Isophthalic acid 1592061 220523506 2008-06-20T07:47:53Z Puppy8800 5404759 iw {{Chembox new | Name = Isophthalic acid | ImageFile = Isophthalic-acid-2D-skeletal.png <!-- | ImageSize = 200px --> | ImageName = Isophthalic acid | OtherNames = Benzene-1,3-dicarboxylic acid<br />''meta''-Phthalic acid | Section1 = {{Chembox Identifiers | SMILES = C1=CC(=CC(=C1)C(=O)O)C(=O)O | CASNo = 121-91-5 }} | Section2 = {{Chembox Properties | Formula = C<sub>6</sub>H<sub>4</sub>(COOH)<sub>2</sub> | MolarMass = 166.14 g/mol | Appearance = White crystalline solid | Density = 1.526 g/cm<sup>3</sup>, Solid | Solubility = Insoluble in water | BoilingPt = }} | Section3 = {{Chembox Structure | CrystalStruct = | Dipole = }} | Section7 = {{Chembox Hazards | ExternalMSDS = | EUClass = not listed | FlashPt = }} | Section8 = {{Chembox Related | Function = [[carboxylic acid]]s | OtherFunctn = [[Phthalic acid]]<br />[[Terephthalic acid]]<br />[[Benzoic acid]] | OtherCpds = }} }} '''Isophthalic acid''', or '''benzene-1,3-dicarboxylic acid''', is an [[Aromaticity|aromatic]] [[dicarboxylic acid]], with formula C<sub>6</sub>H<sub>4</sub>(COOH)<sub>2</sub>. It is an isomer of [[phthalic acid]] and [[terephthalic acid]]. Isophthalic acid can be obtained by oxidizing meta-[[xylene]] with [[chromic acid]], or by fusing potassium meta-sulphobenzoate, or meta-brombenzoate with potassium formate (terephthalic acid is also formed in the last case). It melts above 300°. The barium salt (6H<sub>2</sub>O) 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== {{Unreferenced|date =September 2007}} <references/> ==External links== *[http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc05/icsc0500.htm International Chemical Safety Card 0500] [[Category:Dicarboxylic acids]] [[Category:Monomers]] [[Category:Benzoic acids]] {{aromatic-stub}} [[de:Isophthalsäure]] [[fr:Acide isophtalique]] [[ja:イソフタル酸]] [[pt:Ácido isoftálico]] [[fi:Isoftaalihappo]] [[zh:间苯二甲酸]]