Mesitylene

Molecular structure of Mesitylene (CAS NO.108-67-8) is:

Product Name: Mesitylene
CAS Registry Number: 108-67-8
IUPAC Name: 1,3,5-trimethylbenzene
Molecular Weight: 120.19158 [g/mol]
Molecular Formula: C₉H₁₂
XLogP3: 3.4 
EINECS: 203-604-4
Melting Point: -45 °C
Water Solubility: 2.9 g/L (20 °C)
Surface Tension: 28.7 dyne/cm 
Refractive index: n20/D 1.499(lit.)
Density: 0.869 g/cm³
Flash Point: 44.4 °C
Enthalpy of Vaporization: 38.66 kJ/mol
Boiling Point: 166.7 °C at 760 mmHg
Vapour Pressure: 2.32 mmHg at 25°C 
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Product Categories: Benzene derivates;Analytical Chemistry;Standard Solution of Volatile Organic Compounds for Water & Soil Analysis;Standard Solutions (VOC)

 Mesitylene (CAS NO.108-67-8) is used in the production of trimesic acid and antioxygen, epoxy firming agent, polyester resin stabilizer, alkyd resin plasticizers and dye. It is commonly used as a solvent in research and industry. In the electronics industry,it has also been used as a developer for photopatternable silicones due to its solvent properties.

Poison by inhalation. Moderately toxic by intraperitoneal route. Human systemic effects by inhalation: sensory changes involving peripheral nerves, somnolence (general depressed activity), and structural or functional change in trachea or bronchi. Reports of leukopenia and thrombocytopenia in experimental animals. A mild skin and eye irritant. A flammable liquid when exposed to heat or flame; can react vigorously with oxidizing materials. Violent reaction with HNO₃. To fight fire, use water spray, fog, foam, CO₂. Emitted from modern building materials ( CENEAR    Chemical and Engineering News. 69 (1991),22. ). When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes: Xi,N,F,T
Risk Statements: 10-37-51/53-39/23/24/25-23/24/25-11
10:  Flammable 
37:  Irritating to the respiratory system 
51/53:  Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment 
39/23/24/25:  Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed
23/24/25:  Toxic by inhalation, in contact with skin and if swallowed 
11:  Highly Flammable  
Safety Statements: 61-45-36/37-16-7
61:  Avoid release to the environment. Refer to special instructions safety data sheet 
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
36/37:  Wear suitable protective clothing and gloves 
16:  Keep away from sources of ignition - No smoking 
7:  Keep container tightly closed  
RIDADR: UN 2325 3/PG 3
WGK Germany: 2
RTECS: OX6825000
F: 10: Keep under argon.
Hazard Note: Irritant/Flammable
HazardClass: 3
PackingGroup: III
HS Code: 29029080

OSHA PEL: TWA 25 ppm
ACGIH TLV: TWA 25 ppm
DFG MAK: 20 ppm
DOT Classification:  3; Label: Flammable Liquid

 Mesitylene (CAS NO.108-67-8) is prepared by distillation of acetone with sulfuric acid or by trimerization of propyne in sulfuric acid, which, in both cases, acts as a catalyst and dehydrating agent.

 Mesitylene , its cas register number is 108-67-8. It also can be called 1,3,5-Trimethylbenzene ; 3,5-Dimethyltoluene ; Benzene, 1,3,5-trimethyl- ; Fleet-X ; Trimethylbenzol ; sym-Trimethylbenzene .It is a colorless liquid with a peculiar odor. It insoluble in water and less dense than water. It may be toxic by ingestion and inhalation.