UN/NA Number Reference
DOT Class 2.3 Toxic Gas placard

UN 1062: Methyl bromide

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1062 is assigned the proper shipping name Methyl bromide in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 2.3 Toxic Gas material. Required label(s): 2.3.

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 123)

Hazards: TOXIC. May be fatal if inhaled. Corrosive to metals and tissue. Vapors heavier than air.

Fire: Small: dry chemical or CO2. Large: water spray or fog. Do not use water jet.

Spill: Fully encapsulating suit. Stop leak if safe. Use water spray to reduce vapor.

Chemical and Physical Properties

Methyl bromide appears as colorless highly toxic volatile liquid or a gas. Boiling point 3.56 °C (38.41 °F). Usually odorless, but has a sweetish chloroform-like odor at high concentrations. Used as an insecticide, a rodenticide, a fumigant, a nematocide, a chemical intermediate and as a fire extinguishing agent. (EPA, 1998)

CAS Number: 74-83-9
Molecular Formula: CH3Br
Molecular Weight: 94.94 g/mol
Color / Form: Colorless, transparent, easily liquified gas or volatile liquid
Odor: Usually odorless; sweetish, chloroform-like odor at high concentrations
Boiling Point: 38.4 F
Melting Point: -136 °F (EPA, 1998)
Flash Point: None (EPA, 1998)
Autoignition: 999 °F (USCG, 1999)
Specific Gravity: 1.73 (sinks in water)
Vapor Pressure: 1420 mmHg at 68 F
Vapor Density: 3.27 (heavier than air)
Water Solubility: 2 %
Log P: log Kow = 1.19

Regulatory Data

CERCLA RQ (40 CFR 302.4)
1000 lb
EPCRA TPQ (40 CFR 355)
1000 lb
OSHA PEL
(C) 20 (C) 80 1 ppm (C) 20 ppm
NIOSH REL
Ca
IDLH
Ca [250 ppm]
RCRA Waste Code(s)
[object Object]

A release of this material at or above its CERCLA reportable quantity (1000 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: 3, B14, N86, T50. 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 1062 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.