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Metatrimethylbenzene and homotrimethylbenzene are produced by distillation of C9 aromatics as raw materials. Metatrimethylbenzene is mainly used as a raw material for the production of trimellitic anhydride, dyestuffs, epoxy resin curing agents, surfactants, and pharmaceuticals, etc. It can also be used as an extractant for the production of hydrogen peroxide.
Homotrimethylbenzene is used as raw material for the production of homotrimethylbenzene, antioxidant, curing agent of epoxy resin, stabilizer of polyester resin, plasticizer of alkyd resin, and 2.4.6-trimethylaniline.
| Name | 1,2,4-Trimethylbenzene |
| Synonyms | PSI-CUMENE PSEUDOCUMOL PSEUDOCUMENE Pseudocumene TRIMETHYLBENZENE 1,2,4-Trimethylbenzere 1,3,4-TRIMETHYLBENZENE 1,2,4-trimethyl-benzen 1,2,4-Trimethylbenzene 1,2,4-TRIMETHYLBENZENE 1,2,4-trimethylbenzene (pseudocumene) |
| Molecular Formula | C9H12 |
| Molar Mass | 120.19 |
| Density | 0.876 g/mL at 20 °C(lit.) |
| Melting Point | -44 °C |
| Boling Point | 168°C(lit.) |
| Flash Point | 120°F |
| Water Solubility | Soluble in alcohol, benzene and ether. Slightly soluble in water |
| Solubility | 0.057g/l |
| Vapor Presure | 4.5 mm Hg ( 37.7 °C) |
| Vapor Density | 4.1 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless |
| Exposure Limit | NIOSH REL: TWA 25 ppm (125 mg/m3); ACGIH TLV: TWA for mixedisomers 25 ppm (adopted). |
| Merck | 14,7915 |
| BRN | 1903005 |
| pKa | >14 (Schwarzenbach et al., 1993) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents. Flammable. May form explosive mixtures with air. |
| Explosive Limit | 0.8-7%(V) |
| Refractive Index | n20/D 1.504(lit.) |
| Physical and Chemical Properties | Character: colorless transparent liquid. melting point -43.8 ℃ boiling point 169.4 ℃ relative density 0.8758 refractive index 1.5048 flash point 48 ℃ solubility insoluble in water, soluble in ethanol, ether and benzene. |
| Use | Used in the production of PVC plastic plasticizer trioctyl trimethylene, powder coating, motor temperature resistant insulating paint |
| Risk Codes | R10 – Flammable R20 – Harmful by inhalation R36/37/38 – Irritating to eyes, respiratory system and skin. R51/53 – Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R39/23/24/25 – R23/24/25 – Toxic by inhalation, in contact with skin and if swallowed. R11 – Highly Flammable R65 – Harmful: May cause lung damage if swallowed |
| Safety Description | S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S61 – Avoid release to the environment. Refer to special instructions / safety data sheets. S45 – In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 – Wear suitable protective clothing and gloves. S16 – Keep away from sources of ignition. S7 – Keep container tightly closed. S62 – If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN 3295 3/PG 3 |
| WGK Germany | 2 |
| RTECS | DC3325000 |
| TSCA | Yes |
| HS Code | 29029090 |
| Hazard Note | Irritant/Flammable |
| Hazard Class | 3 |
| Packing Group | III |
| Toxicity | LD50 i.p. in male, female mice (mg/kg): 5000, 4100 (Janik-Spiechowicz) |
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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