September 2010
NIOSH Publication Number 2010-168c

Ethyl benzene

Synonyms & Trade Names
Ethylbenzol, Phenylethane
CAS No.
100-41-4
RTECS No.
DA0700000
DOT ID & Guide
1175 130
Formula
CH3CH2C6H5
Conversion
1 ppm = 4.34 mg/m3
IDLH
800 ppm [10%LEL]
See: 100414
Exposure Limits
NIOSH REL
: TWA 100 ppm (435 mg/m3) ST 125 ppm (545 mg/m3)
OSHA PEL
†: TWA 100 ppm (435 mg/m3)
Measurement Methods

NIOSH 1002
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 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong oxidizers
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
Personal Protection/Sanitation
(See protection codes)
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

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0268   See MEDICAL TESTS: 0098