# NIOSH Pocket Guide to Chemical Hazards
Ethyl bromide | CAS 74-96-4
CH3CH2Br | RTECS KH6475000
Synonyms & Trade Names Bromoethane, Monobromoethane | DOT ID & Guide 1891 131
Exposure Limits | NIOSH REL: See Appendix D
OSHA PEL†: TWA 200 ppm (890 mg/m3)
IDLH 2000 ppm | 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 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium
Measurement Methods NIOSH 1011; OSHA 7
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: Soap flush promptly Breathing: Respiratory support Swallow: Medical attention immediately
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 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, 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
See also: INTRODUCTION