UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1605: Ethylene dibromide

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1605 is assigned the proper shipping name Ethylene dibromide in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 6.1 Toxic Substance material, Packing Group I. Required label(s): 6.1.

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 154)

Hazards: TOXIC. Corrosive. Non-combustible but may decompose producing toxic fumes when heated.

Fire: Use agent appropriate for surrounding fire. Cool containers.

Spill: Do not touch. Avoid inhalation. Use water spray to reduce fumes.

Chemical and Physical Properties

Ethylene dibromide appears as a clear colorless liquid with a sweetish odor. Density 18.1 lb /gal. Slightly soluble in water. Soluble in most organic solvents and thinners. Noncombustible. Very toxic by inhalation, skin absorption or ingestion. Used as a solvent, scavenger for lead in gasoline, grain fumigant and in the manufacture of other chemicals.

CAS Number: 106-93-4
Molecular Formula: C2H4Br2
Molecular Weight: 187.86 g/mol
Color / Form: Heavy liquid
Odor: Chloroform odor
Boiling Point: 268 to 270 F
Melting Point: 49.9 °F (NTP, 1992)
Autoignition: Not flammable (USCG, 1999)
Specific Gravity: 2.18 (sinks in water)
Vapor Pressure: 11 mmHg at 68 F
Vapor Density: 6.48 (heavier than air)
Water Solubility: less than 1 mg/mL at 70 F
Log P: log Kow = 1.96

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1 lb
OSHA PEL
See Annotated Z-2 See Annotated Z-2 ETHYLENE DIBROMIDE - ACGIH
NIOSH REL
Ca TWA 0.045 ppm C 0.13 ppm [15-minute]
IDLH
Ca [46 ppm]
RCRA Waste Code(s)
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A release of this material at or above its CERCLA reportable quantity (1 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: 2, B9, B14, B32, B77, T20, TP2, TP13, TP38, TP45. 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 1605 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.