UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 2688: 1-Bromo-3-chloropropane

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2688 is assigned the proper shipping name 1-Bromo-3-chloropropane 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 III. 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 159)

Hazards: Irritating to eyes, skin, respiratory tract. Prolonged exposure may cause serious health effects.

Fire: Use agent appropriate for surrounding fire. Use water to keep containers cool.

Spill: Ventilate area. Use water spray to knock down vapors. Absorb with earth/sand.

Chemical and Physical Properties

1-bromo-3-chloropropane appears as a colorless liquid. Insoluble in water and denser than water. May be toxic by inhalation, ingestion or skin absorption. Used to make pharmaceuticals and other chemicals.

CAS Number: 109-70-6
Molecular Formula: C3H6BrCl
Molecular Weight: 157.44 g/mol
Color / Form: COLORLESS LIQUID
Boiling Point: 143.3 C @ 760 MM HG
Melting Point: -58.90 °C
Flash Point: 57 C
Specific Gravity: 1.5969 @ 20 C/4 C
Vapor Pressure: 6.38 [mmHg]
Vapor Density: 5.4 (heavier than air)
Water Solubility: Very sol in alc, ether, chloroform
Log P: Log P = 2.18

Special Provisions

49 CFR 172.102 special provision codes for this entry: IB3, T4, TP1. 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 2688 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.