UN 2660 — Nitrotoluidines (mono)
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2660 is Nitrotoluidines (mono), a toxic aromatic amine entry assigned to ERG Guide 153. Skin absorption and exact form/isomer review are important.
Hazard overview: TOXIC aromatic amine material; inhalation, ingestion or skin absorption may cause serious injury. Skin contact and contaminated clothing are major exposure concerns. Combustible solid/liquid: may burn but does not ignite readily.
Response guidance: For UN 2660, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Prevent spread of contaminated runoff, cool containers from protection and verify controls with SDS and ERG 153.
Firefighter training notes: Training for UN 2660 should emphasize toxic exposure routes, skin absorption, SCBA use, dust/vapor control, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: Nitrotoluidines (mono) is regulated as a hazardous material for transport and emergency response. Storage, exposure, spill reporting, waste and fire-code duties depend on quantity, concentration and jurisdiction; verify shipping papers, SDS and local authority requirements.
Storage & handling: Nitrotoluidines (mono) should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2660 Quick Details
Common Hazards of UN 2660
- TOXIC aromatic amine material; inhalation, ingestion or skin absorption may cause serious injury.
- Skin contact and contaminated clothing are major exposure concerns.
- Combustible solid/liquid: may burn but does not ignite readily.
- Heating or fire may produce nitrogen oxides and toxic aromatic amine smoke.
- Molten material, if present, can cause thermal and toxic contact exposure.
- Runoff may carry toxic amine contamination.
- Exact isomer/form and physical state should be verified from SDS.
Chemical Identity & Physical Properties
Yellow to orange-brown crystalline solid or powder at room temperature. May have a slight aromatic odor. Toxic by all routes of exposure.
| Also known as | mononitrotoluidinesnitrotoluidine isomersaminonitrotoluenenitromethylaniline |
| Appearance | Yellow to orange-brown crystalline solid or powder at room temperature. May have a slight aromatic odor. Toxic by all routes of exposure. |
| Flash Point | Not applicable (combustible solid) |
| Boiling Point | Varies by isomer, typically 250-280C (482-536F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, but slightly soluble |
Fireground Response Guidance — UN 2660
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 2660 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Prevent contaminated dust, liquid, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2660 — Nitrotoluidines (mono)Use 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.