UN/NA Number Reference
DOT Class 8 Corrosive placard

UN 2320: Tetraethylenepentamine

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 2320 is assigned the proper shipping name Tetraethylenepentamine in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 8 Corrosive material, Packing Group III. 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

Tetraethylenepentamine appears as a viscous liquid. Slightly less dense than water. Vapors heavier than air. Corrosive to the eyes, skin, mouth, throat and stomach. Vapors irritate the eyes and corrosive to the upper respiratory tract. Vapors may irritate the eyes. Flash point 325 °F.

CAS Number: 112-57-2
Molecular Formula: C8H23N5
Molecular Weight: 189.30 g/mol
Color / Form: VISCOUS, HYGROSCOPIC LIQUID
Odor: AMMONIACAL; DIAGREEABLE, PENETRATING
Boiling Point: 644 F
Melting Point: -40 °F (NTP, 1992)
Flash Point: 325 F
Autoignition: 610 °F (USCG, 1999)
Specific Gravity: 0.998 (floats on water)
Vapor Pressure: less than 0.01 mmHg at 68 F
Vapor Density: 6.53 (heavier than air)
Water Solubility: greater than or equal to 100 mg/mL at 72 F
Log P: log Kow= 1.503
pH: ALKALINE

Special Provisions

49 CFR 172.102 special provision codes for this entry: IB3, 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.

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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.