UN 0190 — Samples, explosive
Placard: Explosive 1.1A. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0190 covers explosive samples handled in small quantities for testing, research, or quality control purposes, classified under Division 1.1A due to their mass explosion potential. These samples may present in solid, powder, or liquid form and are capable of simultaneous detonation of the entire load.
Hazard overview: UN 0190 presents a mass explosion hazard, meaning the entire quantity may detonate simultaneously, producing severe blast overpressure and fragmentation. These explosive samples are sensitive to heat, shock, and friction, making any disturbance during an incident extremely dangerous.
Response guidance: Emergency responders should isolate a minimum of 500 meters (1,600 feet) in all directions and evacuate up to 1,600 meters (1 mile) if fire or a projection hazard exists, per ERG Guide 112. Water and foam should not be applied unless fire cannot be controlled, in which case flooding quantities of water from a maximum safe distance may be used.
UN 0190 Quick Details
Common Hazards of UN 0190
- 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
UN 0190 samples vary in physical appearance and may be encountered as solids, powders, or liquids, typically in small quantities associated with testing or research activities.
| Appearance | Variable appearance depending on sample type; may be solid, powder, or liquid form; typically handled in small quantities for testing, research, or quality control purposes. |
| Flash Point | Not applicable (explosive material) |
| Boiling Point | Not applicable (explosive material) |
| Vapor Density | Not applicable (variable composition) |
| Water Reactivity | Variable depending on sample composition; avoid water contact unless sample characteristics are known |
Fireground Response Guidance — UN 0190
Extinguishing Media
PPE Requirements
Responders must wear Level B protection minimum with blast-resistant equipment and SCBA, use remote handling equipment whenever possible, and maintain maximum standoff distance from UN 0190 samples at all times.
Isolation & Evacuation
First Actions for a UN 0190 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 0190 — Samples, explosiveUse 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.