UN/NA Number Reference
DOT Class 3 Flammable Liquid placard

UN 1107: Amyl chloride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1107 is assigned the proper shipping name Amyl chloride in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 3 Flammable Liquid material, Packing Group II. Required label(s): 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 129)

Hazards: Flammable. Irritating vapor. May cause dizziness. Toxic if inhaled or absorbed through skin.

Fire: Alcohol-resistant foam, dry chemical, CO2, water spray.

Spill: Eliminate ignition sources. Ventilate area. Absorb with earth or sand.

Chemical and Physical Properties

Amyl chloride appears as a clear colorless to light-brown liquid with an aromatic odor. Flash point may vary from 35 to 54 °F. Less dense than water and insoluble in water. Hence floats on water. Vapors are heavier than air. Vapors may be narcotic in high concentrations.

CAS Number: 543-59-9
Molecular Formula: C5H11Cl
Molecular Weight: 106.59 g/mol
Color / Form: Liquid
Odor: Sweet odor
Boiling Point: 226 F
Melting Point: -146 °F (USCG, 1999)
Flash Point: 34 F
Autoignition: 500 °F (USCG, 1999)
Specific Gravity: 0.8834 (floats on water)
Vapor Pressure: 32.9 [mmHg]
Vapor Density: 3.67 (heavier than air)
Water Solubility: In water, 197 mg/L at 25 C
Log P: log Kow = 2.73

Special Provisions

49 CFR 172.102 special provision codes for this entry: IB2, 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 1107 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.