Using Chlorine Dioxide (Site not responding. Last check: 2007-11-03)
		Kinetic analysis indicated that ClO2 does not react with hexanal and 2-methylbutanal regardless of pH and temperature and implied that aldehyde removal occurs primarily via mass transfer.
		Contrary to the aldehydes, ethanethiol or ethyl mercaptan (a model compound for methanethiol or methyl mercaptan) and dimethyl disulfide (DMDS) rapidly reacted with ClO2.
		Moreover, an increase in pH from 3.6 to 5.1 exponentially increased the reaction rate of ethanethiol (e.g., k2 = 25- 4200 L/mol/sec from pH 3.6 to 5.1) and significantly increased the reaction rate of DMDS if increased to pH 9 (k3 = 1.4 x 106 L2/mol2/sec).
	www.awma.org /Journal/ShowAbstract.asp?Year=2003&PaperID=1121 (425 words)

	Ethanethiol - toxicity, ecologicial toxicity and regulatory information
		Ethanethiol - toxicity, ecologicial toxicity and regulatory information
		Ethanethiol - Identification, toxicity, use, water pollution potential, ecological toxicity and regulatory information
		There may be other diseases and chemicals that have similar symptoms.
	www.pesticideinfo.org /Detail_Chemical.jsp?Rec_Id=PC38520 (689 words)

	NationMaster - Encyclopedia: Methane (Site not responding. Last check: 2007-11-03)
		General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Atomic mass 32.
		Ethanethiol (common name ethyl mercaptan) is a colorless liquid that has a strong odor, resembling that of rotten eggs.
		A principal component of natural gas, methane is a significant fuel.
	www.nationmaster.com /encyclopedia/Methane (7268 words)

	Ethanethiol - Manufacturer, Suppliers, Exporter, Import & Export
		Ethanethiol - Manufacturer, Suppliers, Exporter, Import & Export
		You are here: Home » Suppliers selection » Ethanethiol
		With ExportPages you will find international Suppliers, Manufacturers and Exporters of Ethanethiol from around the world.
	www.exportpages.com /auswahlc/59991/Ethanethiol/1/0/data.html (50 words)

	petrolpump.co.in : energy sources, Natural gas, Future energy development, Chemical composition, Energy content, Power ...
		This can be improved by adding other organic material (plants as well as slaughter house waste) to the digester.
		In any form, a strong bad scent (such as ethanethiol) is deliberately added to the otherwise colorless and odorless gas, so that leaks can be detected by the smell before an explosion occurs.
		In mines, sensors are used and mining apparatus has been specifically developed to avoid ignition sources (e.g.
	www.petrolpump.co.in /energy-sources/natural-gas.htm (1145 words)

	Pyrazine Ethanethiol CAS 35250-53-4 Suppliers & Manufacturers, Price
		Pyrazine Ethanethiol CAS 35250-53-4 Suppliers and Manufacturers, Price
		We offer a wide range of products in many categori More...
		1 to 1 of 1 pyrazine ethanethiol suppliers
	www.chemicalregister.com /Pyrazine_Ethanethiol/Suppliers/pid23532.htm (78 words)

	Facile Palladium-Mediated Conversion of Ethanethiol Esters to Aldehydes and Ketones
		Facile Palladium-Mediated Conversion of Ethanethiol Esters to Aldehydes and Ketones
		Treatment of ethanethiol esters with triethylsilane and palladium on carbon at ambient temperature furnished aldehydes.
		In addition, a variety of ketones has been prepared by a palladium-catalyzed reaction of ethanethiol esters with organozinc reagents.
	www.organic-chemistry.org /abstracts/literature/552.shtm (133 words)

	Advance Scientific and chemical - , chemical company, chemical compound, spectrum chemical, chemical distributor, ...
		DOT: Ethyl mercaptan, 3, UN2363, PG Imarine pollutant
		For Bulk quotations on "Ethanethiol", be sure to contact our Bulk Chemical Department at 1-800-524-2436.
		Advance carries the largest catalog of ACS, Reagent, USP/NF, FCC and technical/commercial chemicals nationwide.
	www.advance-scientific.com /Properties.asp?CODE=E2043 (109 words)

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