1,2,3-Trimethylbenzene
- Hemimellitene
1,2,3-Trimethylbenzene | |
| |
| Formula | C9H12 |
| Structure | |
| Description | Clear, colorless liquid with a distinctive, aromatic odor. |
| Registry Numbers and Inventories. | |
| CAS | 526-73-8 |
| EC (EINECS/ELINCS) | 208-394-8 |
| RTECS | DC3300000 |
| RTECS class | Mutagen |
| UN (DOT) | 1993 |
| Beilstein/Gmelin | 1903410 |
| Beilstein Reference | 4-05-00-01007 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C9H12 |
| Formula mass | 120.21 |
| Melting point, °C | -25 |
| Boiling point, °C | 175 |
| Vapor pressure, mmHg | 1 |
| Vapor density (air=1) | 4.15 |
| Critical temperature | 392 |
| Critical pressure | 33.98 |
| Density | 0.9101 g/cm3 (0 C) |
| Solubility in water | Slightly soluble |
| Surface tension | 31.27 g/s2 (20 C) |
| Refractive index | 1.5093 (19.5 C) |
| Hazards and Protection. | |
| Storage | Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Flammables-area. |
| Handling | All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood. |
| Protection | Wear appropriate protective gloves, clothing and goggles. |
| Respirators | Wear positive pressure self-contained breathing apparatus (SCBA). |
| Small spills/leaks | Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material. |
| Stability | No data. |
| Incompatibilities | Keep away from nitric acid and oxidizers. |
| Decomposition | Oxides of carbon. |
| Fire. | ||||
| Flash Point,°C | 51 | |||
| Autoignition, °C | 470 | |||
| Upper exp. limit, % | 5.2 | |||
| Lower exp. limit, % | 0.9 | |||
| Fire fighting | Use of water spray when fighting fire may be inefficient. Small Fires: Dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam. Use water spray or fog; do not use straight streams. | |||
| Fire potential | HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. | |||
| Hazards | Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. | |||
| Combustion products | Fire may produce irritating, corrosive and/or toxic gases. | |||
| NFPA | Health | 0 | ||
| Flammability | 2 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | NIOSH REL: TWA 25 ppm (125 mg/m3) |
| Exposure effects | The toxological properties of this substance have not been fully investigated. |
| Ingestion | May cause irritation. |
| Inhalation | Vapors may cause dizziness or suffocation. May cause irritation or burns. |
| Skin | May cause irritation or burns. |
| Eyes | See Skin. |
First aid |
|
| Ingestion | Seek medical assistance. |
| Inhalation | Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. |
| Skin | Remove and isolate contaminated clothing and shoes. Wash skin with soap and water. Flush with running water for at least 20 minutes |
| Eyes | Flush with running water for at least 20 minutes. |
| Transport. | ||
| UN number | 1993 | |
| Response guide | 128 | |
| Hazard class | 3 | |
| Packing Group | I; II; III | |
| USCG CHRIS Code | TMD | |
| USCG Compatatibility Group | 32 Aromatic hydrocarbons | |
| IMO Chemical Code | 17 | |
| IMO Pollution Category | A | |
| IMO Hazard code | P | |