# NIOSH Pocket Guide to Chemical Hazards
Boron tribromide | CAS 10294-33-4
BBr3 | RTECS ED7400000
Synonyms & Trade Names Boron bromide, Tribromoborane | DOT ID & Guide 2692 157
Exposure Limits | NIOSH REL: C 1 ppm (10 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 10.25 mg/m3
Physical Description Colorless, fuming liquid with a sharp, irritating odor.
MW: 250.5 | BP: 194°F | FRZ: -51°F | Sol: Decomposes
VP(57°F): 40 mmHg | IP: 9.70 eV |  | Sp.Gr(65°F): 2.64
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Liquid
Incompatibilities & Reactivities Moisture, water, heat, potassium, sodium, alcohols [Note: Attacks metals, wood & rubber. Reacts with water to form boric acid and hydrogen bromide.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; eye, skin burns; dyspnea (breathing difficulty), pulmonary edema
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION