UN 0186 — Rocket motors
Placard: Explosive 1.3C. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0186 is Rocket motors, a Class 1 explosive article assigned to ERG Guide 112. It is primarily a fire and deflagration hazard, with intense heat, smoke and possible fragment projection if ignited.
Hazard overview: UN 0186 can burn or deflagrate with intense heat, flame, smoke and possible thrust or fragment projection. Rocket motors, propellant sections and expelling charges can behave unpredictably when heated or damaged, and nearby ammunition or explosives may increase the incident severity.
Response guidance: For a UN 0186 incident, responders should confirm the item using shipping papers, markings and ERG Guide 112. Isolate the area, avoid projection and exhaust paths, stay upwind, protect exposures only from a safe remote position and withdraw if fire involves the motor, charge or packaged articles.
Firefighter training notes: Training should emphasize pyrotechnic and propellant fire behavior, fragment or thrust potential, smoke hazards and the risk of initiating nearby explosive articles. Common errors include approaching through smoke, standing in projection paths, underestimating packaged quantities and failing to expand isolation when fire spreads.
Regulatory context: Rocket motors is regulated as a Class 1 explosive article. Transportation, storage, quantity and fire code requirements may apply depending on packaging and jurisdiction. Responders should verify current requirements through shipping papers, product documents and applicable DOT, ATF, OSHA, NFPA or local authority guidance.
Storage & handling: Rocket motors should be stored in approved packaging or explosive storage areas away from heat, sparks, flame, friction, incompatible explosives and unauthorized access. Keep packages dry, protected from physical damage and segregated according to explosive compatibility requirements.
UN 0186 Quick Details
Common Hazards of UN 0186
- Fire and deflagration hazard; rocket motors or charges may burn intensely and project fragments.
- Burning propellant can produce extreme heat, flame, thrust, smoke and toxic combustion products.
- Items may move, rupture or project debris if heated or damaged.
- May ignite nearby combustibles, ammunition, pyrotechnics or explosive articles.
- Not normally a mass explosion hazard when transported as classified, but large quantities can create severe fire exposure.
- Fire involvement may require expanded evacuation and remote operations.
Chemical Identity & Physical Properties
Metal cylindrical assemblies containing solid propellant fuel, typically gray or black in color. Contains composite propellant materials with oxidizer and fuel binder in a solid matrix.
| Also known as | Rocket motor assembliesSolid propellant rocket motorsRocket propulsion unitsRocket engines |
| Appearance | Metal cylindrical assemblies containing solid propellant fuel, typically gray or black in color. Contains composite propellant materials with oxidizer and fuel binder in a solid matrix. |
| Flash Point | Not applicable (solid propellant device) |
| Boiling Point | Not applicable (solid propellant device) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | No significant reaction with water, though water cooling may be used on casings |
Fireground Response Guidance — UN 0186
Extinguishing Media
PPE Requirements
Responders should use structural firefighting gear with SCBA for smoke or fire exposure and maintain standoff distance from burning articles or packages. PPE does not replace evacuation if additional explosives or large quantities are involved.
Isolation & Evacuation
First Actions for a UN 0186 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away and deny entry.
- Stage upwind and avoid smoke from burning pyrotechnic, propellant or explosive material.
- Eliminate ignition sources if it is safe to do so.
- Isolate the area and check for nearby explosives, ammunition, rockets, propellants or pyrotechnic articles.
- Do not stand in line with rocket motors, exhaust paths, warheads or possible projection directions.
- Protect exposures only from a safe distance if directed by incident command.
- Use ERG Guide 112, shipping papers and incident command to set isolation and evacuation distances.
📋 Copy & Share Field Card
UN 0186 — Rocket motorsUse 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.