UN/NA Number Reference
DOT Class 8 Corrosive placard

UN 1716: Acetyl bromide

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1716 is assigned the proper shipping name Acetyl bromide in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 8 Corrosive material, Packing Group II. Required label(s): 8, 3.

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 156)

Hazards: TOXIC or CORROSIVE. FLAMMABLE. Vapors may travel to ignition source.

Fire: Alcohol-resistant foam, dry chemical, CO2. Water spray for cooling only.

Spill: Eliminate ignition sources. Do not touch. Ventilate area.

Chemical and Physical Properties

Acetyl bromide appears as a colorless fuming liquid with a pungent odor. Vapors irritate eyes and mucous membranes. Corrosive to metals and tissue. Density 13.9 lb / gal.

CAS Number: 506-96-7
Molecular Formula: C2H3BrO
Molecular Weight: 122.95 g/mol
Color / Form: Fuming liquid
Odor: Sharp unpleasant odor
Boiling Point: 169 F
Melting Point: -141.7 °F (USCG, 1999)
Flash Point: 110 C (230 F) - closed cup
Specific Gravity: 1.66 (sinks in water)
Vapor Pressure: 122.0 [mmHg]
Vapor Density: 4.2 (heavier than air)
Water Solubility: Violently decomposed by water or alcohol

Regulatory Data

CERCLA RQ (40 CFR 302.4)
5000 lb

A release of this material at or above its CERCLA reportable quantity (5000 lb) requires immediate notification to the National Response Center at 800-424-8802.

Special Provisions

49 CFR 172.102 special provision codes for this entry: B2, IB2, T8, TP2. 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 1716 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.