1,2,4-Trimethylbenzene
- Pseudocumene
1,2,4-Trimethylbenzene | |
| |
| Formula | C9H12 |
| Structure | |
| Description | Colorless liquid, distinctive aromatic odor. |
| Uses | Sterilizing catgut manufacture of dyes, perfumes & resins. |
| Registry Numbers and Inventories. | |
| CAS | 95-63-6 |
| EC (EINECS/ELINCS) | 202-436-9 |
| EC Index Number | 601-043-00-3 |
| EC Class | Flammable; Harmful; Irritant; Dangerous for the Environment |
| EC Risk Phrase | R 10 20 36/37/38 51/53 |
| EC Safety Phrase | S 26 61 |
| RTECS | DC3325000 |
| RTECS class | Mutagen |
| UN (DOT) | 1993 |
| Merck | 12,8100 |
| Beilstein/Gmelin | 1903005 |
| Beilstein Reference | 4-05-00-01010 |
| Swiss Giftliste 1 | G-2816 |
| 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 | 120.20 |
| Melting point, °C | -44 |
| Boiling point, °C | 169 |
| Vapor pressure, mmHg | 2 (20 C) |
| Vapor density (air=1) | 4.15 |
| Saturation Concentration | 1300 ppm at 13.6 C (calc.) |
| Critical temperature | 376.13 |
| Critical pressure | 32.3 |
| Density | 0.881 g/cm3 (15 C) |
| Solubility in water | 60 mg/L |
| Viscosity | 2.011 cp (20 C) |
| Surface tension | 29.71 g/s2 @ 20 C |
| Refractive index | 1.5044 (20 C) |
| Partition coefficient, pKow | 3.41 |
| Heat of vaporization | 39.2 kJ/mol |
| Heat of combustion | -5365 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. |
| WHMIS | B3 |
| Handling | Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Take precautionary measures against static discharges. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. |
| Protection | Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. |
| Respirators | A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. |
| Small spills/leaks | Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. |
| Disposal code | 1 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Strong oxidizing agents, nitric acid. |
| Decomposition | Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 48 | |||
| Autoignition, °C | 485 | |||
| Upper exp. limit, % | 7 | |||
| Lower exp. limit, % | 0.8 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. This material is lighter than water and insoluble in water. The fire could easily be spread by the use of water. | |||
| Fire potential | Moderate fire risk. In absence of precautions, flammable concentration of vapor may be present where liquids are used in solvent and thinner operations. Trimethyl benzene | |||
| 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 | 1 | ||
| Flammability | 2 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | NIOSH REL: TWA 25 ppm (125 mg/m3) |
| Poison_Class | 4 |
| Exposure effects | Prolonged or repeated skin contact may cause dermatitis. Repeated inhalation may cause chronic bronchitis. May cause anemia and other blood cell abnormalities. Prolonged exposure may produce a narcotic effect. Prolonged or repeated exposure may cause nausea, dizziness, and headache. Laboratory experiments have resulted in mutagenic effects. |
| Ingestion | May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause central nervous system depression. |
| Inhalation | May cause drowsiness, unconsciousness, and central nervous system depression. Vapors may cause dizziness or suffocation. Causes irritation of the mucous membrane and upper respiratory tract. |
| Skin | Causes skin irritation. May be absorbed through the skin. Causes redness and pain. |
| Eyes | Causes eye irritation. Causes redness and pain. May cause irritation of the conjunctiva. |
First aid |
|
| Ingestion | Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. |
| Eyes | Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. |
| Transport. | ||
| UN number | 1993 | |
| Response guide | 128 | |
| Hazard class | 3 | |
| Packing Group | I; II; III | |
| USCG CHRIS Code | TME | |
| USCG Compatatibility Group | 32 Aromatic hydrocarbons | |
| HS Code | 2902 90 80 | |
| Std. Transport # | 4912061 | |
| IMO Chemical Code | 17 | |
| IMO Pollution Category | A | |
| IMO Hazard code | P | |