☣️ UN 2264 • CLASS 8
UN 2264 — N,N-Dimethylcyclohexylamine
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 2264 Quick Details
UN 2264
Product name: N,N-Dimethylcyclohexylamine
DOT Class: 8
Placard type: Corrosive
ERG Guide: 132 (check current ERG)
Initial isolation: ERG 132: Isolate spill 50m in all directions; for large spill isolate 150m initially, evacuate downwind as needed
Common Hazards of UN 2264
- 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 | N,N-DimethylcyclohexanamineDimethylcyclohexylamineDMCHAN-Cyclohexyl-N,N-dimethylamine |
| CAS Number | 98-94-2 |
| Appearance | Clear to pale yellow liquid with an amine-like, fishy odor. Corrosive liquid at room temperature. |
| Flash Point | 36°C (97°F) |
| Boiling Point | 159-160°C (318-320°F) |
| Vapor Density | 4.4 (heavier than air) |
| Water Reactivity | Reacts exothermically with water; may produce heat and corrosive solutions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2264
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers
PPE Requirements
⚠️ Level B minimum with chemical-resistant suit; SCBA required; neoprene or butyl rubber gloves
Isolation & Evacuation
ERG 132: Isolate spill 50m in all directions; for large spill isolate 150m initially, evacuate downwind as needed
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 132).
First Actions for a UN 2264 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 2264 — N,N-DimethylcyclohexylamineHAZMAT RADIO NOTE — UN 2264
Product: N,N-Dimethylcyclohexylamine
Class 8 / Corrosive / ERG 132
PPE: Level B minimum with chemical-resistant suit; SCBA required; neoprene or butyl rubber gloves
ISOLATION: ERG 132: Isolate spill 50m in all directions; for large spill isolate 150m initially, evacuate downwind as needed
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 2264 — N,N-Dimethylcyclohexylamine
Class: 8 | Placard: Corrosive | ERG Guide: 132
Appearance: Clear to pale yellow liquid with an amine-like, fishy odor. Corrosive liquid at room temperature.
Water Reactivity: Reacts exothermically with water; may produce heat and corrosive solutions
Extinguishing: Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers
PPE: Level B minimum with chemical-resistant suit; SCBA required; neoprene or butyl rubber gloves
Isolation: ERG 132: Isolate spill 50m in all directions; for large spill isolate 150m initially, evacuate downwind as needed
— 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/2264 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2264 N,N-Dimethylcyclohexylamine Cls8 ERG132 | allfirefighter.com/hazmat/un/2264SMS / 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/2264
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Frequently Asked Questions about UN 2264
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 with chemical-resistant suit; SCBA required; neoprene or butyl rubber gloves
Water reactivity: Reacts exothermically with water; may produce heat and corrosive solutions. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers.
ERG Guide 132 recommendation: ERG 132: Isolate spill 50m in all directions; for large spill isolate 150m initially, evacuate downwind as needed
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.