UN 2565 — Dicyclohexylamine
Placard: Corrosive. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Dicyclohexylamine is a corrosive amine liquid shipped as UN 2565. It can burn when heated and can cause serious injury through vapor, mist or direct contact.
Hazard overview: Dicyclohexylamine can cause severe skin and eye burns and respiratory irritation. Fire can produce toxic nitrogen oxide fumes, and spill runoff may be alkaline and corrosive.
Response guidance: Isolate the spill, prevent contact and contain runoff. Use alcohol-resistant foam, dry chemical, CO2 or water spray for fire and container cooling as conditions allow.
Firefighter training notes: Train crews on corrosive amine response, decon and alkaline runoff control. Include vapor monitoring and container cooling tactics.
Regulatory context: UN 2565 is transported as Dicyclohexylamine, Class 8 corrosive. Confirm quantity, packaging and emergency contact information.
Storage & handling: Store in closed containers in a cool, ventilated corrosive/combustible liquid area away from acids, oxidizers and heat.
UN 2565 Quick Details
Common Hazards of UN 2565
- Dicyclohexylamine is corrosive; skin or eye contact can cause severe burns.
- Inhalation of vapor or mist can irritate or damage the respiratory tract.
- It is combustible and may burn when heated or exposed to flame.
- Fire may produce toxic nitrogen oxide fumes and irritating smoke.
- Runoff can be alkaline, corrosive and harmful to waterways.
- Vapors may form ignitable mixtures when heated in confined spaces.
- Containers may rupture when heated.
Chemical Identity & Physical Properties
Dicyclohexylamine is a clear to pale yellow liquid with a fishy amine odor. It may solidify near 0°C.
| Also known as | DCHADodecahydrodiphenylamineN-CyclohexylcyclohexanamineBis(cyclohexyl)amine |
| CAS Number | 101-83-7 |
| Appearance | Clear to pale yellow liquid with a fishy amine odor. Solidifies at approximately 0°C (32°F). |
| Flash Point | 99°C (210°F) |
| Boiling Point | 256°C (493°F) |
| Vapor Density | 3.6 (heavier than air) |
| Water Reactivity | No significant reaction with water, but forms alkaline solutions |
Fireground Response Guidance — UN 2565
Extinguishing Media
PPE Requirements
Use SCBA for vapor, mist or fire conditions. Wear chemical-resistant suit, gloves, boots and full eye/face protection.
Isolation & Evacuation
First Actions for a UN 2565 Incident
- Call 911 and the emergency response number on the shipping papers.
- Keep unauthorized personnel away and establish an upwind control area.
- Stay upwind, uphill and upstream of vapor, mist and runoff.
- Avoid breathing vapor or mist; prevent all skin and eye contact.
- Do not touch damaged containers or spilled liquid without chemical-resistant PPE.
- Ventilate confined spaces only with trained personnel, SCBA and monitoring.
- Use ERG 153, SDS and shipping papers for isolation, decon and cleanup decisions.
📋 Copy & Share Field Card
UN 2565 — DicyclohexylamineUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.