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| CAS No.: | 488-23-3 |
|---|---|
| Name: | 1,2,3,4-Tetramethylbenzene |
| Article Data: | 88 |
| Molecular Structure: | |
|
|
|
| Formula: | C10H14 |
| Molecular Weight: | 134.221 |
| Synonyms: | 1,2,3,4-Tetramethylbenzene;NSC 93932; Prehnitene; Prehnitol |
| EINECS: | 207-673-1 |
| Density: | 0.838 g/mL at 25 °C(lit.) |
| Melting Point: | 76-80 °C(lit.) |
| Boiling Point: | 204 °C at 760 mmHg |
| Flash Point: | 69.7 °C |
| Solubility: | Immiscible with water. |
| Hazard Symbols: |
 F
|
| Risk Codes: | R11 |
| Safety: | S26-S37 |
| Transport Information: | UN 1325 4 |
| PSA: | 0.00000 |
| LogP: | 2.92020 |
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1,2-bis(bromomethyl)-3,6-dimethylbenzene
- 488-23-3
1,2,3,4-Tetramethylbenzene
| Conditions | Yield |
|---|---|
| With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 5℃; Temperature; Reagent/catalyst; Inert atmosphere; Reflux; | 97.3% |
| With tetrahydrofuran; lithium aluminium tetrahydride |
- 95-93-2
1,2,4,5-tetramethylbenzene
- 75-36-5
acetyl chloride
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 527-53-7
1,2,3,5-Tetramethylbenzene
C
- 2142-79-2
2,3,5,6-tetramethylacetophenone
| Conditions | Yield |
|---|---|
| With aluminium trichloride In tetrachloromethane 1.) 5 deg C, 1 h; 2.) 25 deg C, 1 h; | A 2.3% B 0.1% C 94.6% |
- 527-53-7
1,2,3,5-Tetramethylbenzene
- 108-24-7
acetic anhydride
A
- 95-93-2
1,2,4,5-tetramethylbenzene
B
- 488-23-3
1,2,3,4-Tetramethylbenzene
C
- 2142-78-1
1-(2,3,4,6-tetramethyl-phenyl)-ethanone
D
- 2142-79-2
2,3,5,6-tetramethylacetophenone
| Conditions | Yield |
|---|---|
| With aluminium trichloride In carbon disulfide at 50℃; for 0.5h; Further byproducts given; | A 1.8% B 1.9% C 92.8% D 2.2% |
- 95-93-2
1,2,4,5-tetramethylbenzene
- 108-24-7
acetic anhydride
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 2142-79-2
2,3,5,6-tetramethylacetophenone
C
- 15517-58-5
1,1′-(2,3,5,6-tetramethyl-1,4-phenylene)bis(ethan-1-one)
| Conditions | Yield |
|---|---|
| aluminium trichloride In carbon disulfide 1.) 25 deg C, 1 h; 2.) 50 deg C, 3 h; | A 2.9% B 69.6% C 27.5% |
| Conditions | Yield |
|---|---|
| Stage #1: Cp2TiCl2 With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 1h; Stage #2: dimethylacetylene In tetrahydrofuran; hexane at -10℃; for 3h; Stage #3: With propyl cyanide In tetrahydrofuran; hexane at 50℃; for 1h; | 53% |
- 18611-39-7
1,2-Diisopropyliden-3,4-dichlor-cyclobutan
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 1124-20-5
2-(3-methylphenyl)propene
C
- 76886-19-6
1-chloro-2-isopropyl-6-methylbenzene
| Conditions | Yield |
|---|---|
| at 250℃; for 2.5h; | A 51% B 11% C 30% |
- 18611-37-5
4-Chlor-2-chlormethylen-3-isopropyliden-1,1-dimethyl-cyclobutan
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 18611-39-7
1,2-Diisopropyliden-3,4-dichlor-cyclobutan
C
- 76886-19-6
1-chloro-2-isopropyl-6-methylbenzene
| Conditions | Yield |
|---|---|
| at 300℃; for 2.5h; Mechanism; pyrolysis of halogen derivatives of dimethylenecyclobutane and methylenecyclobutene investigated; | A 48% B n/a C 2% |
- 18611-37-5
4-Chlor-2-chlormethylen-3-isopropyliden-1,1-dimethyl-cyclobutan
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 1124-20-5
2-(3-methylphenyl)propene
C
- 76886-19-6
1-chloro-2-isopropyl-6-methylbenzene
| Conditions | Yield |
|---|---|
| at 300℃; for 2.5h; | A 48% B 28% C 2% |
- 115-10-6
Dimethyl ether
- 106-42-3
para-xylene
A
- 488-23-3
1,2,3,4-Tetramethylbenzene
B
- 700-12-9
pentamethylbenzene,
C
- 87-85-4
Hexamethylbenzene
| Conditions | Yield |
|---|---|
| at 450℃; Leiten ueber Aluminiumoxyd-Siliciumdioxyd-Kontakte; |
- 95-93-2
1,2,4,5-tetramethylbenzene
- 527-53-7
1,2,3,5-Tetramethylbenzene
- 488-23-3
1,2,3,4-Tetramethylbenzene
| Conditions | Yield |
|---|---|
| With sulfuric acid at 85℃; Erhitzen der gebildeten 1.2.3.4-Tetramethyl-benzol-sulfonsaeure-(5) mit wss. H2SO4 auf 145grad; |
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Chemistry
Molecular Formula of 1,2,3,4-Tetramethylbenzene (CAS NO.488-23-3): C10H14
Molecular Weight: 134.22 g/mol
EINECS: 202-465-7
Flashing point: 69.7 °C
Index of Refraction: 1.5190
Density: 0.838 g/mL at 25 °C(lit.)
Boiling Point: 0.838 g/mL at 25 °C(lit.)
Melting point: 76-80 °C(lit.)
Structure of 1,2,3,4-Tetramethylbenzene (CAS NO.488-23-3):
IUPAC Name: 1,2,3,4-Tetramethylbenzene
Toxicity Data With Reference
| 1. | skn-rbt 100 mg/24H MLD | DCTODJ Drug and Chemical Toxicology. 1 (1978),219. | ||
| 2. | orl-rat LD50:6408 mg/kg | DCTODJ Drug and Chemical Toxicology. 1 (1978),219. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Mildly toxic by ingestion. A skin irritant. A flammable material. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes of 1,2,3,4-Tetramethylbenzene (CAS NO.488-23-3): .gif){kind=small}
F
Risk Statements:
R11:Highly flammable.
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37:Wear suitable gloves.
RIDADR UN 1325 4.1/PG 2
WGK Germany 1
RTECS DC0500000
Specification
1,2,3,4-Tetramethylbenzene , its cas register number is 488-23-3. It also can be called Prehnitene ; and Benzene, 1,2,3,4-tetramethyl- .