UN/NA Number Reference
DOT Class 8 Corrosive placard

UN 2079: Diethylenetriamine

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2079 is assigned the proper shipping name Diethylenetriamine in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 8 Corrosive material, Packing Group II. Required label(s): 8.

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 153)

Hazards: TOXIC. Combustible. Corrosive. Causes burns. Toxic fumes when heated.

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

Spill: Do not touch. Stop leak if safe. Use water spray to reduce vapor.

Chemical and Physical Properties

Diethylenetriamine appears as a yellow liquid with an ammonia-like odor. Less dense than water. Corrosive to metals and tissue. Vapors heavier than air. Burns, although possibly difficult to igntie. Toxic oxides of nitrogen produced during combustion. Used as a solvent for plastics and dyes and in chemical synthesis.

CAS Number: 111-40-0
Molecular Formula: C4H13N3
Molecular Weight: 103.17 g/mol
Color / Form: YELLOW LIQUID
Odor: AMMONIACAL ODOR
Boiling Point: 405 F
Melting Point: -38 °F (NTP, 1992)
Flash Point: 215 F
Autoignition: 676 °F (USCG, 1999)
Specific Gravity: 0.954 (floats on water)
Vapor Pressure: 0.22 mmHg at 68 F
Vapor Density: 3.48 (heavier than air)
Water Solubility: Very soluble
Log P: -1.3
pH: STRONGLY ALKALINE

Regulatory Data

OSHA PEL
none
NIOSH REL
TWA 1 ppm (4 mg/m 3 ) [skin]
IDLH
N

Special Provisions

49 CFR 172.102 special provision codes for this entry: B2, IB2, T7, TP2. 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.

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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.