☣️ UN 0498 • CLASS 1

UN 0498 — Propellant, solid

Placard: Explosive 1.1C. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.

🚒☣️
⚠️ 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.

UN 0498 solid propellant is a rubbery or hard solid material, gray to black in color, odorless or with slight chemical odor, designed to burn rapidly when ignited. It remains solid at room temperature and is highly explosive.

Hazard overview: UN 0498 solid propellant poses a mass explosion hazard, with the entire load potentially detonating simultaneously, and severe blast overpressure and fragmentation can occur. The explosive material can cause catastrophic damage if not handled properly.

Response guidance: In case of an emergency, isolate the area 800m in all directions and consider initial evacuation for 1600m if fire or major spill occurs. Do not use water, foam, or any extinguishing agent, and flooding of the fire area may be necessary from a safe distance.

Advertisement

UN 0498 Quick Details

UN 0498
Product name: Propellant, solid
DOT Class: 1
Placard type: Explosive 1.1C
ERG Guide: 112 (check current ERG)
Initial isolation: ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill

Common Hazards of UN 0498

  • 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 0498 solid propellant is a rubbery or hard solid material, gray to black in color, odorless or with slight chemical odor, designed to burn rapidly when ignited.

Also known asSolid rocket propellantComposite propellantRocket motor propellantSolid fuel propellant
AppearanceTypically 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 PointNot applicable (explosive solid)
Boiling PointNot applicable (decomposes explosively)
Vapor DensityNot applicable (solid)
Water ReactivityNo significant reaction with water, but water should not be used for firefighting due to explosion hazard
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 0498

Extinguishing Media

DO NOT use water, foam, or any extinguishing agent; flooding of fire area may be necessary from safe distance

PPE Requirements

⚠️ Full structural firefighting protective clothing provides limited protection; fragment protection recommended; withdraw immediately if involved in fire

Full structural firefighting protective clothing provides limited protection against UN 0498 solid propellant, and fragment protection is recommended.

Isolation & Evacuation

ERG 112: Isolate 800m (1/2 mile) in all directions; consider initial evacuation for 1600m (1 mile) if fire or major spill
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 112).

First Actions for a UN 0498 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.
Advertisement

📋 Copy & Share Field Card

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.

SMS WhatsApp
=== 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.

SMS (short)
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.

⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/propellant-solid-un-0498

Related UN Numbers in Class 1

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
Advertisement

Frequently Asked Questions about UN 0498

Yes, UN 0498 solid propellant poses a mass explosion hazard, with the entire load potentially detonating simultaneously.

Isolate the area 800m in all directions and consider initial evacuation for 1600m if fire or major spill occurs.

No, water should not be used to extinguish fires involving UN 0498 solid propellant, as it can cause explosion or fragmentation.
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.