UN 0282 — Nitroguanidine; Picrite, dry
Placard: Explosive 1.1D. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0282, Nitroguanidine (also known as Picrite, dry), is a Class 1.1D explosive solid classified under ERG Guide 112, capable of mass detonation involving the entire load simultaneously. It presents extreme blast overpressure and fragmentation hazards and is acutely sensitive to heat, shock, and friction.
Hazard overview: The primary hazard of UN 0282 is mass explosion: a single detonation event can consume the entire shipment, generating lethal blast waves and high-velocity fragmentation over a wide radius. Sensitivity to mechanical shock and frictional forces means that even routine handling errors can trigger initiation without warning.
Response guidance: Emergency responders must immediately establish an isolation perimeter of at least 500 meters (1,600 ft) in all directions and evacuate downwind to 1,600 meters (1 mile) if fire or a large spill is involved. Do not attempt firefighting with water or foam; use dry chemical, sand, or dry earth only for small fires, and withdraw immediately for large fires involving this explosive.
UN 0282 Quick Details
Common Hazards of UN 0282
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
Chemical Identity & Physical Properties
Nitroguanidine appears as a white to pale yellow crystalline solid or powder, odorless or with a faint characteristic odor, and remains stable at room temperature when kept dry.
| Also known as | NitroguanidinePicriteNQ1-NitroguanidineNitraminoguanidine |
| CAS Number | 556-88-7 |
| Appearance | White to pale yellow crystalline solid or powder. Odorless or slight characteristic odor. Stable at room temperature when dry. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Decomposes at 232C (450F) before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Slightly soluble in water; no violent reaction but wetting increases density and sensitivity |
Fireground Response Guidance — UN 0282
Extinguishing Media
PPE Requirements
Approaching any incident involving UN 0282 requires Level A full encapsulation, mandatory SCBA, and blast-resistant protective gear when fire exposure is possible.
Isolation & Evacuation
First Actions for a UN 0282 Incident
- CALL 911. Then call emergency response telephone number on shipping paper.
- Establish large isolation zone — minimum 500 meters in all directions.
- Stage upwind, uphill; limit personnel to essential responders only.
- Request Hazmat + law enforcement + additional resources immediately.
- Do not fight fire — evacuate and isolate; let burn if no life safety risk.
- Protect exposures only if safe and directed by command.
- Consult current ERG Guide 112 and follow SOP/SOG.
📋 Copy & Share Field Card
UN 0282 — Nitroguanidine; Picrite, dryUse 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.