Isopropenylbenzene
- alpha-Methyl styrene
- 1-Methyl-1-phenyl ethylene
- (1-Methylethenyl)benzene
Isopropenylbenzene | |
| |
| Formula | C6H5C(CH3)=CH2 |
| Structure | |
| Description | Colorless liquid with characteristic odor. Lachrymator. |
| Uses | Polymerization monomer, especially for polyesters. |
| Registry Numbers and Inventories. | |
| CAS | 98-83-9 |
| EC (EINECS/ELINCS) | 202-705-0 |
| EC Index Number | 601-027-00-6 |
| EC Class | Flammable; Irritant; Dangerous for the Environment |
| EC Risk Phrase | R 10 36/37 51/53 |
| EC Safety Phrase | S 61 |
| RTECS | WL5075300 |
| RTECS class | Tumorigen; Mutagen; Human Data; Primary Irritant |
| UN (DOT) | 2303 |
| Beilstein/Gmelin | 969405 |
| Beilstein Reference | 4-05-00-01364 |
| Swiss Giftliste 1 | G-2534 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C9H10 |
| Formula mass | 118.18 |
| Melting point, °C | -23 |
| Boiling point, °C | 165.4 |
| Vapor pressure, mmHg | 2.8 (25 C) |
| Vapor density (air=1) | 4.08 |
| Saturation Concentration | 3026 ppm (0.3%) at 20 C (calculated) |
| Critical temperature | 371.9 |
| Critical pressure | 3.5 |
| Density | 0.9108 g/cm3 (20 C) |
| Solubility in water | Insoluble |
| Viscosity | 0.940 cp at 20C |
| Surface tension | 32.40 g/s2 at 20 C |
| Refractive index | 1.5386 (20C) |
| Partition coefficient, pKow | 3.48 |
| Heat of vaporization | 38.3 kJ/mol |
| Heat of combustion | -5087 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. |
| Handling | Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. 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 | Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. |
| Small spills/leaks | Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. 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. |
| Decomposition | Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 40 | |||
| Autoignition, °C | 445 | |||
| Upper exp. limit, % | 6.6 | |||
| Lower exp. limit, % | 0.9 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. 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. Use agent most appropriate to extinguish fire. Do NOT use straight streams of water. | |||
| Fire potential | HIGHLY FLAMMABLE. | |||
| 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. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substance may be transported hot. | |||
| Combustion products | When heated to decomposition, it emits acrid smoke and fumes. | |||
| NFPA | Health | 2 | ||
| Flammability | 2 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | NIOSH REL: TWA 50 ppm (240 mg/m3) ST 100 ppm (485 mg/m3) OSHA PEL: C 100 ppm (480 mg/m3) IDLH 700 ppm |
| Poison_Class | 3 |
| Exposure effects | Effects may be delayed. |
| Ingestion | May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Ingestion of large amounts may cause CNS depression. |
| Inhalation | Causes respiratory tract irritation. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest. |
| Skin | May cause irritation and dermatitis. May cause cyanosis of the extremities. |
| Eyes | Causes eye irritation. Lachrymator. May cause chemical conjunctivitis and corneal damage. |
First aid |
|
| Ingestion | Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. |
| Inhalation | Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. |
| 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 | Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. |
| Transport. | ||
| UN number | 2303 | |
| Response guide | 128 | |
| Hazard class | 3 | |
| Packing Group | III | |
| USCG CHRIS Code | MSR | |
| USCG Compatatibility Group | 30 Olefins | |
| HS Code | 2902 90 80 | |
| Std. Transport # | 4912631 | |
| IMO Chemical Code | 17 | |
| IMO Pollution Category | A | |
| IMO Hazard code | S/P | |