NIOSH Pocket Guide to Chemical Hazards

Ethyl bromide

CAS 74-96-4


RTECS KH6475000
Synonyms & Trade Names
Bromoethane, Monobromoethane
DOT ID & Guide
1891 131


NIOSH REL: See Appendix D
OSHA PEL: TWA 200 ppm (890 mg/m3)
IDLH 2000 ppm See: 74964 Conversion 1 ppm = 4.46 mg/m3
Physical Description
Colorless to yellow liquid with an ether-like odor. [Note: A gas above 101°F.]
MW: 109.0
BP: 101°F
FRZ: -182°F
Sol: 0.9%
VP: 375 mmHg
IP: 10.29 eV

Sp.Gr: 1.46
Fl.P: <4°F
UEL: 8.0%
LEL: 6.8%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium
Measurement Methods
NIOSH 1011; OSHA 7
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

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations OSHA
Up to 2000 ppm:
(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
(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, respiratory system; central nervous system depression; pulmonary edema; liver, kidney disease; cardiac arrhythmias, cardiac arrest
Target Organs Eyes, skin, respiratory system, liver, kidneys, cardiovascular system, central nervous system