☣️ UN 0159 • CLASS 1
Powder cake, wetted
Placard: Explosive 1.3C. 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 0159
Class: 1
Placard type: Explosive 1.3C
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: isolate 500m all directions; if fire or large spill, evacuate 1600m radius; keep material wet
Chemical & Response Details
| Also known as | Powder cakeWetted powder cakeDampened explosive powderMoistened propellant powder |
| Appearance | Compressed cake or block of explosive powder wetted with water or alcohol to reduce sensitivity. Typically gray to black solid material with dampened surface. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (explosive solid) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Desensitized by water; drying increases explosion hazard |
| Extinguishing | Water fog or spray to keep wet; no foam on dry material |
| PPE | ⚠️ Level B minimum with structural firefighting gear; SCBA required; remote operations preferred |
| Isolation | ERG 112: isolate 500m all directions; if fire or large spill, evacuate 1600m radius; keep material wet |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Fire and burning hazard — not mass explosion.
- Intense heat and possible fragment projection.
- May deflagrate and initiate other materials.
- Smoke and toxic combustion products.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper.
- Isolate area; stage upwind — fire and fragment hazard.
- Request Hazmat + law enforcement.
- Control ignition sources; deny entry.
- Consult current ERG Guide 112 and follow SOP/SOG.
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UN 0159 — Powder cake, wetted HAZMAT RADIO NOTE — UN 0159
Product: Powder cake, wetted
Class 1 / Explosive 1.3C / ERG 112
PPE: Level B minimum with structural firefighting gear; SCBA required; remote operations preferred
ISOLATION: ERG 112: isolate 500m all directions; if fire or large spill, evacuate 1600m radius; keep material wet
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 0159 — Powder cake, wetted
Class: 1 | Placard: Explosive 1.3C | ERG Guide: 112
Appearance: Compressed cake or block of explosive powder wetted with water or alcohol to reduce sensitivity. Typically gray to black solid material with dampened surface.
Water Reactivity: Desensitized by water; drying increases explosion hazard
Extinguishing: Water fog or spray to keep wet; no foam on dry material
PPE: Level B minimum with structural firefighting gear; SCBA required; remote operations preferred
Isolation: ERG 112: isolate 500m all directions; if fire or large spill, evacuate 1600m radius; keep material wet
— Key Hazards —
• Fire and burning hazard — not mass explosion.
• Intense heat and possible fragment projection.
• May deflagrate and initiate other materials.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper.
• Isolate area; stage upwind — fire and fragment hazard.
• Request Hazmat + law enforcement.
• Control ignition sources; deny entry.
SOURCE: allfirefighter.com/hazmat/un/0159 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0159 Powder cake, wetted Cls1 ERG112 | ERG 112: isolate 500m all directions; if fire or large spill, evacuate 1600m rad | allfirefighter.com/hazmat/un/0159SMS / 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/0159
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
Fire and burning hazard — not mass explosion. Intense heat and possible fragment projection. May deflagrate and initiate other materials. Smoke and toxic combustion products.
CALL 911. Then call emergency response telephone number on shipping paper. Isolate area; stage upwind — fire and fragment hazard. Request Hazmat + law enforcement.
Level B minimum with structural firefighting gear; SCBA required; remote operations preferred
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.