NIOSH Pocket Guide to Chemical Hazards

Ethyl benzene CAS 100-41-4
CH3CH2C6H5 RTECS DA0700000
Synonyms & Trade Names
Ethylbenzol, Phenylethane
DOT ID & Guide
1175 129
Exposure
Limits
NIOSH REL: TWA 100 ppm (435 mg/m3) ST 125 ppm (545 mg/m3)
OSHA PEL: TWA 100 ppm (435 mg/m3)
IDLH 800 ppm [10%LEL] Conversion 1 ppm = 4.34 mg/m3
Physical Description
Colorless liquid with an aromatic odor.
MW: 106.2
BP: 277°F
FRZ: -139°F
Sol: 0.01%
VP: 7 mmHg
IP: 8.76 eV

Sp.Gr: 0.87
Fl.P: 55°F
UEL: 6.7%
LEL: 0.8%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 1501; OSHA 7, 1002
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 promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 800 ppm: (APF = 10) Any chemical cartridge respirator with 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 = 10) Any supplied-air respirator*/(APF = 50) Any self-contained breathing apparatus 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
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane; headache; dermatitis; narcosis, coma
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION