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]]