Editing Propylene oxide (section)

{{chembox
|Verifiedfields = changed
|Watchedfields = changed
|verifiedrevid = 413113516
|ImageFile = Propylene oxide.svg
|ImageSize = 165
|ImageName = Structural formula
|ImageFile1 = (S)-Propylene oxide molecule ball.png
|ImageSize1 = 165
|ImageName1 = Ball-and-stick model of the propylene oxide molecule
|PIN = (2R)-2-Methyloxirane<br>(2S)-2-Methyloxirane
|OtherNames = Propylene oxide<br />Epoxypropane<br />Propylene epoxide<br />1,2-Propylene oxide<br />Methyl oxirane<br />1,2-Epoxypropane<br />Propene oxide<br />Methyl ethylene oxide<br />Methylethylene oxide
|Section1={{Chembox Identifiers
|CASNo = 75-56-9
|CASNo_Ref = {{cascite|correct|CAS}}
|UNII_Ref = {{fdacite|correct|FDA}}
|UNII = Y4Y7NYD4BK
|EINECS = 200-879-2
|SMILES = CC1CO1
|PubChem = 6378
|ChemSpiderID = 6138
|StdInChI = 1S/C3H6O/c1-3-2-4-3/h3H,2H2,1H3
|StdInChIKey = GOOHAUXETOMSMM-UHFFFAOYSA-N
|ChEBI_Ref = {{ebicite|changed|EBI}}
|ChEBI = 38685
|KEGG_Ref = {{keggcite|changed|kegg}}
|KEGG = C15508
}}
|Section2={{Chembox Properties
|C=3 | H=6 | O=1
|Appearance = Colourless liquid
|Odor = benzene-like<ref name=PGCH/>
|Density = 0.859 g/cm<sup>3</sup><ref name=b92/>
|MeltingPtC = −111.9
|MeltingPt_ref =<ref name=b92/>
|BoilingPtC = 35
|BoilingPt_ref = <ref name=b92>{{harvnb | Haynes | 2011 | p=3.384}}</ref>
|Solubility = 41% (20&nbsp;°C)<ref name=PGCH/>
|VaporPressure = 445 mmHg (20&nbsp;°C)<ref name=PGCH/>
|RefractIndex = 1.3660<ref name=b92/>
|MagSus = {{val|-4.25e-5|u=cm<sup>3</sup>/mol}}<ref>{{harvnb | Haynes | 2011 | p=3.577}}</ref>
}}
|Section3={{Chembox Thermochemistry
|DeltaHf = −123.0{{nbsp}}kJ·mol<sup>−1</sup><ref name=b92b>{{harvnb | Haynes | 2011 | p=5.24}}</ref>
|Entropy = 196.5{{nbsp}}J·(K·mol)<sup>−1</sup>
|HeatCapacity = 120.4{{nbsp}}J·(K·mol)<sup>−1</sup>
}}
|Section4={{Chembox Hazards
|GHSPictograms = {{GHS02}}{{GHS08}}{{GHS07}}
|GHSSignalWord = DANGER
|MainHazards = Extremely flammable<ref>[http://www.otrain.com/OTI_MSDS(NFPA)PMAP.html "NFPA DIAMOND"]. ''www.otrain.com''.</ref><ref>GOV, NOAA Office of Response and Restoration, US. [http://cameochemicals.noaa.gov/chemical/5159 "PROPYLENE OXIDE | CAMEO Chemicals | NOAA"]. ''cameochemicals.noaa.gov''.</ref>
|NFPA-H = 3
|NFPA-F = 4
|NFPA-R = 2
|FlashPtC = −37
|AutoignitionPtC = 747
|ExploLimits = 2.3–36%<ref name=PGCH/>
|PEL = TWA 100 ppm (240 mg/m<sup>3</sup>)<ref name=PGCH>{{PGCH|0538}}</ref>
|IDLH = Ca [400 ppm]<ref name=PGCH/>
|REL = Ca<ref name=PGCH/>
|LC50 = 1740 ppm (mouse, 4 h)<br/>4000 ppm (rat, 4 h)<ref name=IDLH>{{IDLH|75569|Propylene oxide}}</ref>
|LD50 = 660 mg/kg (guinea pig, oral)<br/>380 mg/kg (rat, oral)<br/>440 mg/kg (mouse, oral)<br/>1140 mg/kg (rat, oral)<br/>690 mg/kg (guinea pig, oral)<ref name=IDLH/>
|LCLo = 2005 ppm (dog, 4 h)<br/>4000 ppm (guinea pig, 4 h)<ref name=IDLH/>
}}
}}

'''Propylene oxide''' is an [[epoxide]] with the molecular formula C<sub>3</sub>H<sub>6</sub>O. This colourless [[volatility (chemistry)|volatile]] liquid with an odour similar to [[ether]], is produced on a large scale industrially. Its major application is its use for the production of [[Polyol#Polyols in polymer chemistry|polyether polyols]] for use in making [[polyurethane]] plastics. It is a [[Chirality (chemistry)|chiral]] [[epoxide]], although it is commonly used as a [[racemic mixture]].

This compound is sometimes called '''1,2-propylene oxide''' to distinguish it from its [[isomer]] 1,3-propylene oxide, better known as [[oxetane]].