☣️ UN 3380 • CLASS 4
Desensitized explosive, solid, n.o.s.
Placard: Flammable Solid. 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 3380
Class: 4
Placard type: Flammable Solid
ERG: Guide 113 (check current ERG)
Isolation: ERG 113: isolate spill area minimum 100m all directions; if material is dry or fire involved, isolate 800m and evacuate 1600m downwind
Chemical & Response Details
| Also known as | Wetted explosive solidPhlegmatized explosiveDesensitized explosive NOSWater-wet explosive material |
| Appearance | Variable appearance depending on the specific explosive compound; typically a solid material wetted or mixed with water, alcohol, or other desensitizing agents to reduce explosion hazard during transport. Color and texture vary by base explosive. |
| Flash Point | Not applicable (desensitized explosive solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | No significant reaction with water when properly desensitized; however, loss of desensitizing agent increases explosion risk |
| Extinguishing | Water spray to keep cool, DO NOT use dry chemicals or CO2; avoid shock or friction |
| PPE | ⚠️ Level B minimum with structural firefighting gear; SCBA mandatory; approach with extreme caution; remote water application preferred |
| Isolation | ERG 113: isolate spill area minimum 100m all directions; if material is dry or fire involved, isolate 800m and evacuate 1600m downwind |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an
- Keep material wet with water or treat as an explosive (GUIDE 112).
- Runoff to sewer may create fire or explosion hazard.
- Some are toxic and may be fatal if inhaled, ingested or absorbed through skin. Specifically,
- Contact may cause burns to skin and eyes.
- Fire may produce irritating, corrosive and/or toxic gases.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area immediately for at least 100 meters (330 feet) in all directions.
- Consider initial evacuation for 500 meters (1/3 mile) in all directions.
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UN 3380 — Desensitized explosive, solid, n.o.s. HAZMAT RADIO NOTE — UN 3380
Product: Desensitized explosive, solid, n.o.s.
Class 4 / Flammable Solid / ERG 113
PPE: Level B minimum with structural firefighting gear; SCBA mandatory; approach with extreme caution; remote water application preferred
ISOLATION: ERG 113: isolate spill area minimum 100m all directions; if material is dry or fire involved, isolate 800m and evacuate 1600m downwind
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 3380 — Desensitized explosive, solid, n.o.s.
Class: 4 | Placard: Flammable Solid | ERG Guide: 113
Appearance: Variable appearance depending on the specific explosive compound; typically a solid material wetted or mixed with water, alcohol, or other desensitizing agents to reduce explosion hazard during transport. Color and texture vary by base explosive.
Water Reactivity: No significant reaction with water when properly desensitized; however, loss of desensitizing agent increases explosion risk
Extinguishing: Water spray to keep cool, DO NOT use dry chemicals or CO2; avoid shock or friction
PPE: Level B minimum with structural firefighting gear; SCBA mandatory; approach with extreme caution; remote water application preferred
Isolation: ERG 113: isolate spill area minimum 100m all directions; if material is dry or fire involved, isolate 800m and evacuate 1600m downwind
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3380 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3380 Desensitized explosive, solid, n.o.s. Cls4 ERG113 | allfirefighter.com/hazmat/un/3380SMS / 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/3380
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FAQ
Flammable/combustible material. May be ignited by heat, sparks or flames. DRIED OUT material may explode if exposed to heat, flame, friction or shock; treat as an Keep material wet with water or treat as an explosive (GUIDE 112). Runoff to sewer may create fire or explosion hazard. Some are toxic and may be fatal if inhaled, ingested or absorbed through skin. Specifically, Contact may cause burns to skin and eyes. Fire may produce irritating, corrosive and/or toxic gases.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum with structural firefighting gear; SCBA mandatory; approach with extreme caution; remote water application preferred
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 113 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.