☣️ UN 0411 • CLASS 1
PETN, with not less than 7% wax
Placard: Explosive 1.1D. 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 0411
Class: 1
Placard type: Explosive 1.1D
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire; consider withdrawal rather than firefighting; mass detonation risk
Chemical & Response Details
| Also known as | Pentaerythritol tetranitratePenthritePETNNitropentaPentrite |
| CAS Number | 78-11-5 |
| Appearance | White crystalline powder or granular solid, odorless. Desensitized with wax to reduce sensitivity to initiation. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively at 205-215C) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, insoluble |
| Extinguishing | Do not use water or foam — increases mass and shock sensitivity. Use distance and protective shielding. |
| PPE | ⚠️ Level A required for fire involvement; structural firefighting gear inadequate; SCBA mandatory; minimum approach distance; no direct contact with material |
| Isolation | ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire; consider withdrawal rather than firefighting; mass detonation risk |
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 0411 — PETN, with not less than 7% wax HAZMAT RADIO NOTE — UN 0411
Product: PETN, with not less than 7% wax
Class 1 / Explosive 1.1D / ERG 112
PPE: Level A required for fire involvement; structural firefighting gear inadequate; SCBA mandatory; minimum approach distance; no direct contact with material
ISOLATION: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire; consider withdrawal rather than firefighting; mass detonation risk
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 0411 — PETN, with not less than 7% wax
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: White crystalline powder or granular solid, odorless. Desensitized with wax to reduce sensitivity to initiation.
Water Reactivity: No significant reaction with water, insoluble
Extinguishing: Do not use water or foam — increases mass and shock sensitivity. Use distance and protective shielding.
PPE: Level A required for fire involvement; structural firefighting gear inadequate; SCBA mandatory; minimum approach distance; no direct contact with material
Isolation: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire; consider withdrawal rather than firefighting; mass detonation risk
— 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/0411 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0411 PETN, with not less than 7% wax Cls1 ERG112 | allfirefighter.com/hazmat/un/0411SMS / 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/0411
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.
Level A required for fire involvement; structural firefighting gear inadequate; SCBA mandatory; minimum approach distance; no direct contact with material
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.