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Topic: Trichloromethane

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	EPA: Federal Register: Fortieth Report of the TSCA Interagency Testing Committee to the Administrator; Receipt of ...
		Trichloromethane sulfenyl chloride is being removed from the Priority Testing List because adequate subchronic toxicity data have been submitted to the ITC, monitoring data indicate that trichloromethane sulfenyl chloride is not likely to result in significant exposures to workers, and no additional U.S. Government data needs have been identified at this time.
		Trichloromethane sulfenyl chloride (CAS No. 594-42-3) is being removed from the Priority Testing List because adequate subchronic toxicity data have been submitted to the ITC, monitoring data indicate that trichloromethane sulfenyl chloride is not likely to result in significant exposures to workers, and no additional U.S. Government data needs have been identified at this time.
		Trichloromethane sulfenyl chloride was a member of a group of 35 HPVCs that were recommended for 90-day subchronic toxicity testing in the ITC's 27th Report (56 FR 99534, March 6, 1991).
	www.epa.gov /fedrgstr/EPA-PEST/1997/June/Day-04/p14578.htm (4110 words)

	NPI: Chloroform (trichloromethane) fact sheet
		It describes how you might be exposed to this substance, how exposure might effect you and the environment, common uses, comparative data about chloroform (trichloromethane) and its physical and chemical properties.
		A ranking and total hazard score was given based on health and environmental hazards and human and environmental exposure to the substance.
		Trichloromethane, methyl trichloride, methane trichloride, formyl trichloride, methenyl trichloride, trichloroform, TCM, Freon 20, Refrigerant R20
	www.npi.gov.au /database/substance-info/profiles/23.html (1478 words)

	Sample Chemistry Multiple Choice Paper
		When a small amount of iodine is shaken with trichloromethane, and water containing dissolved potassium iodide, a purple trichloromethane and a brown aqueous layer are obtained.
		The brown colour of the aqueous layer becomes paler in colour, but the purple colour of the trichloromethane layer does not change.
		Neither the purple colour of the trichloromethane layer, nor the brown colour of the aqueous layer changes in any way.
	richardbowles.tripod.com /chemistry/paper1/paper1.htm (1609 words)

	Journal of Carcinogenesis \| Full text \| Analysis of in vivo and in vitro DNA strand breaks from trihalomethane exposure
		The purpose of this study was to examine the ability of the THMs, trichloromethane (TCM), bromodichloromethane (BDCM), dibromochloromethane (DBCM), and tribromomethane (TBM), to induce DNA strand breaks (SB) in (1) CCRF-CEM human lymphoblastic leukemia cells, (2) primary rat hepatocytes (PRH) exposed in vitro, and (3) rats exposed by gavage or drinking water.
		Trichloromethane (TCM) is most often the predominant THM formed during chlorine disinfection; however, the brominated methanes, bromodichloromethane (BDCM), dibromochloromethane (DBCM), and tribromomethane (TBM) may be formed at levels comparable to or exceeding that of chloroform depending on the concentration of bromine in the water [3].
		Trichloromethane (TCM; 99+%; CAS 67-66-3) was obtained from Fisher Scientific Co. (Cincinnati, OH).
	www.carcinogenesis.com /content/3/1/2 (5113 words)

	IUPAC-NIST Solubilities Database
		The water-rich mixture was studied using gas-liquid chromatography in which a mixture of methane and trichloromethane vapor passed through the sampling loop.
		The eluted trichloromethane was determined with a flame ionization detector.The Organic-rich mixture was studied using an isopiestic method in which a CaCl
		The water concentration of the sample was determined using a Karl Fischer titration apparatus.
	srdata.nist.gov /solubility/sol_detail.asp?sys_ID=60_208 (92 words)

	MIT Center for Global Change Science Report 64 (Site not responding. Last check: 2007-10-10)
		We note, however, that the best estimate of corrections factors for land-based grid cells presented here indicate that the RCEI emissions for trichloroethene and tetrachloroethene need to be increased by a factor of ~2 to explain the observations.
		Only anthropogenic sources of trichloromethane were gridded in the initial (RCEI) inventory representing roughly 11% of estimated global emissions.
		We find that these emissions are, as expected, too low to explain the observations and that a land-based correction factor ~12 is required to produce emissions estimates that are consistent with natural sources (e.g., soil emissions).
	web.mit.edu /cgcs/www/MIT_CGCS_Rpt64.html (640 words)

	Hydrolysis
		Trichloromethane would be expected to be even slower than dichloromethane in its reaction with hydroxide ions.
		is formed after abstraction of a proton from trichloromethane, hydroxide acting as a base:
		The overall reaction of trichloromethane with hydroxide ions is therefore
	www.rod.beavon.clara.net /hydrolys.htm (498 words)

	Multiple substitution in the methane and chlorine reaction
		Having produced some chloromethane there is no way that you can prevent it from being hit by chlorine radicals, and similarly for dichloromethane and trichloromethane.
		If you wanted tetrachloromethane, you could of course get it by using a large excess of chlorine, so that eventually all the hydrogens would be replaced.
		If you wanted mainly chloromethane, you could favour this by using a huge excess of methane so that the chances were always greater of a chlorine radical hitting a methane rather than anything else - but even so, you would still get some mixture of products.
	www.chemguide.co.uk /mechanisms/freerad/multisubcl.html (704 words)

	New Mexico Water Resources Research Institute Document Abstract (Site not responding. Last check: 2007-10-10)
		The biological dehalogenation of common water pollutants such as trichloromethane (chloroform) and other halogenated aliphatic compounds was the subject of this project.
		Samples from diverse water environments such as from groundwater contaminated with halogenated compounds and wastewater from regional treatment plants were studied to identify microorganisms in samples from a secondary anaerobic digestor were able to dechlorinate trichloromethane but not dichloromethane (DCM) and samples from a denitrification tank were able to dechlorinate DCM but not trichloromethane.
		Gene probe analyses of DNA extracted from the dichloromethane-degrading wastewater indicated the presence of the gene coding for dichloromethane dehalogenase, indicating the genetic basis for the dechlorination activity observed.
	wrri.nmsu.edu /publish/techrpt/abstracts/abs298.html (459 words)

	American College of Medical Toxicology
		It is metabolized by the liver into two hepatotoxins namely trichloromethane free radical and phosgene.(see later discussion) As with most other halogenated inhalational anesthetics, chloroform is rapidly eliminated through the pulmonary system with an elimination half life of about 1.5 hours.
		First the sulfur group of glutathione, which is an excellent free radical scavenger, is oxidized by the trichloromethane radical.
		Second, phosgene undergoes nucleophilic attack twice by glutathione to form diglutathionlydithiocarbonate which cannot be hydrolyzed to regenerate glutathione.
	www.ijmt.net /ijmt/1_2/1_2_16.html (1601 words)

	Chloromethane Combustion (Site not responding. Last check: 2007-10-10)
		The laminar flame speeds of blends of dichloromethane and trichloromethane with methane at room temperature and atmospheric pressure were experimentally determined using the counterflow twin-flame technique, varying both the amount of chlorinated compound in the fuel and the equivalence ratio of the unburned mixture.
		A detailed kinetic model previously employed for simulation of chloromethane combustion was expanded to include the oxidation kinetics of dichloromethane and trichloromethane.
		Numerical simulation shows that the expanded kinetic model predicted the flame speeds to within 3 cm/s of the measured values.
	www.princeton.edu /~cnflab/kinetics/lwz001 (150 words)

	Anaesthetics
		It is far more powerful than nitrous oxide, but has been proved to cause serious liver damage.
		Ethoxyethane and cyclopropane are good anaesthetics and have less serious side effects than trichloromethane, but are highly flammable, which can be very dangerous.
		Halothane is a commonly used anaesthetic, but also has rare effects of arrhythmia (abnormal heart rhythm) and liver damage.
	home.clara.net /pfnicholls/science/drugs/Anaesthetics.html (689 words)

	trichloromethane - HighBeam Encyclopedia (Site not responding. Last check: 2007-10-10)
		Find newspaper and magazine articles plus images and maps related to "trichloromethane" at HighBeam.
		MOC STARTED INVESTIGATION OF DUMPING OF TRICHLOROMETHANE IN CHINA
		More information is at your fingertips at HighBeam Research:
	www.encyclopedia.com /doc/1E1-x-trichlor.html (108 words)

	ATSDR - Public Health Statement: Chloroform
		You must also consider the other chemicals you're exposed to and your age, sex, diet, family traits, lifestyle, and state of health.
		Chloroform is also known as trichloromethane or methyltrichloride.
		It is a colorless liquid with a pleasant, nonirritating odor and a slightly sweet taste.
	www.atsdr.cdc.gov /toxprofiles/phs6.html (2427 words)

	UNIDO (Site not responding. Last check: 2007-10-10)
		Country studies and lthe country program prepared during 1992-3 have identified the sector as a high priority area.
		Considering the various alternatives process conversion, plant closure, emissions control technology, industrial rationalisation etc. trichloromethane has bee nselected as the best possible alternative, from technical and safety points of view.
		Impact of the project on country's Montreal Protocol obligations: The project will eliminate 69.7 ODP tonnes of CTC consumption from the solvent sector, which currently constitutes 40% of the country's ODS consumption.
	www.unido.org /Data/Project/Project.cfm?c=10952 (191 words)

	Geotimes January 2000 Bad Compounds (Site not responding. Last check: 2007-10-10)
		The data came from water collected between 1985 and 1995.
		The three other main culprits contaminating groundwater were trichloromethane, tetrachloroethene and trichloroethene.
		Chloroform, the common name for trichloromethane, is a byproduct of water treatment and distribution that is then recycled back into the groundwater by lawn irrigation, leaking pipes and sewers.
	www.agiweb.org /geotimes/jan00/newsnotes/compounds.html (829 words)

	help!!!!can anyone answer my question!!!!!!!!!
		It all depends on the type of solution, whether it is an ideal solution, non-ideal solution etc...this pertains to the attraction characteristics between the two components.
		If it is a ideal solution, then the mixtures will exhibit boiling point elevation with the higher boiling points exhibited by the mixture rather the the individual pure solutions (this is what you have with the trichloromethane and ethyl ethanoate), quite different for the vice versa situation.
		I'll try to explain it in more detail if you're still wondering about it.
	www.physicsforums.com /showthread.php?t=75498 (224 words)

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