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Propylene glycol-Wikipedia,twx free encyclopedia Page I of 5 <br /> Propylene glycol <br /> From Wikipedia,the free encyclopedia <br /> ._.-._... Propylene glycollll--- ----- <br /> Propylene glycol,known also by the systematic name <br /> propane-1,2-diol, is an organic compound (a diol alcohol), i <br /> usually a faintly sweet, and colorless clear viscous liquid that u O <br /> is hygroscopic and miscible with water, acetone,and H <br /> chloroform. 100�y <br /> Contents H <br /> ■ 1 Chirality <br /> a 2 Production <br /> r 3 Applications <br /> ■ 4 Safety <br /> ■ 4.1 Potential health effects; IUPAC name <br /> r 4.2 Allergic reaction I propane-1,2-diol <br /> r 4.3 Possible air germicide t I propylene glycol, 1,2- <br /> propanediol, 1,2- <br /> 5 References Dihydroxypropane, <br /> ■ 6 See also Other names methyl ethyl glycol f <br /> ■ 7 External links (MEG), <br /> I methylethylene glycol, <br /> Chiralityi PG,Sirlene,Dowfrost <br /> Identifiers <br /> PropyleneCAS number [57-S5-6J <br /> glycol contains an asymmetrical carbon atom,so it RTHCS number 57-55-6] 0 —� <br /> exists in two stereoisomers. The commercial product is a <br /> racemic mixture. Pure optical isomers can be obtained by ATCvet code QA.16 A01 <br /> hydration of optically pure propylene oxide.L�1 SMILES <br /> cc(0)co <br /> Production ChemSpider ID 11003 <br /> >Pro erties <br /> Molecular C.H O <br /> Industrially propylene glycol is produced by propylene oxide formula ' 8 2 ' <br /> E <br /> hydration_[31 Different manufacturers use either non-catalytic Molar mass 76.09 glmol <br /> high-temperature process at 200°C (392 °F)to 220°C (4028 ° Density1.036 g/cru' <br /> F), or a catalytic method,which proceeds at ISO C (302 F')to <br /> 180°C (356°F) in the presence of ion exchange resin or a Melting point -59 OC <br /> small amount of sulfuric acid or alkali. <br /> Boiling point <br /> Final products contain 20% 1,2-propanediol, 1.5% of 188.2°C <br /> Solubility in <br /> dipropylene glycol and small amount of other polypropylene water fully miscible <br /> glycoL[41 Propylene glycol can also be converted front <br /> glycerol,a biodiesel byproduct. (Solubility in fully miscible <br /> ethanol <br /> Solubility in fully miscible <br /> Applications diel ether <br /> http_//en.wikipedia.org/wiki/Propylene glycol 8/7/2009 <br />