☣️ UN 0192 • CLASS 1
Signals, railway track, explosive
Placard: Explosive 1.1G. 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.
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Quick details
UN 0192
Class: 1
Placard type: Explosive 1.1G
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions. If fire or spill involves quantities greater than 50 kg, increase isolation distance to 800m (2500 ft). Evacuate 1600m (1 mile) if fire involves large quantities.
Chemical & Response Details
| Also known as | Railway detonatorsTrack torpedoesRailroad track signalsExplosive warning devicesTrain warning signals |
| Appearance | Small metal or plastic devices containing primary explosives, typically cylindrical or disc-shaped, designed to be clamped onto railway tracks. Often reddish-brown or metallic in appearance. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid explosive device) |
| Water Reactivity | No significant reaction with water, but remains explosive when wet |
| Extinguishing | Do not fight fire involving explosives; evacuate area immediately. If small fire in early stages: water from distance acceptable |
| PPE | ⚠️ Full structural firefighters' protective clothing provides limited protection. Evacuate area and fight fire from maximum distance. SCBA and full protective gear mandatory if approach necessary. |
| Isolation | ERG 112: Isolate 500m (1600 ft) in all directions. If fire or spill involves quantities greater than 50 kg, increase isolation distance to 800m (2500 ft). Evacuate 1600m (1 mile) if fire involves large quantities. |
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 0192 — Signals, railway track, explosive HAZMAT RADIO NOTE — UN 0192
Product: Signals, railway track, explosive
Class 1 / Explosive 1.1G / ERG 112
PPE: Full structural firefighters' protective clothing provides limited protection. Evacuate area and fight fire from maximum distance. SCBA and full protective gear mandatory if approach necessary.
ISOLATION: ERG 112: Isolate 500m (1600 ft) in all directions. If fire or spill involves quantities greater than 50 kg, increase isolation distance to 800m (2500 ft). Evacuate 1600m (1 mile) if fire involves large quantities.
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 0192 — Signals, railway track, explosive
Class: 1 | Placard: Explosive 1.1G | ERG Guide: 112
Appearance: Small metal or plastic devices containing primary explosives, typically cylindrical or disc-shaped, designed to be clamped onto railway tracks. Often reddish-brown or metallic in appearance.
Water Reactivity: No significant reaction with water, but remains explosive when wet
Extinguishing: Do not fight fire involving explosives; evacuate area immediately. If small fire in early stages: water from distance acceptable
PPE: Full structural firefighters' protective clothing provides limited protection. Evacuate area and fight fire from maximum distance. SCBA and full protective gear mandatory if approach necessary.
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions. If fire or spill involves quantities greater than 50 kg, increase isolation distance to 800m (2500 ft). Evacuate 1600m (1 mile) if fire involves large quantities.
— 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/0192 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0192 Signals, railway track, explosive Cls1 ERG112 | allfirefighter.com/hazmat/un/0192SMS / 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/0192
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 firefighters' protective clothing provides limited protection. Evacuate area and fight fire from maximum distance. SCBA and full protective gear mandatory if approach necessary.
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.