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)
	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.