1,2,3-Trimethylbenzene
1,2,3-Trimethylbenzene
CAS: 526-73-8
Molecular Formula: C9H12
1,2,3-Trimethylbenzene - Names and Identifiers
| Name | 1,2,3-Trimethylbenzene |
| Synonyms | HEMELLITOL hemimellitol HEMIMELLITINE HEMIMELLITENE hemimellitene 1,2,3-TRIMETHYLBENZENE 1,2,3-Trimethylbenzene benzene,1,2,3-trimethyl- 1,2,3-TRIMETHYLBENZENE OEKANAL, 250 MG |
| CAS | 526-73-8 |
| EINECS | 208-394-8 |
| InChI | InChI=1/C9H12/c1-7-5-4-6-8(2)9(7)3/h4-6H,1-3H3 |
1,2,3-Trimethylbenzene - Physico-chemical Properties
| Molecular Formula | C9H12 |
| Molar Mass | 120.19 |
| Density | 0.894g/mLat 25°C(lit.) |
| Melting Point | −25°C(lit.) |
| Boling Point | 175-176°C(lit.) |
| Flash Point | 119°F |
| Water Solubility | 65.51mg/L(25 ºC) |
| Solubility | Soluble in acetone, alcohol, benzene, and ether (Weast, 1986) |
| Vapor Presure | 3.4 mm Hg ( 37.7 °C) |
| Vapor Density | 4.15 (vs air) |
| Appearance | neat |
| Color | Colorless to Light yellow |
| Exposure Limit | NIOSH REL: TWA 25 ppm (125 mg/m3); ACGIH TLV: TWA for mixedisomers 25 ppm (adopted). |
| BRN | 1903410 |
| pKa | >14 (Schwarzenbach et al., 1993) |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents. |
| Refractive Index | n20/D 1.513(lit.) |
| Physical and Chemical Properties | Character: colorless transparent liquid. melting point -25.4 ℃ boiling point 176.1 ℃ relative density 0.8944 refractive index 1.5139 flash point 48 ℃ solubility, benzene, acetone and other organic solvents. |
| Use | For the preparation of aniline dyes, alkyd resins, polyester resins and benzenetricarboxylic acid |
1,2,3-Trimethylbenzene - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R10 - Flammable R37 - Irritating to the respiratory system R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 3295 3/PG 3 |
| WGK Germany | 3 |
| RTECS | DC3300000 |
| Hazard Class | 3.2 |
| Packing Group | III |
1,2,3-Trimethylbenzene - Nature
Open Data Verified Data
colorless transparent liquid, melting point -25.4 ℃, boiling point 175~176 ℃. The relative density was 0.8944. Refractive index 5149. Flash point 48 °c. Soluble in alcohol, ether, benzene, acetone and other organic solvents.
Last Update：2024-01-02 23:10:35
1,2,3-Trimethylbenzene - Preparation Method
Open Data Verified Data
both Petroleum aromatics and coal tar aromatics obtained from catalytic reforming or petroleum cracking contain a certain amount of trimethylbenzene. About 88.7% of the trimethylbenzene is contained in the reformed aromatic hydrocarbon. After rectification, acid washing, and then distillation to obtain the finished product.
Last Update：2022-01-01 10:39:18
1,2,3-Trimethylbenzene - Use
Open Data Verified Data
for the production of aniline dyes, alkyd resins, polyester resins and benzenetricarboxylic acid.
Last Update：2022-01-01 10:39:18
1,2,3-Trimethylbenzene - Safety
Open Data Verified Data
- This product has a stimulating effect on eyes, skin and mucous membranes. Rat oral LD50 5000mg/kg. Masks and gloves should be worn during operation. Flammable, in case of open flame, high temperature, or contact with oxidant, there is a risk of combustion. The production equipment should be sealed to prevent running, shooting, dripping and leakage.
- store in a cool and ventilated warehouse, away from fire and heat source, and store separately from the oxidant. When handling, it is light and light, and the package is kept intact. According to the provisions of flammable chemicals storage and transportation.
Last Update：2022-01-01 10:39:19
1,2,3-Trimethylbenzene - Reference Information
| olfactory threshold (Odor Threshold) | 0.032ppm |
| Henry's Law Constant | 3.18 at 25 °C (approximate - calculated from water solubility and vapor pressure) |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used to prepare aniline dye, alkyd resin, polyester resin and benzelicarboxylic acid, etc. |
| production method | |
| category | flammable liquid |
| toxicity classification | poisoning |
| acute toxicity | 10ml/kg |
| flammability hazard characteristics | combustible in case of open flame, high temperature and strong oxidant; Combustion emission stimulates smoke |
| storage and transportation characteristics | complete packaging, light loading and unloading; warehouse ventilation, away from open flames, high temperature, separate storage from oxidant |
| fire extinguishing agent | foam, dry powder, carbon dioxide, sand |
| occupational standard | TLV-TWA 25 PPM |
| auto-ignition temperature | 878 °F |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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