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Topic: Methylamine

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	METHYLAMINE - (Organic Method #40) (Site not responding. Last check: 2007-10-12)
		This is the amount of methylamine spiked on the sampling device which allows recovery of an amount of methylamine equivalent to the detection limit of the analytical procedure.
		Methylamine is analyzed as a derivative which is specific, stable, and easier to quantitate than the free amine.
		Six methylamine samples were prepared with the vapor generator by sampling an air stream containing 10.9 ppm methylamine for 50 min at approximately 0.2 L/min.
	www.osha-slc.gov /dts/sltc/methods/organic/org040/org040.html (2856 words)

	NTP: Executive Summary Methylamine
		Methylamines are produced by the interaction of methanol and ammonia over a catalyst (zinc chloride) at high temperature.
		Methylamine has also been detected in milk (7.9 mol/100 g), cheese pizza (2.9mol/100 g), green beans (4.9mol/100 g), commercial samples of wine (0.19µg/mL in red wine, 0.14µg/mL in white wine), uncured and cured pork (1,490µg/kg and 730µg/kg, respectively), and at high levels in squid, octopus, and other seafoods (up to a mean of 255 ppm).
		Methylamine was deferred April 9, 1987 for environmental effects because releases of the chemical from manufacturing and processing do not appear to contribute significantly to the level of the chemical in the environment, where the amines are rapidly degraded.
	ntp-server.niehs.nih.gov /index.cfm?objectid=6F5FD8A7-F1F6-975E-7973B652E6B91B07 (1591 words)

	Methylamine - Wikipedia, the free encyclopedia
		Methylamine is a simple primary amine with a formula of CH Commercially, it is usually sold as a hydrochloride salt (powder), in alcoholic solutions, or as a pure chemical in pressurized metal containers.
		The fact that it is not sterically hindered due to its small size, and the relatively low electrophilicity compared to oxygen and fluorine make it particularly useful in electrophilic substitution.
		Methylamine is prepared commercially by the reaction of ammonia with chloromethane.
	en.wikipedia.org /wiki/Methylamine (198 words)

	NTP: Executive Summary Methylamine
		Methylamine has not been evaluated for skin absorption potential; however, it has been shown to be irritating to the skin of guinea pigs and the eyes of rabbits, and may be irritating to the gastrointestinal tract of guinea pigs following oral administration (Goffman and McGuire, 1980; ACGIH, 1993).
		Methylamine induced mutagenic responses at the tk locus in the mouse lymphoma cell forward mutation assay in the absence of S9 at concentrations in the range of 200-300 nl/ml (3-4 mM) and became lethal at approximately 400 nl/ml (5mM) (Caspary and Myhr, 1986; Shelby et al., 1987).
		Methylamine is formed in rats from the metabolism of endogenous compounds such as epinephrine (Schayer et al., 1952), sarcosine, glycine, and creatine (Davis and deRopp, 1961).
	ntp-server.niehs.nih.gov /index.cfm?objectid=6F5FD77E-F1F6-975E-71F0A5ADD232F645 (2959 words)

	DuPont Methylamines: Handling
		Methylamine spills, even if not ignited, should be thoroughly diluted with a water spray to minimize the fire hazard by raising the boiling and flash points.
		The methylamines are corrosive to copper, copper alloys, galvanized metal, magnesium, and zinc alloys.
		Wastewater containing small amounts of methylamines must be disposed of by procedures that comply with federal, state, and local water pollution regulations.
	www.dupont.com /methylamines/storage.html (2822 words)

	Documentation for Immediately Dangerous to Life or Health Concentrations (IDLHs)
		Deichmann and Gerarde [1969] stated that inhalation of methylamine vapors (greater than 100 ppm) causes irritation of the nose and throat, followed by violent sneezing, burning sensation of the throat, coughing, constriction of the larynx and difficulty in breathing, pulmonary congestion, and edema of the lungs.
		Human data: It has been reported that transient irritation of the eyes, nose, and throat has resulted from brief exposures to concentrations of 20 to 100 ppm; the odor was intolerable at 100 to 500 ppm [Clayton and Clayton 1981].
		Inhalation of methylamine vapors (at concentrations greater than 100 ppm) has caused irritation of the nose and throat, followed by violent sneezing, burning sensation of the throat, coughing, constriction of the larynx and difficulty in breathing, pulmonary congestion, and edema of the lungs [Deichmann and Gerarde 1969].
	www.cdc.gov /niosh/idlh/74895.html (247 words)

	Methylamine Synthesis FAQ
		However, the methylamine produced by this method is eminently suitable for the many purposes normally intended and if allowed to sublimate some when heating, no adjustment for "purity" or "water content" need be made in subsequent uses of it.
		Methylamine HCl is insoluble in Chloroform whereas Hexamine is at the rate of 1g to 10mL.
		The distillate weighed 37.3 grams, the residue which didn't crystallize weighed 326 grams, and the total yield of methylamine hydrochloride was 82.5 grams, or 37% of theory.
	www.erowid.org /archive/rhodium/chemistry/methylamine.html (2661 words)

	Sciencemadness Discussion Board - Powered by XMB (Site not responding. Last check: 2007-10-12)
		Methylamine boils at 48 C so I could destilate over the methylamine and condens it down in hcl to gain methylamine HCl.
		If you have a saturated solution of methylamine at 12.5 C (where 1154 vols of the gas are soluble) and heat it to 25 C where only 959 vols are soluble, the difference will come out of solution.
		Once the methylamine is cooled down all that remains is to wash it with chloroform.
	www.sciencemadness.org /talk/viewthread.php?tid=1261 (2272 words)

	MAPS: primary amines in 'Ecstasy' pills
		Methylamine is usually used in large XS during production and then washed out or recycled.
		Benzylamine is from an incomplete reduction of methylbenzylamine (an in situ methylamine source)to toluene.
		Methylamine is very carcinogenic and outright toxic (the two are frequently inversely related, but in this case it is both).
	www.maps.org /pipermail/maps_forum/2002-June/004370.html (865 words)

	JAWMA Paper: Bioconversion of Methylamine in Biofilters (Site not responding. Last check: 2007-10-12)
		Bioconversion of methylamine (MA) was studied using two sets of biofilters arranged in three stages and packed with inoculated peat-based media of initial pH 7.89 and 4.77, respectively.
		Maximum rate of nitrification was 0.69 g nitrogen per m 3 medium per hour, which occurred in the middle stage of the filter with the medium at a pH of 7.6 and containing a moisture of 55%.
		Nitrogen compounds such as ammonia and methylamines are odorants generally found in waste treatment, render-ing, and chemical plants.
	www.awma.org /Journal/ShowAbstract.asp?Year=&PaperID=330 (322 words)

	Pfam 19.0 : Me-amine-dh_H (Site not responding. Last check: 2007-10-12)
		Methylamine dehydrogenase () is a periplasmic quinoprotein found in several methyltrophic bacteria PUBMED:8021187.
		It is induced when grown on methylamine as a carbon source MADH and catalyses the oxidative deamination of amines to their corresponding aldehydes.
		Electrons derived from the oxidation of methylamine are passed to an electron acceptor, which is usually the blue-copper protein amicyanin ().
	pfam.wustl.edu /cgi-bin/getdesc?name=Me-amine-dh_H (172 words)

	Explaining the strength of organic bases
		Methylamine is typical of aliphatic primary amines - where the -NH group is attached to a carbon chain.
		The nitrogen is more negative in methylamine than in ammonia, and so it picks up a hydrogen ion more readily.
		The ion formed from methylamine is more stable than the one formed from ammonia, and so is less likely to shed the hydrogen ion again.
	www.chemguide.co.uk /basicorg/acidbase/bases.html (921 words)

	Vasoactive effects of methylamine in isolated human blood vessels: role of semicarbazide-sensitive amine oxidase, ...
		Methylamine metabolism to formaldehyde by vascular semicarbazide-sensitive amine oxidase.
		Dissociation by methylamine of insulin release from glucose-induced electrical activity in isolated mouse islets of Langerhans.
		The enhanced daily excretion of urinary methylamine in rats treated with semicarbazide or hydralazine may be related to the inhibition of semicarbazide-sensitive amine oxidase activities.
	ajpheart.physiology.org /cgi/content/full/286/2/H667 (5807 words)

	Location of Benzene in NaBeta Zeolite upon Coadsorption of Ammonia and Methylamine: A Further Confirmation of Molecular ...
		The adsorption of a single component such as ammonia and methylamine in NaBeta zeolite has been first investigated by means of in-situ infrared spectroscopy, and the effect of coadsorption of ammonia and methylamine on the location of benzene has been then checked.
		It is found that the interaction of ammonia and methylamine with NaBeta causes an important modification of lattice parameters, indicating the deformation of zeolite framework.
		Despite this deformation of zeolite framework upon coadsorption of either ammonia or methylamine, only adsorption of benzene in Na ions and no change in the location of benzene are observed.
	pubs.acs.org /cgi-bin/abstract.cgi/langd5/2000/16/i14/abs/la0000670.html (422 words)

	British Journal of Pharmacology - Abstract of article: Methylamine, but not ammonia, is hypophagic in mouse by ... (Site not responding. Last check: 2007-10-12)
		Methylamine, but not ammonia, is hypophagic in mouse by interaction with brain Kv1.6 channel subtype
		Ammonia and methylamine (MET) are endogenous compounds increased during liver and renal failure, Alzheimer's disease, vascular dementia and diabetes, where they alter some neurobehavioural functions probably acting as potassium channel blockers.
		Reverse transcription−polymerase chain reaction, Western blot and immunohistochemical results indicate that a full expression in the brain of Kv1.6 is required only for the activity of MET, and confirms the different action mechanism of ammonia and MET.
	www.nature.com /bjp/journal/v142/n2/abs/0705740a.html (322 words)

	The Amber Codon in the Gene Encoding the Monomethylamine Methyltransferase Isolated from Methanosarcina barkeri Is ...
		The methylamines are significant precursors for methane formation in marine and brackish environments (5).
		A, TMA-, DMA-, or MMA-specific methylamine methyltransferases initiate methanogenesis by methylating their cognate corrinoid proteins, which are subsequently demethylated by MtbA to methylate the thiol of CoM.
		To examine the extent and manner of readthrough of the internal amber codon of the methylamine methyltransferase genes, the
	www.jbc.org /cgi/content/full/276/36/34252 (4689 words)

	Eleusis: The Methylamine FAQ v2.7
		Aqueous Methylamine (40%) is used to prepare animal hides for taxidermy, esp. when it is vital to preserve the hair.
		Purification of the Methylamine HCl is in order now, so transfer all of the crude product to a 500mL flask and add either 250mL of absolute Ethanol (see end of FAQ for preparing this) or, ideally, n-Butyl Alcohol (see Footnote 4).
		Heat on a water bath or with gentle electric heat to drive the Methylamine off as a gas into the same beaker of Hydrochloric acid used as a trap during the reaction.
	www.erowid.org /archive/rhodium/chemistry/eleusis/methylamine27.html (6307 words)

	Monomethylamine, CH3NH2, or "methylamine" or "aminomethane" is used in tanning, in the manufacture ...
		Monomethylamine, CH3NH2, or "methylamine" or "aminomethane" is used in tanning, in the manufacture of dyestuffs, in treatment of cellulose acetate rayon, and in organic synthesis.
		: Monomethylamine, CH3NH2, or "methylamine" or "aminomethane" is used in tanning, in the manufacture of dyestuffs, in treatment of cellulose acetate rayon, and in organic synthesis.
		Description: Monomethylamine is a colorless, flammable gas at room temperature and atmospheric pressure.
	www.c-f-c.com /gaslink/pure/monomethylamine.htm (128 words)

	The Methylamine FAQ
		Methylamination of Hydroquinone to result in the ring structure p-methylaminophenol, the Sulfate of which is the photographic developing agent Metol.
		Aqueous Methylamine (40%) is used to prepare animal hides for taxidermy, especially when it is vital to preserve the hair.
		Possession of Methylamine is not a felony, in any amount, though you may violate some hazardous waste and/or zoning rules above a certain quantity.
	nepenthes.lycaeum.org /Misc/methylamine.html (4836 words)

	Chemical Sciences: Acidity of Solutions of Weak Bases
		Let us calculate the pH of a solution of methylamine whose total concentration is 0.01 molar.
		As the strength of the acid or base increases, however, the assumption that essentially all of it is present in the unionized form begins to become less realistic as the following example shows.
		If methylamine had a base ionization constant whose value were two orders of magnitude greater, 4.18 x 10
	www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01154.htm (825 words)

	Ammonia Encyclopedia Article @ NaturalResearch.org (Natural Research) (Site not responding. Last check: 2007-10-12)
		Using an excess of ammonia helps minimise multiple substitution, and neutralises the hydrogen halide formed.
		Methylamine is prepared commercially by the reaction of ammonia with chloromethane, and the reaction of ammonia with 2-bromopropanoic acid has been used to prepare racemic alanine in 70% yield.
		Ethanolamine is prepared by a ring-opening reaction with ethylene oxide: the reaction is sometimes allowed to go further to produce diethanolamine and triethanolamine.
	www.naturalresearch.org /encyclopedia/Ammonia (2087 words)

	Sciencemadness Discussion Board - Powered by XMB
		I was surfing Rhodiums site and I found a meth synth that seems easy for me. Over the past 2 years or so my chemistry learning curve has moved well IMO.
		I just wanted to clarify that I am refering to methylamine hcl, not to be confused with methamphetamines themselves.
		I weep at the sight of flaming acetic anhydride.
	www.sciencemadness.org /talk/viewthread.php?tid=66 (777 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		Worst-case Release Scenario - Methylamine Our worst-case flammable release scenario is complete failure of the methylamine storage tank and all our safety systems.
		The evaporating methylamine could be involved in a vapor cloud explosion, however, according to the EPA's off-site consequence analysis software, the effects would not reach public receptors.
		Alternative Release Scenario---Methylamine A second RMP alternative release scenario involves the rupture of a methylamine pipe, resulting in the release of approximately 77,265 pounds of methylamine over a period of 85 minutes.
	www.rtk.net /rmp/sum7/NC/fac100000131216 (1206 words)

	Reactions of gaseous mono- and dihaloethenes with methylamine radical cation: a study of mechanism by Fourier transform ...
		Reactions of gaseous mono- and dihaloethenes with methylamine radical cation: a study of mechanism by Fourier transform ion cyclotron resonance spectrometry and ab initio molecular orbital calculation
		The gas-phase reactions of the methylamine radical cations A
		High-level ab initio calculation was used to establish the minimum reaction energy path of the reaction of the methylamine radical cation A
	www.impub.co.uk /abs/EMS05_0093.html (411 words)

	methylamine - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "methylamine" is defined.
		methylamine : Encarta® World English Dictionary, North American Edition [home, info]
		Methylamine : Online Plain Text English Dictionary [home, info]
	www.onelook.com /?w=methylamine&ls=a (146 words)

	Heterologous Expression of Correctly Assembled Methylamine Dehydrogenase in Rhodobacter sphaeroides -- Graichen et al. ...
		Heterologous Expression of Correctly Assembled Methylamine Dehydrogenase in Rhodobacter sphaeroides -- Graichen et al.
		Wang, Y., Sun, D., Davidson, V. Use of Indirect Site-directed Mutagenesis to Alter the Substrate Specificity of Methylamine Dehydrogenase.
		Sun, D., Jones, L. H., Mathews, F.S., Davidson, V. Active-site residues are critical for the folding and stability of methylamine dehydrogenase.
	jb.asm.org /cgi/content/abstract/181/14/4216 (526 words)

	Crystal Structure of a Methylamine Sorption Complex of Fully Dehydrated Fully Ca2+-Exchanged Zeolite X, ...
		The structure of a methylamine sorption complex of fully dehydrated fully Ca -exchanged zeolite X,
		The crystal was prepared by ion exchange in a flowing stream of 0.05 M aqueous Ca(NO for 3 days, followed by dehydration at 480
		Sixteen methylamine molecules have been sorbed per unit cell, two per supercage.
	pubs.acs.org /cgi-bin/abstract.cgi/langd5/2004/20/i21/abs/la040073m.html (322 words)

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