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Topic: Propanoic acid

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	Patent 4628099: Trifluoromethyl pyridinyloxyphenoxy propanoic acid chlorides
		The propanoic acid compounds of the invention after conversion to the acid chloride may also be reacted with (a) ammonia to form the simple amide, (b) with an alkyl amine to form an N-alkyl amide or N,N-dialkyl amide, or (c) with a methoxy amine to form an alkoxy amide.
		The theoretical composition of 2-(4-((5-trifluoromethyl)-2-pyridinyl)thio)phenoxy)propanoic acid is 52.5% carbon; 3.5% hydrogen; 4.08% nitrogen and 9.34% sulfur.
		The theoretical composition of 2-(4-((3-chloro-5-trifluoromethyl)-2-pyridinyl)thiophenoxy)propanoic acid is 47.69% carbon; 2.93% hydrogen; 3.70% nitrogen; 9.38% chlorine and 8.48% sulfur.
	www.freepatentsonline.com /4628099.html (6612 words)

	ACRYLIC ACID - (Organic Method #28) (Site not responding. Last check: 2007-11-06)
		Propanoic acid, a saturated precursor of acrylic acid, can be resolved from acrylic acid in a 13 min analysis at 1 mL/min flow rate using a 0.1% aqueous phosphoric acid mobile base.
		An amount of acrylic acid equivalent to twice the target concentration for a 4-h air sample was spiked onto glass wool contained in a section of glass tubing that was mounted ahead of two sampling tubes.
		Propanoic acid, the saturated form of acrylic acid, is only partially resolved from acrylic acid under the routine analytical conditions.
	www.osha.gov /dts/sltc/methods/organic/org028/org028.html (3940 words)

	Propanoic Acid, and its Calcium and Sodium Salts; Exemption from the Requirement of a Tolerance
		Propanoic acid is formed as the body oxidizes longer chain odd-numbered fatty acids or the side chain of cholesterol.
		Propanoic acid demonstrates an acute toxicity profile that is consistent with that of an acid: it is highly acutely toxic for eye and dermal irritation, i.e., it is corrosive to the eyes and skin.
		The JECFA monograph deemed propanoic to be of such low concern that the acceptable daily intake is ``not specified.'' A consideration in this decision was the understanding that ``propionate is a normal intermediary metabolite, and a normal constituent of foods.'' Propanoic acid and its calcium and sodium salts are FDA affirmed GRAS direct food additives.
	www.epa.gov /fedrgstr/EPA-PEST/2003/January/Day-13/p615.htm (4458 words)

	Patent 4100350: 3-Substituted propanoic acid derivatives
		This invention relates to propanoic acid derivatives substituted in the 3-position by a cyclopentenyl group and to a method by which such compounds may be prepared.
		The salts of the acids of formula II are preferably alkali metal salts such as the sodium or potassium salts and, if these are prepared by optional step (i) above, that preparation may be readily accomplished by reaction of the acid with an appropriate base such as an alkali metal hydroxide, carbonate or hydrogen carbonate.
		Thus the free acids of formula II may be reacted with an optically active amine such as (-)-ephedrine or (+)- and (-)-.alpha.-methylbenzylamine, the difference in the solubility of the diastereoisomers obtained permitting selective recrystallisation of one form and regeneration of the optically active acids of formula II from the mixture.
	www.freepatentsonline.com /4100350.html (1408 words)

	EPA: Federal Register: Propanoic Acid; Pesticide Tolerance
		The petition requested that 40 CFR 180 be amended by establishing an exemption from the requirement of a tolerance for residues of the fungicide propionic acid, in or on the raw agricultural commodities sugar beets, potatoes, and sweet potatoes.
		Accordingly, EPA finds that exempting propanoic acid, and its calcium and sodium salts from the requirement of a tolerance will be safe for the general public, including infants and children.
		(b) Propanoic acid is exempt from the requirement of a tolerance forresidues in or on meat and meat byproducts of cattle, sheep, hogs, goats,horses, and poultry, milk, and eggs when applied as a bactericide/fungicide to livestock drinking water, poultry litter, and storage areas for silage and grain.
	www.epa.gov /fedrgstr/EPA-PEST/2004/August/Day-04/p17799.htm (2200 words)

	AS/A2 Structure, Naming of Carboxylic Acids, Derivatives at Doc Brown's Chemistry Clinic. wpbchemhelp (Site not responding. Last check: 2007-11-06)
		The suffix part of the name is based on the carboxylic acid, but the "oic acid" becomes "oate" eg ethyl ethanoate, methyl ethanoate, pentyl butanoate etc. (lots of isomeric permutations as the total C number rises).
		The positions of the substituent(s) are denoted with a prefix eg amino, hydroxy, halo or alkyl groups etc., and the position denoted by using the lowest possible numbers for the associated carbon atoms in the main chain.
		The 'lowest' numbers are determined by assigning number 1 to the carbon of the carboxylic acid (or other derived) group at the end of the longest C atom chain.
	www.wpbschoolhouse.btinternet.co.uk /page06/RCOOHderivs.htm (444 words)

	Enantioselective Uptake and Degradation of the Chiral Herbicide Dichlorprop [(RS)-2-(2,4-Dichlorophenoxy)propanoic ...
		Enantioselective Uptake and Degradation of the Chiral Herbicide Dichlorprop [( RS)-2-(2,4-Dichlorophenoxy)propanoic acid] by Sphingomonas herbicidovorans MH
		acid] by a pure bacterial strain that was isolated from soil.
		Enantiomerization and enantioselective degradation of the chiral 2-phenoxypropionic acid herbicides.
	jb.asm.org /cgi/content/full/180/13/3368 (4001 words)

	Chapter 5. Synthesis of pyridazine amino acids (Site not responding. Last check: 2007-11-06)
		The full deprotection of 32, including decarboxylation, to produce the desired amino acid 33 was accomplished in a straightforward manner with concentrated HBr, as per the deprotection of the aminomethyl analogue 6.
		It being reasoned that the products of deprotection were diluting or altering the hydriodic acid, and possibly lowering the reflux temperature, the intermediate mixture was isolated on ion exchange resin with copious washings to remove traces of free iodine, and then re-refluxed with fresh acid for a further 9 hours whereupon the reaction was complete.
		It is worth noting in passing the care with which the deprotections of AMAA and ibotenic acid derivatives have been performed to avoid decarboxylation [ 31, 34 ] and that ibotenic acid apparently owes at least some of its in vivo activity to decarboxylation to muscimol [ 35 ].
	www.pharmacol.usyd.edu.au /thesis/5 (4877 words)

	Definition of Carboxylic acid (Site not responding. Last check: 2007-11-06)
		In chemistry, carboxylic acids (also called alkanoic acids) are organic acids characterized by the presence of a carboxyl group.
		So for example, trichloroacetic acid (three -Cl groups) is a stronger acid than lactic acid (one -OH group) which in turn is stronger than acetic acid (no helping group).
		Carboxylic acids react with bases to form carboxylate salts, in which the hydrogen of the -OH group is replaced with a metal ion.
	www.wordiq.com /definition/Carboxylic_acid (421 words)

	Understanding the names of organic compounds
		Propanoic acid is a three carbon acid with no carbon-carbon double bonds.
		As with the previous examples involving acids and acid derivatives, don't forget that the carbon in the -CN group counts as part of the chain.
		As with all acids the carbon chain is numbered so that the carbon in the -COOH group is counted as number 1.
	www.chemguide.co.uk /basicorg/conventions/names2.html (1504 words)

	Propionic acid - Reciprocal Net Common Molecules (Site not responding. Last check: 2007-11-06)
		Propanoic acid or propinoic acid is a short chain fatty acid.
		The calcium salt of propanoic acid is used as an antimolding agent and is an additive in breads.
		Esters of this carboxylic acid have a pleasant smell and taste and are used in the manufacture of fruit flavors and perfume bases.
	www.reciprocalnet.org /recipnet/showsample.jsp?sampleId=27344366 (195 words)

	102hw1519.htm (Site not responding. Last check: 2007-11-06)
		b) Propanoic acid has a higher boiling point than butanal because there is hydrogen bonding between propanoic acid molecules and only dipole-dipole attractions between butanal molecules.
		Acids turn blue litmus paper red, so this compound must be the acid propanoic acid.
		The products of acid hydrolysis are three carboxylic acids (fatty acids) instead of salts.
	www.pierce.ctc.edu /chemistry/m102/102HW1519.htm (198 words)

	[No title]
		Butanal and propanoic acid have almost the same molar mass yet the boiling point of propanoic acid is 141oC while the boiling point of butanal is 78 oC.
		(4) In propanoic acid you have a polar hydrogen (attached to an oxygen) which can hydrogen bond with the C=O in another acid molecule so there are more possibilities for interactions (hydrogen bonds) in the acid and therefore the bp increases since more energy is required to separate the molecules.
		Because of their structure, acids form dimers which has the effect of doubling their effective mass and also contributes to the higher boiling point.
	academic.pg.cc.md.us /~bgage/e3_021_ans.doc (503 words)

	Dorlands Medical Dictionary
		and folic acid deficiencies; it corresponds to the pronormoblast, but differs from it by its larger size, abundant basophilic cytoplasm, and reticulated, unclumped nuclear chromatin.
		The disorder is caused by deficiency of propionyl-CoA carboxylase activity due to defects in either subunit of the carboxylase; the term sometimes denotes also deficiency of this enzyme due to multiple carboxylase deficiency (q.v.). 2.
		t[schwa]-noid) any of a group of complex fatty acids derived from arachidonic acid, being 20 carbons in length with an internal five- or six-carbon ring; examples are the prostaglandins, prostanoic acid, and the thromboxanes.
	www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_p_36zPzhtm (4649 words)

	AllRefer.com - propanoic acid, 2-methyl- (Organic Chemistry) - Encyclopedia
		AllRefer.com - propanoic acid, 2-methyl- (Organic Chemistry) - Encyclopedia
		propanoic acid, 2-methyl-, IUPAC name for isobutyric acid (see butyric acid).
		More articles from AllRefer Reference on propanoic acid, 2-methyl-
	reference.allrefer.com /encyclopedia/X/X-propanoi.html (115 words)

	l tryptophan -- l tryptophan (Site not responding. Last check: 2007-11-06)
		The case L-tryptophan, a naturally-occurring amino acid once widely used as a sleep aid, and freely available on shelves of health food stores, is a prime example.
		Essential amino acids must be received in the diet from food or dietary supplements...
		Acid hydrolysed L-tryptophan and its role in the attraction of the green lacewing Chrysoperla...
	www.neurobalancenow.com /aminoacid/ltryptophan (1241 words)

	Table 1 (Site not responding. Last check: 2007-11-06)
		This convention is useful to avoid various nomenclatural problems but should not be taken to imply that these structures represent an appreciable fraction of the amino-acid molecules.
		c The fully systematic forms ethanoic, propanoic, butanoic and pentanoic may alternatively be called acetic, propionic, butyric and valeric, respectively.
		d The symbol Asx denotes Asp or Asn; likewise B denotes N or D. Glx and Z likewise represent glutamic acid or glutamine or a substance, such as 4-carboxyglutamic acid, Gla ( 3AA-15.2.6), or 5-oxoproline, Glp ( 3AA-16.5), that yields glutamic acid on acid hydrolysis of peptides.
	www.chem.qmw.ac.uk /iupac/AminoAcid/tab1.html (313 words)

	Multiple Choice Quiz (Site not responding. Last check: 2007-11-06)
		4.) Ester formation requires a carboxylic acid and an alcohol.
		d.) the salt of an ester or carboxylic acid.
		13.) Amide formation requires a carboxylic acid and an amine.
	wey238ab.ch.iup.edu /tutor12/tutorquiz4.htm (188 words)

	Macromolecular Nomenclature Note No. 7
		The need for a convenient and accurate nomenclature to describe cascade polymers was apparent from the difficulty and time required to name even the simplest of these structures using the rules for organic molecules.
		These names obscure the number and type of terminal moieties, the constituency of the initiator core, and the structural similarity of the two molecules.
		A series of acid-terminated polyamido cascades (1: Z = 36; G = 2) have been prepared (9,10) and are readily described by the family name: Z-cascade:methane[4]:(3-oxo-6-oxa-2-azaheptylidyne):(3-oxo-2-azapentylidyne)G-1:propanoic acid, where Z is the number of terminal acid groups, and G is the number of generations.
	www.polyacs.org /nomcl/mnn7.html (990 words)

	•Ä‘“Á—öJö•ñ 20040106788 - Highly enantiomerically pure lactam-substituted propanoic acid ... (Site not responding. Last check: 2007-11-06)
		Highly enantiomerically pure lactam-substituted propanoic acid derivatives and methods of making and using same
		The present invention relates to highly enantiomerically pure lactam-substituted propanoic acid derivatives and methods of making and using therefor.
		The invention involves a multi-step synthesis to produce the lactam compounds.
	cxp.paterra.com /jp/uspregrant20040106788.html (172 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		the simplest amino acid and the only one which does not exist as a L-enantiomer.
		The most polar of the nonpolar amino acids.
		PowerPoint-type presentation of info on amino acids and proteins by Warren Gallagher at U Wisconsin Eau Claire are viewable [with Acrobat Reader] at:
	www.mpcfaculty.net /ron_rinehart/30B/AmActabl.htm (303 words)

	Propanoic acid, 2-hydroxy-, 2-ethylhexyl ester, (S)- Registration
		Propanoic acid, 2-hydroxy-, 2-ethylhexyl ester, (S)- - Registration, import consent and bans
		Information on the status of this pesticide as legally registered for use, banned, cancelled or severely restricted for countries for which PAN has data.
		186817-80-1, Propanoic acid, 2-hydroxy-, 2-ethylhexyl ester, (S)-, Propanoic acid, 2-hydroxy-, 2-ethylhexyl ester, ?1(S)U-, Propanoicacid2hydroxy2ethylhexylesterS, Purasolv EHL
	www.pesticideinfo.org /Detail_ChemReg.jsp?Rec_Id=PC39676 (397 words)

	propanoic acid, 2-methyl- on Encyclopedia.com (Site not responding. Last check: 2007-11-06)
		IUPAC name for isobutyric acid (see butyric acid).
		(Potassium Sorbate/Sorbic Acid - Pyruvic Methyl Ester Acid).(list of chemical companies throughout the world with contact data)(Industry Overview)(Cover Story)
		Characterization of the dust/smoke aerosol that settled east of the World Trade Center (WTC) in Lower Manhattan after the collapse of the WTC 11 September 2001.
	www.encyclopedia.com /html/x/x-propanoi.asp (198 words)

	Appendix 2 - Alphabetical list of chemical names for the Classification of herbicides by site of action for weed ...
		2- [ [ [ [(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] amino] sulfonyl] benzoic acid
		2- [ [ [ [(4-methoxy-6-methyl-1,3,5-triazin-2-yl) methylamino] carbonyl] amino] sulfonyl] benzoic acid
		2- [ [ [ [ [4-(dimethylamino)-6-(2,2,2-trifluoroethoxy)-1,3,5-triazin-2-yl] amino] carbonyl] -amino] sulfonyl]-3-methylbenzoic acid
	cropandsoil.oregonstate.edu /weeds/Publications/app2-siteaction.htm (75 words)

	43 (Site not responding. Last check: 2007-11-06)
		Ethyl 2-acetamido-2-ethoxycarbonyl-3-(6-ethoxypyridazine-3(2 H)-on-2-yl)propanoate (2.5 g, 6.77 mmol, 42) was dissolved in hydroiodic acid (10 mL, 57%), and refluxed 15 hours.
		Evaporation of excess acid, followed by chromatography on Dowex 50W (H
		This was recrystalised from 30 mL of boiling ethanol/water (1:1), yielding fluffy white needles of 2-Amino-3-(6-hydroxypyridazin-3(2 H)-on-2-yl)propanoic acid (612 mg, 3.07 mmol, 45% overall, 43).
	www.pharmacol.usyd.edu.au /thesis/5/exp/43.htm (138 words)

	Chem 30B (Site not responding. Last check: 2007-11-06)
		The structures of propanoic acid and propanamide are shown below.
		[3] Show how propanoic acid hydrogen bonds to other propanoic acid molecules.
		While carboxylic acids have high boiling points due to their ability to form dimmers upon hydrogen bonding, amides have an even greater ability to hydrogen bond, and therefore a higher boiling point!
	c4.cabrillo.edu /chem30b/announcements/Exam_2_review.html (306 words)

	CSPS Pharmaceuticals, Inc. Price List
		You probably realize that our prices of amino acid derivatives are very low.
		To be able to keep the prices low and our operation not in a loss, we had to institute the "low order surcharge" for orders below $ 300.
		D-1-Oxo-1,2,3,4-tetrahydro-isoquinoline-3-carboxylic acid (Can be custom ordered/synthesized on order in about 3 weeks.)
	www.5z.com /csps/price.html (155 words)

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