UN 0502 — Rockets, with inert head
Placard: Explosive 1.3C. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0502 is Rockets, with inert head, a Class 1.3 explosive entry assigned to ERG Guide 112. It is primarily a fire and deflagration hazard, with heat, smoke and possible fragment projection if ignited.
Hazard overview: UN 0502 is not normally treated as a mass explosion hazard when transported as classified, but it can burn intensely and may project fragments or ignite nearby explosive, propellant or pyrotechnic materials. Smoke can contain irritating or toxic combustion products, and damaged packages may increase the hazard.
Response guidance: For a UN 0502 incident, responders should confirm the article or material using shipping papers, markings, SDS where applicable and ERG Guide 112. Isolate the area, stay upwind, avoid smoke, control ignition sources when safe and determine whether higher-hazard explosives or larger quantities are also present before committing crews.
Firefighter training notes: Training should emphasize pyrotechnic, propellant or explosive fire behavior, smoke hazards, fragment potential and the risk of escalating nearby explosive articles. Common errors include approaching through smoke, disturbing damaged packages and failing to expand isolation when fire spreads.
Regulatory context: Rockets, with inert head is regulated as a Class 1 explosive hazardous material. Transportation, storage, quantity limits, fire code controls and reporting requirements may vary by jurisdiction. Responders should verify current requirements through shipping papers, SDS or product documents and applicable DOT, ATF, OSHA, NFPA, military, state or local authority guidance.
Storage & handling: Rockets, with inert head should be stored only in approved packaging, magazines or authorized explosive storage areas, separated from ignition sources, incompatible materials and unauthorized access. Packages should be protected from heat, impact, friction, moisture where relevant and physical damage according to product documentation and applicable explosive storage regulations.
UN 0502 Quick Details
Common Hazards of UN 0502
- Fire and deflagration hazard; not normally a mass explosion hazard when transported as classified.
- Burning material may produce intense heat, flame, sparks, smoke and localized fragment projection.
- May ignite or initiate nearby pyrotechnic, propellant or explosive materials.
- Smoke may contain irritating or toxic combustion products.
- Heat, flame, sparks, impact or damaged packaging may increase the chance of ignition.
- Fire involvement may require expanded evacuation if other explosives or large quantities are nearby.
Chemical Identity & Physical Properties
Solid rocket motors with inert (non-explosive) warheads; typically cylindrical metal casings containing solid propellant; may vary in size from small practice rounds to large training missiles.
| Also known as | Inert-head rocketsPractice rocketsTraining rocketsNon-explosive head rockets |
| Appearance | Solid rocket motors with inert (non-explosive) warheads; typically cylindrical metal casings containing solid propellant; may vary in size from small practice rounds to large training missiles. |
| Flash Point | Not applicable (explosive/pyrotechnic composition) |
| Boiling Point | Not applicable (solid propellant composition) |
| Vapor Density | Not applicable (solid article) |
| Water Reactivity | Propellant may be water-reactive depending on composition; do not use water directly on burning rockets |
Fireground Response Guidance — UN 0502
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 0502 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, propellants or pyrotechnic articles.
- 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 0502 — Rockets, with inert headUse 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.