1-methyl-1-phenylethene
Alpha-Methylstyrene
CAS: 98-83-9
Molecular Formula: C9H10
1-methyl-1-phenylethene - Names and Identifiers
| Name | Alpha-Methylstyrene |
| Synonyms | Isopropenylbenzene 2-Phenyl-1-Propene Alpha-Methylstyrene 1-methylethenylbenzine 1-methyl-1-phenylethene 1-methylethylenebenzene 1-methylethenyl-Benzene (1-methylethenyl)-benzen (1-Methylethenyl)benzene 1-Methyl-1-phenylethylene (1-methyl-ethenyl)-benzene alpha-Methylstyrene monomer |
| CAS | 98-83-9 |
| EINECS | 202-705-0 |
| InChI | InChI=1/C9H10/c1-8(2)9-6-4-3-5-7-9/h3-7H,1H2,2H3 |
| InChIKey | XYLMUPLGERFSHI-UHFFFAOYSA-N |
1-methyl-1-phenylethene - Physico-chemical Properties
| Molecular Formula | C9H10 |
| Molar Mass | 118.18 |
| Density | 0.909g/mLat 25°C(lit.) |
| Melting Point | −24°C(lit.) |
| Boling Point | 165-169°C(lit.) |
| Flash Point | 114°F |
| Water Solubility | insoluble |
| Solubility | 560mg/l |
| Vapor Presure | 2.1 mm Hg ( 20 °C) |
| Vapor Density | 4.1 (vs air) |
| Appearance | Liquid |
| Color | Clear colorless |
| Exposure Limit | NIOSH REL: TWA 50 ppm (240 mg/m3), STEL 100 ppm (485 mg/m3), IDLH700 ppm; OSHA PEL: ceiling 100 ppm; ACGIH TLV: TWA 50 ppm, STEL 100 ppm (adopted). |
| BRN | 969405 |
| PH | 5-6 (500g/l, H2O) |
| Storage Condition | 2-8°C |
| Explosive Limit | 0.9-6.6%(V) |
| Refractive Index | n20/D 1.539 |
| Physical and Chemical Properties | Properties: colorless liquid, heat or polymerization in the presence of a catalyst. melting point -23.2 ℃ boiling point 165 ℃ relative density 0.9062 refractive index 1.53864 flash point 57.8 ℃ solubility insoluble in water, soluble in ether, benzene, chloroform. |
| Use | Can be used for the production of coatings, plasticizers, also used as solvents |
1-methyl-1-phenylethene - Risk and Safety
| Risk Codes | R10 - Flammable R36/37 - Irritating to eyes and respiratory system. R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | 61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2303 3/PG 3 |
| WGK Germany | 2 |
| RTECS | WL5075300 |
| TSCA | Yes |
| HS Code | 2902 90 00 |
| Hazard Class | 3 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 4900 mg/kg |
1-methyl-1-phenylethene - Reference Information
| LogP | 3.48 at 25℃ |
| (IARC) carcinogen classification | 2B (Vol. 101) 2013 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | can be used in the production of coatings, plasticizers, and solvents This product is used as a polymer monomer, such as butyl toluene rubber and high temperature plastic. It can also be used to prepare coatings, hot melt adhesives, plasticizers and synthetic musk. In Japan, 90% of α-methylstyrene was used as a modifier for ABS resin, and the remainder was used as a solvent and a raw material for organic synthesis. organic synthesis. Polymerization of monomers. |
| production method | When phenol and acetone are produced by cumene method, α-methylstyrene is by-produced, an annual output of ten thousand tons of phenol and acetone plant, about 500T alpha-methyl styrene. This product can also be obtained by dehydrogenation of cumene in the presence of a catalyst. However, in the industry, the by-produced α-methylstyrene is often converted into cumene by hydrogenation. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 4900 mg/kg; Oral-mouse LD50: 4500 mg/kg |
| stimulation data | Skin-moderate in rabbits 100%; Eye -91 mg mild in rabbits |
| explosive hazard characteristics | the mixture of vapor and air can be exploded |
| flammability hazard characteristics | flammable; Spicy and irritating smoke released in the fire; Easy polymerization and exothermic |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Storage and transportation is separated from oxidant |
| extinguishing agent | dry powder, carbon dioxide, foam |
| Occupational Standard | TWA 240 mg/m3; Tel 480 mg/m3 |
| spontaneous combustion temperature | 445°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentration | 700 ppm |
Last Update：2024-04-10 22:29:15
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