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street name for lysergic acid diethylamide (同)back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
having the characteristics of an acid; "an acid reaction"

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酸性の / 酸味のある,すっぱい(sour) / (言葉・態度などが)厳しい,しんらつな / 酸 / すっぱいもの / 《俗》=LSD

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/13 19:23:36」(JST)

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Isophthalic acid is an organic compound with the formula C₆H₄(CO₂H)₂. This colourless solid is an isomer of phthalic acid and terephthalic acid. These aromatic dicarboxylic acids are used as precursors (in form of acyl chlorides) to commercially important polymers, e.g. the fire-resistant material Nomex. Mixed with terephthalic acid, isophthalic acid is used in the production of resins for drink bottles. The high-performance polymer polybenzimidazole is produced from isophthalic acid.^[2]

Preparation

Isophthalic acid is produced on the billion kilogram per year scale by oxidizing meta-xylene using oxygen.^[2] The process employs a cobalt-manganese catalyst. In the laboratory, chromic acid can be used as the oxidant. It also arises by fusing potassium meta-sulphobenzoate, or meta-brombenzoate with potassium formate (terephthalic acid is also formed in the last case).

The barium salt (as its hexahydrate) is very soluble (a distinction between phthalic and terephthalic acids). Uvitic acid, 5-methylisophthalic acid, is obtained by oxidizing mesitylene or by condensing pyroracemic acid with baryta water.

References

^ Brown, H.C., et al., in Baude, E.A. and Nachod, F.C., Determination of Organic Structures by Physical Methods, Academic Press, New York, 1955.
^ ^a ^b Richard J. Sheehan "Terephthalic Acid, Dimethyl Terephthalate, and Isophthalic Acid" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2005.doi:10.1002/14356007.a26_193

External links

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Synthesis of Polysubstituted Benzenes from 2-Pyrone-4,6-dicarboxylic Acid

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Chemistry Letters 43(8), 1349-1351, 2014
… Cycloaddition reactions of a lignin-derived pyrone derivative, 2-pyrone-4,6-dicarboxylic acid, and its dimethyl ester with alkenyl acetates and alkynes under thermal conditions proceed with decarboxylation to give isophthalic acids and various mono- and disubstituted isophthalates. …
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A leukotriene C₄ synthase inhibitor with the backbone of 5-(5-methylene-4-oxo-4,5-dihydrothiazol-2-ylamino) isophthalic acid

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Formation of organically modified octacalcium phosphate in solutions containing various amounts of benzenedicarboxylic acids

YOKOI Taishi,KAMITAKAHARA Masanobu,KAWASHITA Masakazu,OHTSUKI Chikara
Journal of the Ceramic Society of Japan 121(1410), 219-225, 2013
… We investigated formation of OCP with incorporated dicarboxylate ions, namely octacalcium phosphate carboxylate (OCPC), under synthetic conditions with various concentrations of benzenedicarboxylic acids (BDCAs) such as 1,2-benzenedicarboxylic acid (1,2BDCA, phthalic acid), 1,3-benzenedicarboxylic acid (1,3BDCA, isophthalic acid), and 1,4-benzenedicarboxylic acid (1,4BDCA, terephthalic acid). …
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「isophthalate」

Isophthalic acid
Names
	Other names Benzene-1,3-dicarboxylic acid; meta-Phthalic acid
Identifiers
CAS Registry Number	121-91-5
ChEBI	CHEBI:30802
ChemSpider	8182
	InChI InChI=1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12) ; Key: QQVIHTHCMHWDBS-UHFFFAOYSA-N ; InChI=1/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12); Key: QQVIHTHCMHWDBS-UHFFFAOYAY ;
Jmol-3D images	Image
PubChem	8496
	SMILES O=C(O)c1cccc(C(=O)O)c1 ;
Properties
Chemical formula	C6H4(COOH)2
Molar mass	166.14 g/mol
Appearance	White crystalline solid
Density	1.526 g/cm3, Solid
Solubility in water	Insoluble in water
Acidity (pKa)	3.46, 4.46
Hazards
EU classification	not listed
Related compounds
Related carboxylic acids	Benzoic acid; Phthalic acid (ortho); Terephthalic acid (para); Trimesic acid (benzene-1,3,5-tricarboxyllic acid)
	Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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	Infobox references