☣️ UN 1154 • CLASS 3

UN 1154 — Diethylamine

Placard: Flammable. ERG Guide 132. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.

🚒☣️
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.

Diethylamine is a highly volatile and flammable substance that requires careful handling and storage. It is commonly used in various industrial applications, including the production of pharmaceuticals and pesticides.

Hazard overview: Diethylamine is a flammable and combustible material that may be ignited by heat, sparks, or flames. Prolonged exposure to the substance can cause serious health effects, including respiratory problems and skin irritation.

Response guidance: In the event of a diethylamine spill, emergency responders should isolate the area and evacuate anyone in the surrounding vicinity. A self-contained breathing apparatus (SCBA) and chemical-resistant suit are required to mitigate the risks associated with the substance.

Advertisement

UN 1154 Quick Details

UN 1154
Product name: Diethylamine
DOT Class: 3
Placard type: Flammable
ERG Guide: 132 (check current ERG)
Initial isolation: ERG 132: isolate spill 50m all directions; evacuate 800m downwind if large spill; 1600m if tank/rail car involved in fire

Common Hazards of UN 1154

  • Flammable/combustible material.
  • May be ignited by heat, sparks or flames.
  • Vapors may form explosive mixtures with air.
  • Vapors may travel to source of ignition and flash back.
  • Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
  • Vapor explosion hazard indoors, outdoors or in sewers.
  • Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
  • Runoff to sewer may create fire or explosion hazard.

Chemical Identity & Physical Properties

Diethylamine is a colorless liquid with a strong ammonia-like or fishy odor, highly volatile at room temperature.

Also known asN-EthylethanamineDiethylamine anhydrousDEAN,N-Diethylamine
CAS Number109-89-7
AppearanceColorless liquid with a strong ammonia-like or fishy odor. Highly volatile at room temperature.
Flash Point-23C (-9F)
Boiling Point56C (133F)
Vapor Density2.5 (heavier than air)
Water ReactivitySoluble in water; exothermic reaction but not violent
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1154

Extinguishing Media

Alcohol-resistant foam, CO2, dry chemical; water spray for cooling

PPE Requirements

⚠️ Level B minimum; SCBA and chemical-resistant suit required; nitrile or butyl rubber gloves

Level B minimum personal protective equipment, including SCBA and chemical-resistant suit, and nitrile or butyl rubber gloves are required when handling diethylamine.

Isolation & Evacuation

ERG 132: isolate spill 50m all directions; evacuate 800m downwind if large spill; 1600m if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 132).

First Actions for a UN 1154 Incident

  • Keep unauthorized personnel away.
  • Stay upwind, uphill and/or upstream.
  • Ventilate closed spaces before entering, but only if properly trained and equipped.
  • Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
  • For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
  • For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
Advertisement

📋 Copy & Share Field Card

UN 1154 — Diethylamine
HAZMAT RADIO NOTE — UN 1154 Product: Diethylamine Class 3 / Flammable / ERG 132 PPE: Level B minimum; SCBA and chemical-resistant suit required; nitrile or butyl rubber gloves ISOLATION: ERG 132: isolate spill 50m all directions; evacuate 800m downwind if large spill; 1600m if tank/rail car involved in fire ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO

Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.

SMS WhatsApp
=== IC HAZMAT BRIEFING === UN 1154 — Diethylamine Class: 3 | Placard: Flammable | ERG Guide: 132 Appearance: Colorless liquid with a strong ammonia-like or fishy odor. Highly volatile at room temperature. Water Reactivity: Soluble in water; exothermic reaction but not violent Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling PPE: Level B minimum; SCBA and chemical-resistant suit required; nitrile or butyl rubber gloves Isolation: ERG 132: isolate spill 50m all directions; evacuate 800m downwind if large spill; 1600m if tank/rail car involved in fire — Key Hazards — • Flammable/combustible material. • May be ignited by heat, sparks or flames. • Vapors may form explosive mixtures with air. — First Actions — • Keep unauthorized personnel away. • Stay upwind, uphill and/or upstream. • Ventilate closed spaces before entering, but only if properly trained and equipped. • Isolate spill or leak area for at least 50 meters (150 feet) in all directions. SOURCE: allfirefighter.com/hazmat/un/diethylamine-un-1154 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)
UN1154 Diethylamine Cls3 ERG132 | allfirefighter.com/hazmat/un/diethylamine-un-1154SMS / 160 CHAR

Use for: Quick text to command or incoming units. Fits in a single SMS.

⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/diethylamine-un-1154

Related UN Numbers in Class 3

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
Advertisement

Frequently Asked Questions about UN 1154

Yes, diethylamine is a highly flammable and combustible material.

The recommended isolation distance for a diethylamine spill is 50m in all directions.

Diethylamine fires can be extinguished using alcohol-resistant foam, CO2, or dry chemical, and water spray for cooling.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.