UN 1650 — Naphthylamine (beta), solid
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1650 is Naphthylamine (beta), solid, a toxic aromatic amine solid assigned to ERG Guide 153. Dust and skin contact are major concerns, and beta-naphthylamine is associated with serious carcinogenic hazard.
Hazard overview: UN 1650 presents toxic dust, skin absorption and carcinogenic contamination hazards. It may burn under fire conditions and produce toxic nitrogen-containing smoke.
Response guidance: For a UN 1650 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 153. Establish incident command, isolate the area, stay upwind, prevent dust or vapor exposure, control runoff and choose entry or cleanup actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1650 should emphasize carcinogenic aromatic amine dust, skin absorption, contamination control, SCBA use and runoff containment. Use ERG 153, SDS and local SOP.
Regulatory context: Naphthylamine (beta), solid is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Naphthylamine (beta), solid should be stored in tightly closed compatible containers in a secure toxic-material area according to SDS and local hazardous materials procedures.
UN 1650 Quick Details
Common Hazards of UN 1650
- TOXIC aromatic amine solid; inhalation, ingestion or skin absorption may cause severe injury.
- Known or suspected carcinogenic hazard; avoid dust and all skin contact.
- Combustible solid: may burn but does not ignite readily.
- Dust or molten material may injure eyes, skin and respiratory tissue.
- Fire may produce toxic nitrogen oxides and irritating smoke.
- Runoff may carry toxic contamination to drains or waterways.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
White to reddish crystalline solid with a faint aromatic odor. Darkens on exposure to air and light.
| Also known as | 2-Naphthylaminebeta-Naphthylamine2-AminonaphthaleneNaphthalen-2-amine |
| CAS Number | 91-59-8 |
| Appearance | White to reddish crystalline solid with a faint aromatic odor. Darkens on exposure to air and light. |
| Flash Point | 157°C (315°F) |
| Boiling Point | 306°C (583°F) |
| Vapor Density | 5.0 (heavier than air) |
| Water Reactivity | No significant reaction with water, but slightly soluble |
Fireground Response Guidance — UN 1650
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid all skin contact and contaminated dust because of carcinogenic and toxic hazards.
Isolation & Evacuation
First Actions for a UN 1650 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Avoid breathing vapors, fumes, dust or mist and avoid all skin or eye contact.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Avoid creating dust clouds or spreading contaminated liquid, powder, solution, runoff or debris.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or leak area and expand the perimeter if dust, vapor, fire involvement or unknown concentration is present.
- Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1650 — Naphthylamine (beta), solidUse 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.