UN/NA Number Reference
DOT Class 6.1 Toxic Substance placard

UN 1892: Ethyldichloroarsine

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1892 is assigned the proper shipping name Ethyldichloroarsine 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 152)

Hazards: TOXIC. Combustible. May be ignited by heat, sparks. Toxic fumes when burned.

Fire: Small: dry chemical, CO2, water spray. Large: water spray, fog.

Spill: Do not touch. Eliminate ignition sources. Ventilate area. Use water spray.

Chemical and Physical Properties

Ethyldichloroarsine appears as a chemical warfare blister agent. A colorless liquid with a fruity biting irritating odor. Vapors irritate eyes and skin. Very toxic by inhalation. Denser than water and vapors are heavier than air.

CAS Number: 598-14-1
Molecular Formula: C2H5AsCl2
Molecular Weight: 174.89 g/mol
Color / Form: Colorless, mobile liquid
Odor: Biting, irritant odor
Boiling Point: 168 F
Melting Point: -65 °C
Specific Gravity: 1.742 @ 14 C
Vapor Pressure: 2.29 [mmHg]
Vapor Density: 6 (heavier than air)
Water Solubility: Soluble in alcohol, benzene, ether, and water.

Special Provisions

49 CFR 172.102 special provision codes for this entry: 2, B9, B14, B32, 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 1892 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.