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alpha-Methyl styrene |
CAS 98-83-9 |
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C6H5C(CH3)=CH2
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RTECS WL5075300 |
Synonyms & Trade Names
AMS, Isopropenyl benzene, 1-Methyl-1-phenylethylene, 2-Phenyl propylene
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DOT ID & Guide
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Exposure
Limits |
NIOSH REL: TWA 50 ppm (240 mg/m3) ST
100 ppm (485 mg/m3) |
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OSHA PEL†: C 100 ppm (480 mg/m3)
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IDLH 700 ppm |
Conversion 1 ppm = 4.83 mg/m3
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Physical Description
Colorless liquid with a characteristic odor. |
MW: 118.2
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BP: 330°F
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FRZ: -10°F
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Sol: Insoluble
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VP: 2 mmHg
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IP: 8.35 eV
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Sp.Gr: 0.91
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Fl.P: 129°F
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UEL: 6.1%
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LEL: 1.9%
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Class II Combustible Liquid: Fl.P. at or above
100°F and below 140°F. |
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.] |
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
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First Aid
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 |
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Symptoms Irritation eyes, skin, nose,
throat; drowsiness; dermatitis |
Target Organs Eyes, skin, respiratory
system, central nervous system
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Fuente: U.S. Department of Health and Human Services
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