☣️ UN 0498 • CLASS 1
Propellant, solid
Placard: Explosive 1.1C. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 0498
Class: 1
Placard type: Explosive 1.1C
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill
Chemical & Response Details
| Also known as | Solid rocket propellantComposite propellantRocket motor propellantSolid fuel propellant |
| Appearance | Typically a rubbery or hard solid material, gray to black in color, odorless or with slight chemical odor. Remains solid at room temperature and is designed to burn rapidly when ignited. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, but water should not be used for firefighting due to explosion hazard |
| Extinguishing | DO NOT use water, foam, or any extinguishing agent; flooding of fire area may be necessary from safe distance |
| PPE | ⚠️ Full structural firefighting protective clothing provides limited protection; fragment protection recommended; withdraw immediately if involved in fire |
| Isolation | ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
First actions (field-minded)
- 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.
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UN 0498 — Propellant, solid HAZMAT RADIO NOTE — UN 0498
Product: Propellant, solid
Class 1 / Explosive 1.1C / ERG 112
PPE: Full structural firefighting protective clothing provides limited protection; fragment protection recommended; withdraw immediately if involved in fire
ISOLATION: ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 0498 — Propellant, solid
Class: 1 | Placard: Explosive 1.1C | ERG Guide: 112
Appearance: Typically a rubbery or hard solid material, gray to black in color, odorless or with slight chemical odor. Remains solid at room temperature and is designed to burn rapidly when ignited.
Water Reactivity: No significant reaction with water, but water should not be used for firefighting due to explosion hazard
Extinguishing: DO NOT use water, foam, or any extinguishing agent; flooding of fire area may be necessary from safe distance
PPE: Full structural firefighting protective clothing provides limited protection; fragment protection recommended; withdraw immediately if involved in fire
Isolation: ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill
— Key Hazards —
• Mass explosion hazard — entire load may detonate simultaneously.
• Severe blast overpressure and fragmentation.
• Sensitive to heat, shock, and friction.
— First Actions —
• 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.
SOURCE: allfirefighter.com/hazmat/un/0498 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0498 Propellant, solid Cls1 ERG112 | ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation | allfirefighter.com/hazmat/un/0498SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/0498
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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FAQ
Mass explosion hazard — entire load may detonate simultaneously. Severe blast overpressure and fragmentation. Sensitive to heat, shock, and friction. Secondary fire and debris hazard.
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.
Full structural firefighting protective clothing provides limited protection; fragment protection recommended; withdraw immediately if involved in fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 112 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.