Styrene
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CAS
100-42-5
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C6H5CH=CH2
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RTECS
WL3675000
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Synonyms & Trade Names
Ethenyl benzene, Phenylethylene, Styrene monomer, Styrol, Vinyl benzene
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DOT ID & Guide
2055 / 128P (inhibited)
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Exposure
Limits
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NIOSH REL: TWA 50 ppm (215 mg/m3) ST 100 ppm (425 mg/m3)
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OSHA PEL†: TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours)
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IDLH
700 ppm
See: 100425
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Conversion
1 ppm = 4.26 mg/m3
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Physical Description
Colorless to yellow, oily liquid with a sweet, floral odor.
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MW: 104.2
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BP: 293°F
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FRZ: -23°F
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Sol: 0.03%
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VP: 5 mmHg
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IP: 8.40 eV
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Sp.Gr: 0.91
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Fl.P: 88°F
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UEL: 6.8%
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LEL: 0.9%
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Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
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Incompatibilities & Reactivities
Oxidizers, catalysts for vinyl polymers, peroxides, strong acids, aluminum chloride [Note: May polymerize if contaminated or subjected to heat. Usually contains an inhibitor such as tert-butylcatechol.]
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Measurement Methods
NIOSH 1501, 3800; OSHA 9, 89
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush
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
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, nose, respiratory system; headache, lassitude (weakness, exhaustion), dizziness, confusion, malaise (vague feeling of discomfort), drowsiness, unsteady gait; narcosis; defatting dermatitis; possible liver injury; reproductive effects
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Target Organs
Eyes, skin, respiratory system, central nervous system, liver, reproductive system
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See also: INTRODUCTION
See ICSC CARD: 0073 See MEDICAL TESTS: 0214
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