Mesitylene

Mesitylene
Mesitylene	Mesitylene
Names
	Preferred IUPAC name 1,3,5-Trimethylbenzene
	Other names Mesitylene; sym-Trimethylbenzene
Identifiers
CAS Number	108-67-8 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:34833 ;
ChemSpider	7659 ;
ECHA InfoCard	100.003.278
EC Number	203-604-4;
KEGG	C14508 ;
PubChem CID	7947;
UNII	887L18KQ6X ;
UN number	2325
CompTox Dashboard (EPA)	DTXSID6026797 ;
	InChI InChI=1S/C9H12/c1-7-4-8(2)6-9(3)5-7/h4-6H,1-3H3 Key: AUHZEENZYGFFBQ-UHFFFAOYSA-N ; InChI=1/C9H12/c1-7-4-8(2)6-9(3)5-7/h4-6H,1-3H3 Key: AUHZEENZYGFFBQ-UHFFFAOYAK;
	SMILES Cc1cc(cc(c1)C)C;
Properties
Chemical formula	C9H12
Molar mass	120.19 g/mol
Appearance	Colorless liquid
Odor	Distinctive, aromatic
Density	0.8637 g/cm3 at 20 °C
Melting point	−44.8 °C (−48.6 °F; 228.3 K)
Boiling point	164.7 °C (328.5 °F; 437.8 K)
Solubility in water	0.002% (20°C)
Vapor pressure	2 mmHg (20°C)
Magnetic susceptibility (χ)	-92.32·10−6 cm3/mol
Structure
Dipole moment	0.047 D
Hazards
Flash point	50 °C; 122 °F; 323 K
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 25 ppm (125 mg/m3)
IDLH (Immediate danger)	N.D.
Safety data sheet (SDS)	[1]
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Mesitylene or 1,3,5-trimethylbenzene is a derivative of benzene with three methyl substituents positioned symmetrically around the ring. The other two isomeric trimethylbenzenes are 1,2,4-trimethylbenzene (pseudocumene) and 1,2,3-trimethylbenzene (hemimellitene). All three compounds have the formula C₆H₃(CH₃)₃, which is commonly abbreviated C₆H₃Me₃. Mesitylene is a colorless liquid with sweet aromatic odor. It is a component of coal tar, which is its traditional source. It is a precursor to diverse fine chemicals. The mesityl group (Mes) is a substituent with the formula C₆H₂Me₃ and is found in various other compounds.^[4]

^ ^a ^b Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 139. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
^ ^a ^b ^c ^d ^e ^f ^g ^h NIOSH Pocket Guide to Chemical Hazards. "#0639". National Institute for Occupational Safety and Health (NIOSH).
^ Zhao, Jun; Zhang, Renyi (2004). "Proton transfer reaction rate constants between hydronium ion (H₃O⁺) and volatile organic compounds". Atmospheric Environment. 38 (14): 2177–2185. Bibcode:2004AtmEn..38.2177Z. doi:10.1016/j.atmosenv.2004.01.019.
^ Cite error: The named reference Ullmanns was invoked but never defined (see the help page).

[iupac2013-1] Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 139. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.

[PGCH-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h NIOSH Pocket Guide to Chemical Hazards. "#0639". National Institute for Occupational Safety and Health (NIOSH).

[3] Zhao, Jun; Zhang, Renyi (2004). "Proton transfer reaction rate constants between hydronium ion (H₃O⁺) and volatile organic compounds". Atmospheric Environment. 38 (14): 2177–2185. Bibcode:2004AtmEn..38.2177Z. doi:10.1016/j.atmosenv.2004.01.019.

[Ullmanns-4] Cite error: The named reference Ullmanns was invoked but never defined (see the help page).

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