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| Product Name: | 1,2,3,4-Tetramethylbenzene | | Synonyms: | 1,2,3,4-tetramethyl-benzen;LABOTEST-BB LT00852111;DUROL;1,2,3,4-TETRAMETHYLBENZENE;Prehenitene;1,2,3,4-Tetramethylbenzene,tech.90%;Benzene, 1,2,3,4-tetramethyl-;TETRAMETHYLBENZENEISOMERS | | CAS: | 488-23-3 | | MF: | C10H14 | | MW: | 134.22 | | EINECS: | 207-673-1 | | Product Categories: | | | Mol File: | 488-23-3.mol |  |
| | 1,2,3,4-Tetramethylbenzene Chemical Properties |
| Melting point | 76-80 °C(lit.) | | Boiling point | 203°C | | density | 0.838 g/mL at 25 °C(lit.) | | vapor density | 4.6 (vs air) | | vapor pressure | 160 mm Hg ( 140 °C) | | refractive index | 1.5190 | | Fp | 165 °F | | storage temp. | Sealed in dry,Room Temperature | | solubility | Chloroform (Slightly), Ethyl Acetate (Slightly) | | form | Oil | | color | Colourless | | Odor Threshold | 0.011ppm | | Water Solubility | Immiscible with water. | | BRN | 1904390 | | LogP | 4.000 | | CAS DataBase Reference | 488-23-3(CAS DataBase Reference) | | NIST Chemistry Reference | Benzene, 1,2,3,4-tetramethyl-(488-23-3) | | EPA Substance Registry System | 1,2,3,4-Tetramethylbenzene (488-23-3) |
| Hazard Codes | F | | Risk Statements | 11 | | Safety Statements | 26-37 | | RIDADR | UN 1325 4.1/PG 2 | | WGK Germany | 1 | | RTECS | DC0500000 | | TSCA | Yes | | HazardClass | 3 | | PackingGroup | Ⅱ |
| | 1,2,3,4-Tetramethylbenzene Usage And Synthesis |
| Description | 1, 2, 3, 4-Tetramethylbenzene is used as a starting material in the preparation of 1, 2, 3, 4-tetramethyl benzene-5-chlorosulfonyl chloride by reacting with chlorosulfonic acid1. In industry, it is the precursor to pyromellitic dianhydride, which is used for manufacturing curing agents, adhesives, coating materials. It is used in the manufacture of some raw materials for engineering plastics (polyimides) and cross-linking agent for alkyd resins. It is also a suitable starting material for the synthesis of hexamethylbenzene2-4.
| | Reference |
- https://www.alfa.com/en/catalog/L19756/
- Hoefs, Marcel J. L., et al. "Alternative biological sources for 1,2,3,4-tetramethylbenzene in flash pyrolysates of kerogen." Organic Geochemistry 23.10(1995): 975-979.
- Sun, Yongge, et al. "Source facies of the Paleozoic petroleum systems in the Tabei uplift, Tarim Basin, NW China: implications from aryl isoprenoids in crude oils." Organic Geochemistry 34.4(2003): 629-634.
- Jia, Wanglu, et al. "Source of 1,2,3,4-tetramethylbenzene in asphaltenes from the Tarim Basin." Journal of Asian Earth Sciences 30.5(2007):591-598.
| | Chemical Properties | Colorless liquid. Soluble in alcohol; insoluble in water.
| | Uses | 1,2,3,4-Tetramethylbenzene is a useful starting material and building block for organic synthesis. An analyte identified in the volatile oils from Taxodium ascendens leaves and cones. Antibacterial activity. | | Definition | ChEBI: A tetramethylbenzene that consists of benzene substituted by methyl groups at positions 1, 2, 3 and 4. | | Purification Methods | Dry it over sodium and distil under reduced pressure. The picrate has m 92-95o (EtOH). [Beilstein 5 H 430, 5 I 206. 5 II 329, 5 III 974, 5 IV 1072.] |
| | 1,2,3,4-Tetramethylbenzene Preparation Products And Raw materials |
| Raw materials | Benzene, 2-ethyl-1,3,5-trimethyl--->benzene-1,2,3,4-tetracarboxylic acid-->1,3-Isobenzofurandione,4,7-dimethyl--->2,3,5,6-TETRAMETHYLACETOPHENONE-->1,2,3,5-TETRAMETHYLBENZENE | | Preparation Products | 2-DI-TERT-BUTYLPHOSPHINO-3,4,5,6-TETRAM&-->1,2-DI(CHLOROMETHYL)-3,4,5,6-TETRAMETHYLBENZENE |
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