☣️ UN 2054 • CLASS 8
UN 2054 — Morpholine
Placard: Corrosive. 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.
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UN 2054 Quick Details
UN 2054
Product name: Morpholine
DOT Class: 8
Placard type: Corrosive
ERG Guide: 132 (check current ERG)
Initial isolation: ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consider evacuation 300m downwind.
Common Hazards of UN 2054
- 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
| Also known as | Tetrahydro-1,4-oxazineDiethylene imidoxideDiethylene oximide1-Oxa-4-azacyclohexane |
| CAS Number | 110-91-8 |
| Appearance | Colorless to pale yellow liquid with a weak ammonia or fish-like odor. Hygroscopic and completely miscible with water. |
| Flash Point | 35°C (95°F) |
| Boiling Point | 128°C (262°F) |
| Vapor Density | 3.0 (heavier than air) |
| Water Reactivity | Miscible with water; no significant reaction but generates heat on mixing. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2054
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical; water spray for cooling containers.
PPE Requirements
⚠️ Level B minimum; SCBA and chemical-resistant suit required; corrosive to skin and eyes.
Isolation & Evacuation
ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consider evacuation 300m downwind.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 132).
First Actions for a UN 2054 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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
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📋 Copy & Share Field Card
UN 2054 — MorpholineHAZMAT RADIO NOTE — UN 2054
Product: Morpholine
Class 8 / Corrosive / ERG 132
PPE: Level B minimum; SCBA and chemical-resistant suit required; corrosive to skin and eyes.
ISOLATION: ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consider evacuation 300m downwind.
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 2054 — Morpholine
Class: 8 | Placard: Corrosive | ERG Guide: 132
Appearance: Colorless to pale yellow liquid with a weak ammonia or fish-like odor. Hygroscopic and completely miscible with water.
Water Reactivity: Miscible with water; no significant reaction but generates heat on mixing.
Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling containers.
PPE: Level B minimum; SCBA and chemical-resistant suit required; corrosive to skin and eyes.
Isolation: ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consider evacuation 300m downwind.
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/2054 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2054 Morpholine Cls8 ERG132 | ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consi | allfirefighter.com/hazmat/un/2054SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/2054
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Frequently Asked Questions about UN 2054
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.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum; SCBA and chemical-resistant suit required; corrosive to skin and eyes.
Water reactivity: Miscible with water; no significant reaction but generates heat on mixing.. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling containers..
ERG Guide 132 recommendation: ERG 132: Small spill isolate 30m all directions; large spill isolate 100m, consider evacuation 300m downwind.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 132 and your department SOP/SOG for incident-specific protective actions.
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.