1,2,4-Trimethylbenzene
1,2,4-Trimethylbenzene
CAS: 95-63-6
Molecular Formula: C9H12
1,2,4-Trimethylbenzene - Names and Identifiers
| 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) |
| CAS | 95-63-6 |
| EINECS | 202-436-9 |
| InChI | InChI=1/C9H12/c1-7-4-5-8(2)9(3)6-7/h4-6H,1-3H3 |
| InChIKey | GWHJZXXIDMPWGX-UHFFFAOYSA-N |
1,2,4-Trimethylbenzene - Physico-chemical Properties
| 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 |
1,2,4-Trimethylbenzene - Risk and Safety
| 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) |
1,2,4-Trimethylbenzene - Nature
Open Data Verified Data
colorless liquid. Insoluble in water, soluble in ethanol, ether and benzene. Melting Point -44 °c. Boiling point 168 °c. Relative density (Hu o)0.8758. Refractive index 5048. Flash point 48 °c. The combustion heat was 5206 KJ.
Last Update：2024-01-02 23:10:35
1,2,4-Trimethylbenzene - Preparation Method
Open Data Verified Data
obtained by separation from c9-clo aromatics obtained from catalytic reforming and naphtha cracking. The content of meta-trimethylbenzene in reforming aromatics is more than 40%. More than 99% pure product can be obtained by distillation.
Last Update：2022-01-01 10:39:20
1,2,4-Trimethylbenzene - Use
Open Data Verified Data
This product is the basic organic chemical raw materials, can be used in the production of Medicine (vitamin E), dyes and synthetic resin. It can also produce trimellitic anhydride, pyromellitic dianhydride, water-soluble alkyd resin, unsaturated polyester resin and plasticizer, epoxy resin curing agent and surfactant.
Last Update：2022-01-01 10:39:20
1,2,4-Trimethylbenzene - Safety
Open Data Verified Data
- This product is toxic, stimulating mucosa and central nervous system, causing central nervous system disorder, skin hemorrhagic anemia, tracheitis, pulmonary edema, etc. Mice were intraperitoneally injected with LD50 2mL/kg. This product is flammable and explosive, and it is loaded into the oil tank, oil tank, or iron drum and other containers that meet the requirements after inspection. When the product is injected into the container, the safety space of the product should be reserved according to the change of temperature, and the expansion of the product should be considered.
- pyrotechnic shall be strictly prohibited during the storage and transportation, and relevant fire safety regulations shall be implemented. At the same time, perfect fire fighting equipment shall be provided.
Last Update：2022-01-01 10:39:21
1,2,4-Trimethylbenzene - Reference Information
| olfactory Threshold | 0.12ppm |
| Henry's Law Constant | 6.946, 11.202, and 15.702 at 27.0, 35.0, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | for the production of PVC plastic plasticizer trioctyl trimellitate, powder coating, motor heat-resistant insulation paint, such as This product is the basic organic chemical raw materials, can be used in the production of Medicine (vitamin E), dyes and synthetic resin. It can also produce trimellitic anhydride, pyromellitic dianhydride, water-soluble alkyd resin, unsaturated polyester resin, plasticizer, epoxy resin curing agent and surfactant. used in the production of medicines (vitamin E), dyes, synthetic resins and hydrogen peroxide. |
| production method | C9-C10 aromatics obtained from catalytic reforming or naphtha cracking all contain mixed trimethylbenzene, such as 1,2, 4-trimethylbenzene. In the case of reforming aromatics, the content of 1,2, 4-trimethylbenzene is as high as 40% or more. Products with a purity of more than 99% can be obtained by distillation. For example, two floating valve columns (200 layers in total) are used to separate 1,2, 4-trimethylbenzene from reformed aromatics, the purity was 95-97% and the yield was 58-78%. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 5000 mg/kg |
| flammability hazard characteristics | flammable in open flame, high temperature, strong oxidant; combustion emissions |
| storage and transportation characteristics | The package is complete, light and light unloading; The warehouse is ventilated, away from open flame, high temperature, separate from oxidant |
| fire extinguishing agent | foam, dry powder, carbon dioxide, sand |
| Occupational Standard | TLV-TWA 25 PPM |
| spontaneous combustion temperature | 959 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-06-11 12:54:21
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