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| Styrene | CAS 100-42-5 | ||
| C6H5CH=CH2 | RTECS WL3675000 | ||
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Synonyms & Trade Names Ethenyl benzene, Phenylethylene, Styrene monomer, Styrol, Vinyl benzene |
DOT ID & Guide 2055 128P (inhibited) |
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Exposure Limits |
NIOSH REL: TWA 50 ppm (215 mg/m3) ST 100 ppm (425 mg/m3) | ||
| OSHA PEL�: TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours) | |||
| IDLH 700 ppm | 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 |
BP: 293°F |
FRZ: -23°F |
Sol: 0.03% |
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VP: 5 mmHg |
IP: 8.40 eV |
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Sp.Gr: 0.91 |
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Fl.P: 88°F |
UEL: 6.8% |
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 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation |
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 |
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| Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact | |
| 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 |