UN/NA Number Reference

UN 1100: Allyl chloride

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1100 is assigned the proper shipping name Allyl 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 I. Required label(s): 3, 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 131)

Hazards: HIGHLY FLAMMABLE. TOXIC. May be fatal if inhaled, swallowed, or absorbed through skin. Vapors heavier than air.

Fire: Small: dry chemical, CO2, water spray, alcohol-resistant foam. Large: water spray, fog, alcohol-resistant foam.

Spill: Eliminate ignition sources. Do not touch. Stop leak if safe. Use vapor-suppressing foam. Ventilate area.

Chemical and Physical Properties

Allyl chloride appears as a clear colorless liquid with an unpleasant pungent odor. Flash point -20 °F. Boiling point 113 °F. Less dense than water (7.8 lb / gal) and insoluble in water. Hence floats on water. Vapor irritates skin, eyes and mucous membranes. Vapors are heavier than air. Long exposure to low concentrations or short exposure to high concentrations may have adverse health effects from inhalation or skin absorption.

CAS Number: 107-05-1

Molecular Formula: C3H5Cl

Molecular Weight: 76.52 g/mol

Color / Form: RED LIQUID

Odor: Pungent, unpleasant odor.

Boiling Point: 113 F

Melting Point: -210.1 °F (NTP, 1992)

Flash Point: -25 F

Autoignition: 737 °F (USCG, 1999)

Specific Gravity: 0.94 (floats on water)

Vapor Pressure: 340 mmHg at 68 F

Vapor Density: 2.64 (heavier than air)

Water Solubility: 1 to 10 mg/mL at 66 F

Log P: 2.1

Regulatory Data

CERCLA RQ (40 CFR 302.4)

1000 lb

OSHA PEL

TWA 1 ppm (3 mg/m 3 )

NIOSH REL

TWA 1 ppm (3 mg/m 3 ) ST 2 ppm (6 mg/m 3 )

IDLH

250 ppm

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: T14, TP2, TP13. 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 1100 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.