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| CAS No.: | 108-67-8 |
|---|---|
| Name: | Mesitylene |
| Article Data: | 397 |
| Cas Database | |
| Molecular Structure: | |
|
|
|
| Formula: | C9H12 |
| Molecular Weight: | 120.194 |
| Synonyms: | Mesitylene(8CI);1,3,5-Trimethylbenzene;2,4,6-Trimethylbenzene;3,5-Dimethyltoluene;NSC9273;sym-Trimethylbenzene; |
| EINECS: | 203-604-4 |
| Density: | 0.869 g/cm3 |
| Melting Point: | -45 °C |
| Boiling Point: | 166.7 °C at 760 mmHg |
| Flash Point: | 44.4 °C |
| Solubility: | 2.9 g/L (20 °C) in water |
| Appearance: | colorless liquid with a peculiar odor |
| Hazard Symbols: |
 Xi, N, F, T
|
| Risk Codes: | 10-37-51/53-39/23/24/25-23/24/25-11 |
| Safety: | 61-45-36/37-16-7 |
| Transport Information: | UN 2325 3/PG 3 |
| PSA: | 0.00000 |
| LogP: | 2.61180 |
(2,4,6-trimethylphenyl) phenyl sulfone
A
Benzenesulfinic acid
B
1,3,5-trimethyl-benzene
| Conditions | Yield |
|---|---|
| With lithium amalgam In N,N-dimethyl-formamide for 2h; Ambient temperature; | A 99% B 100% |
| Conditions | Yield |
|---|---|
| electrlysis, at 1.5 V, electrolyte: tetrabutylammonium perchlorate, in CH2Cl2; | A 100% B 166 % |
| In dichloromethane electrolysis, at 1.5 V; electrolyte: tetrabutylammonium perchlorate; | A 100% B 166 % |
morpholine
mesitylcopper(I)
A
C4H8NO(1-)*Cu(1+)
B
1,3,5-trimethyl-benzene
| Conditions | Yield |
|---|---|
| In tetrahydrofuran THF, ambient temp., excess of amine;; evapd. or filtered; elem. anal.;; | A n/a B 100% |
| Conditions | Yield |
|---|---|
| In tetrahydrofuran THF, ambient temp., excess of NH3;; evapd. or filtered; elem. anal.;; | A n/a B 100% |
2,4,6-trimethylphenyl(m-carboran-9-yl)iodonium tetrafluoroborate
sodium chloride
A
9-iodo-m-carborane
B
9-chloro-m-carborane
C
iodomesitylene
D
1,3,5-trimethyl-benzene
| Conditions | Yield |
|---|---|
| In chloroform; water mixt. of aryl(m-carboran-9-yl)iodonium tetrafluoroborate, NaF, water and chloroform was vigorously stirred under reflux at 56°C, 2.5 h; internal standard (chlorobenzene) added and org. layer was analysed by GLC; | A 0% B 100% C 100% D 0% |
| Conditions | Yield |
|---|---|
| With lithium amalgam In N,N-dimethyl-formamide; toluene Product distribution; Mechanism; further solvents; | A 85% B 99% |
| Conditions | Yield |
|---|---|
| With potassium fluoride In tetrahydrofuran; water at 80℃; for 8h; Time; Schlenk technique; Sealed tube; Inert atmosphere; | 99% |
| With [2-(di-tert-butylphosphinomethyl)-6-(diethylaminomethyl)pyridine]ruthenium(II) chlorocarbonyl hydride; isopropyl alcohol; sodium t-butanolate at 100℃; for 48h; Inert atmosphere; Sealed tube; Green chemistry; | 89% |
| With isopropyl alcohol at 20℃; for 24h; UV-irradiation; chemoselective reaction; | 88% |
mesitylcopper(I)
N-butylamine
A
copper(I) n-butylamide
B
1,3,5-trimethyl-benzene
| Conditions | Yield |
|---|---|
| In tetrahydrofuran THF, ambient temp., excess of amine;; evapd. or filtered; elem. anal.;; | A n/a B 98% |
dimesityl sulfone
A
2,4,6-trimethylbenzenesulphinic acid
B
1,3,5-trimethyl-benzene
| Conditions | Yield |
|---|---|
| With lithium amalgam In N,N-dimethyl-formamide for 2h; Ambient temperature; | A 92% B 97% |
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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.
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| guinea pig | LDLo | intraperitoneal | 1303mg/kg (1303mg/kg) | AMA Archives of Industrial Hygiene and Occupational Medicine. Vol. 9, Pg. 227, 1954. | |
| human | TCLo | inhalation | 10ppm (10ppm) | PERIPHERAL NERVE AND SENSATION: SENSORY CHANGE INVOLVING PERIPHERAL NERVE BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: STRUCTURAL OR FUNCTIONAL CHANGE IN TRACHEA OR BRONCHI | Zeitschrift fuer Unfallmedizin und Berufskrankheiten. Revue de Medecine des Accidents et des Maladies Professionelles. Vol. 49, Pg. 265, 1956. |
| rat | LC50 | inhalation | 24gm/m3/4H (24000mg/m3) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 44(5), Pg. 15, 1979. |
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.
