☣️ UN 3364 • CLASS 4
UN 3364 — Trinitrophenol, wetted with not less than 10% water
Placard: Flammable Solid. ERG Guide 113. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
Trinitrophenol, wetted with not less than 10% water is shipped wetted to reduce explosive sensitivity. The water content is a critical safety control.
Hazard overview: The material may burn and can become explosive if it dries out or is exposed to heat, flame, friction or shock. Toxic decomposition products may be produced in fire.
Response guidance: Keep the material wet, avoid friction or impact and treat any dried residue as explosive. Isolate the area and follow ERG 113 or explosive guidance if fire is involved.
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UN 3364 Quick Details
UN 3364
Product name: Trinitrophenol, wetted with not less than 10% water
DOT Class: 4
Placard type: Flammable Solid
ERG Guide: 113 (check current ERG)
Initial isolation: ERG 113: isolate 800m all directions for large spill; evacuate 1600m downwind if fire; treat dried material as explosive
Common Hazards of UN 3364
- 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 dried material as an explosive.
- 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.
- Contact may cause burns to skin and eyes.
- Fire may produce irritating, corrosive and/or toxic gases.
Chemical Identity & Physical Properties
Yellow crystalline solid with a bitter taste. Odorless or slight aromatic odor. Wetted with water to reduce explosive hazard.
| Also known as | Picric acid2,4,6-TrinitrophenolTNPPicronitric acidCarbazotic acidMelinite |
| CAS Number | 88-89-1 |
| Appearance | Yellow crystalline solid with a bitter taste. Odorless or slight aromatic odor. Wetted with water to reduce explosive hazard. |
| Flash Point | Not applicable (explosive solid when dry) |
| Boiling Point | Explodes above 300C (572F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; wetting with water is safety measure to prevent detonation |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3364
Extinguishing Media
Water spray or fog preferred to keep wetted; avoid dry chemicals that may cause friction
PPE Requirements
⚠️ Level B minimum with SCBA; full face protection; avoid all ignition sources and mechanical shock
Use SCBA, full protective clothing and face protection; keep distance and avoid handling dried or contaminated residue.
Isolation & Evacuation
ERG 113: isolate 800m all directions for large spill; evacuate 1600m downwind if fire; treat dried material as explosive
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 113).
First Actions for a UN 3364 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- 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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📋 Copy & Share Field Card
UN 3364 — Trinitrophenol, wetted with not less thaHAZMAT RADIO NOTE — UN 3364
Product: Trinitrophenol, wetted with not less than 10% water
Class 4 / Flammable Solid / ERG 113
PPE: Level B minimum with SCBA; full face protection; avoid all ignition sources and mechanical shock
ISOLATION: ERG 113: isolate 800m all directions for large spill; evacuate 1600m downwind if fire; treat dried material as explosive
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 3364 — Trinitrophenol, wetted with not less than 10% water
Class: 4 | Placard: Flammable Solid | ERG Guide: 113
Appearance: Yellow crystalline solid with a bitter taste. Odorless or slight aromatic odor. Wetted with water to reduce explosive hazard.
Water Reactivity: Soluble in water; wetting with water is safety measure to prevent detonation
Extinguishing: Water spray or fog preferred to keep wetted; avoid dry chemicals that may cause friction
PPE: Level B minimum with SCBA; full face protection; avoid all ignition sources and mechanical shock
Isolation: ERG 113: isolate 800m all directions for large spill; evacuate 1600m downwind if fire; treat dried material as explosive
— 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 dried material as an explosive.
— First Actions —
• CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
• 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/trinitrophenol-wetted-with-not-un-3364 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3364 Trinitrophenol, wetted with not less than 10% water Cls4 ERG113 | allfirefighter.com/hazmat/un/trinitrophenol-wetted-with-not-un-3364SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/trinitrophenol-wetted-with-not-un-3364
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Frequently Asked Questions about UN 3364
UN 3364 is the entry for Trinitrophenol, wetted with not less than 10% water.
Water reduces sensitivity and helps prevent explosive behavior from drying.
Dried material may become explosive if heated, shocked, struck or exposed to friction.
Water spray or fog may be used to keep material wet; avoid actions that spread contamination or cause impact.
SCBA and full protective clothing are required; responders should maintain distance due to explosive potential.
ERG Guide 113 applies initially, with explosive guidance if material is dry or fire-involved.
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.