☣️ 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.

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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.

UN 0498 is Propellant, solid, a Class 1.1C explosive entry assigned to ERG Guide 112. This entry requires isolation, evacuation and qualified explosive specialist support as primary responder priorities.

Hazard overview: UN 0498 presents a serious explosive hazard when exposed to fire, impact, shock, friction or other initiating conditions. Depending on division and quantity, detonation or projection may create severe blast, fragmentation and secondary debris hazards.

Response guidance: For a UN 0498 incident, responders should confirm the material using shipping papers, placards, package markings, SDS where applicable and ERG Guide 112. Establish incident command, isolate the area, deny entry, request law enforcement and EOD support, and withdraw personnel if fire involves the explosive material or containers.

Firefighter training notes: Training should emphasize recognizing Class 1 explosive placards, establishing command early, using standoff distance, denying entry and requesting bomb squad or EOD support. Common tactical errors include approaching packages for identification, moving damaged items, fighting fire too close and underestimating fragmentation distance. Use ERG 112, shipping papers and local explosive incident SOP.

Regulatory context: Propellant, solid 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: Propellant, solid 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.

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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; the entire load may detonate simultaneously if initiated.
  • Severe blast overpressure, fragmentation and debris may extend far beyond the immediate container or vehicle.
  • Explosive articles or substances may be sensitive to heat, shock, friction, impact or fire exposure.
  • Fire involving the material can transition rapidly to detonation without reliable warning.
  • Secondary fires, projectiles and container fragments may create hazards after an initial event.
  • Smoke from fire may contain irritating or toxic combustion products.

Chemical Identity & Physical Properties

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.

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 fight fire involving explosives at close range. Use unmanned master streams or remote cooling only if directed by incident command and safe under local SOP.

PPE Requirements

⚠️ No standard PPE protects against blast and fragmentation. Use distance, cover, evacuation, SCBA for smoke exposure and EOD/bomb squad support for any approach.

For UN 0498, distance, cover and evacuation are more important than close-range PPE. Structural firefighting gear and SCBA may be used only for remote exposure protection or support roles; direct approach or handling should be limited to qualified EOD or explosive specialists under incident command.

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 the emergency response telephone number on the shipping paper, if available.
  • Keep unauthorized personnel away and deny entry to the hazard area.
  • Stage responders upwind, uphill and outside the recommended isolation distance.
  • Request law enforcement, bomb squad or EOD, hazmat and additional command resources immediately.
  • Do not handle, move or disturb explosive articles unless directed by qualified explosive ordnance personnel.
  • Do not fight fire involving explosives at close range; withdraw and protect life safety first.
  • Protect exposures only from a safe, remote position if directed by incident command and local SOP.
  • Use ERG Guide 112, shipping papers and incident command to set isolation and evacuation distances.
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📋 Copy & Share Field Card

UN 0498 — Propellant, solid
HAZMAT RADIO NOTE — UN 0498 Product: Propellant, solid Class 1 / Explosive 1.1C / ERG 112 PPE: No standard PPE protects against blast and fragmentation. Use distance, cover, evacuation, SCBA for smoke exposure and EOD/bomb squad support for any approach. 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 fight fire involving explosives at close range. Use unmanned master streams or remote cooling only if directed by incident command and safe under local SOP. PPE: No standard PPE protects against blast and fragmentation. Use distance, cover, evacuation, SCBA for smoke exposure and EOD/bomb squad support for any approach. 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; the entire load may detonate simultaneously if initiated. • Severe blast overpressure, fragmentation and debris may extend far beyond the immediate container or vehicle. • Explosive articles or substances may be sensitive to heat, shock, friction, impact or fire exposure. — First Actions — • CALL 911. Then call the emergency response telephone number on the shipping paper, if available. • Keep unauthorized personnel away and deny entry to the hazard area. • Stage responders upwind, uphill and outside the recommended isolation distance. • Request law enforcement, bomb squad or EOD, hazmat and additional command resources immediately. SOURCE: allfirefighter.com/hazmat/un/propellant-solid-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 | allfirefighter.com/hazmat/un/propellant-solid-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.
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Frequently Asked Questions about UN 0498

UN 0498 is Propellant, solid, a Class 1 explosive entry assigned to ERG Guide 112.

UN 0498 may present a mass explosion hazard depending on division, quantity and conditions. Responders should use ERG 112 and treat fire involvement as high consequence.

ERG Guide 112 applies to UN 0498 and should be used for initial isolation, evacuation and first response decisions.

The main hazards are blast or projection effects, fragmentation, fire involvement, heat or shock sensitivity and secondary smoke or debris hazards.

PPE depends on division, fire involvement and product condition. Structural gear with SCBA may protect from smoke or fire exposure, but distance, cover, isolation and specialist explosive support are the key controls.

Keep people away, stage upwind and outside the isolation zone, avoid moving the material, request law enforcement or EOD support when appropriate and follow ERG 112, shipping papers and incident command.
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.