UN/NA Number Reference
DOT Class 8 Corrosive placard

UN 2259: Triethylenetetramine

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2259 is assigned the proper shipping name Triethylenetetramine 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

Triethylenetetramine appears as a yellowish liquid. Less dense than water. Combustible, though may be difficult to ignite. Corrosive to metals and tissue. Vapors heavier than air. Toxic oxides of nitrogen produced during combustion. Used in detergents and in the synthesis of dyes, pharmaceuticals and other chemicals.

CAS Number: 112-24-3
Molecular Formula: C6H18N4
Molecular Weight: 146.23 g/mol
Color / Form: MODERATELY VISCOUS, YELLOWISH LIQUID
Boiling Point: 511 to 513 F
Melting Point: 54 °F (NTP, 1992)
Flash Point: 275 F
Autoignition: 640 °F (USCG, 1999)
Specific Gravity: 0.982 (floats on water)
Vapor Pressure: less than 0.01 mmHg at 68 F
Vapor Density: 5.04 (heavier than air)
Water Solubility: greater than or equal to 100 mg/mL at 68.4 F
Log P: -1.4/-1.66
pH: STRONGLY BASIC (PH 10 IN 1% AQ SOLN)

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.

Need the full interactive record? Open UN 2259 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.