UN/NA Number Reference
DOT Class 5.1 Oxidizer placard

UN 1745: Bromine pentafluoride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1745 is assigned the proper shipping name Bromine pentafluoride in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 5.1 Oxidizer material, Packing Group I. Required label(s): 5.1, 6.1, 8.

Packing group indicates the degree of danger within a hazard class: PG I is high danger, PG II medium, PG III low. The proper shipping name, hazard class, UN number, and packing group together form the basic shipping description that must appear on shipping papers and, where required, on the package and placard.

Emergency Response (ERG Guide 144)

Hazards: Oxidizer. Reacts with water. May produce toxic or corrosive solutions.

Fire: DO NOT use water directly. Use dry chemical, sand.

Spill: Keep material dry. Keep combustibles away.

Chemical and Physical Properties

Bromine pentafluoride appears as a colorless, fuming liquid with a pungent odor. Used to make other chemicals and in rockets. Very toxic by inhalation. Corrosive to metals and tissue. Will accelerate the burning of combustible material. If the containers are involved in a fire they may rupture violently and rocket.

CAS Number: 7789-30-2
Molecular Formula: BrF5
Molecular Weight: 174.90 g/mol
Color / Form: Liquid
Odor: Pungent odor
Boiling Point: 106 F
Melting Point: -76 °F (USCG, 1999)
Specific Gravity: 2.48 (sinks in water)
Vapor Pressure: 328 mmHg
Vapor Density: 6.05 (heavier than air)
Water Solubility: Reacts with water violently

Regulatory Data

OSHA PEL
none
NIOSH REL
TWA 0.1 ppm (0.7 mg/m³)
IDLH
1

Special Provisions

49 CFR 172.102 special provision codes for this entry: 1, B9, B14, B30, T22, TP2, TP13, TP38, TP44. These codes modify the general requirements (packaging, quantity limits, exceptions) for this specific material. Look up each code in 49 CFR 172.102 for the full text.

Need the full interactive record? Open UN 1745 in the SpillNerd lookup tool for the live database entry with placard graphics, GHS pictograms, full segregation tables, and synonym search. For another material, use the UN number and chemical lookup.

Reference data compiled from the DOT Hazardous Materials Table (49 CFR 172.101), the 2024 Emergency Response Guidebook, and public chemical databases (PubChem, NIOSH, EPA). Always verify the correct shipping description against the current regulation and the manufacturer's SDS Section 14 before shipping.