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| alpha-Methyl styrene | CAS 98-83-9 | ||
| C6H5C(CH3)=CH2 | RTECS WL5075300 | ||
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Synonyms & Trade Names AMS, Isopropenyl benzene, 1-Methyl-1-phenylethylene, 2-Phenyl propylene |
DOT ID & Guide |
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Exposure Limits |
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 | Conversion 1 ppm = 4.83 mg/m3 | ||
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Physical Description Colorless liquid with a characteristic odor. |
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MW: 118.2 |
BP: 330°F |
FRZ: -10°F |
Sol: Insoluble |
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VP: 2 mmHg |
IP: 8.35 eV |
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Sp.Gr: 0.91 |
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Fl.P: 129°F |
UEL: 6.1% |
LEL: 1.9% |
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| Class II Combustible Liquid: Fl.P. at or above 100�F and below 140�F. | |||
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Incompatibilities & Reactivities Oxidizers, peroxides, halogens, catalysts for vinyl or ionic polymers; aluminum, iron chloride, copper [Note: Usually contains an inhibitor such as tert-butyl catechol.] |
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Measurement Methods NIOSH 1501; OSHA 7 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush promptly Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH Up to 500 ppm: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*/(APF = 10) Any supplied-air respirator* Up to 700 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*/(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, nose, throat; drowsiness; dermatitis | |
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Target Organs
Eyes, skin, respiratory system, central nervous system |
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| See also: INTRODUCTION |