☣️ UN 0150 • CLASS 1
Pentaerythrite tetranitrate, wetted; PETN
Placard: Explosive 1.1D. 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 0150
Class: 1
Placard type: Explosive 1.1D
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Initial isolation 500m in all directions; protective action distance 1600m downwind if fire; consider mass evacuation for large quantities
Chemical & Response Details
| Also known as | PETNPentaerythritol tetranitrateNitropentaPenthriteCorpent |
| CAS Number | 78-11-5 |
| Appearance | White crystalline solid or wetted paste/slurry. Odorless or slight characteristic odor. Typically shipped wetted with water or alcohol to reduce sensitivity. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes/explodes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No reaction with water; water is used as desensitizer/phlegmatizer |
| Extinguishing | Do not fight fire when in explosive form; flooding amounts of water from distance if wetted material |
| PPE | ⚠️ Level A or B with full structural firefighting gear; SCBA mandatory; approach from upwind/uphill only |
| Isolation | ERG 112: Initial isolation 500m in all directions; protective action distance 1600m downwind if fire; consider mass evacuation for 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 0150 — Pentaerythrite tetranitrate, wetted; PET HAZMAT RADIO NOTE — UN 0150
Product: Pentaerythrite tetranitrate, wetted; PETN
Class 1 / Explosive 1.1D / ERG 112
PPE: Level A or B with full structural firefighting gear; SCBA mandatory; approach from upwind/uphill only
ISOLATION: ERG 112: Initial isolation 500m in all directions; protective action distance 1600m downwind if fire; consider mass evacuation for 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 0150 — Pentaerythrite tetranitrate, wetted; PETN
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: White crystalline solid or wetted paste/slurry. Odorless or slight characteristic odor. Typically shipped wetted with water or alcohol to reduce sensitivity.
Water Reactivity: No reaction with water; water is used as desensitizer/phlegmatizer
Extinguishing: Do not fight fire when in explosive form; flooding amounts of water from distance if wetted material
PPE: Level A or B with full structural firefighting gear; SCBA mandatory; approach from upwind/uphill only
Isolation: ERG 112: Initial isolation 500m in all directions; protective action distance 1600m downwind if fire; consider mass evacuation for 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/0150 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0150 Pentaerythrite tetranitrate, wetted; PETN Cls1 ERG112 | allfirefighter.com/hazmat/un/0150SMS / 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/0150
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 or B with full structural firefighting gear; SCBA mandatory; approach from upwind/uphill only
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.