☣️ UN 1356 • CLASS 4
Trinitrotoluene, wetted with not less than 30% water
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 1356
Class: 4
Placard type: Flammable Solid
ERG: Guide 113 (check current ERG)
Isolation: ERG 113: Isolate spill/leak area immediately for at least 100m in all directions; if fire involved, isolate 800m in all directions and consider evacuation for 1600m downwind
Chemical & Response Details
| Also known as | TNT2,4,6-TrinitrotolueneTrotylTriliteToliteTriton |
| CAS Number | 118-96-7 |
| Appearance | Pale yellow to light brown crystalline solid when dry, appears as wet mass or slurry when wetted with water. Odorless or faint aromatic odor. |
| Flash Point | Not applicable (wetted explosive solid) |
| Boiling Point | Decomposes at approximately 240C (464F) before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water; water acts as desensitizer and prevents detonation |
| Extinguishing | Water spray to keep wet, dry chemical for small fires; DO NOT allow to dry out |
| PPE | ⚠️ Level B minimum with full face SCBA; structural firefighter protective clothing provides limited protection; avoid all contact with dried material |
| Isolation | ERG 113: Isolate spill/leak area immediately for at least 100m in all directions; if fire involved, isolate 800m in all directions and consider evacuation for 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 1356 — Trinitrotoluene, wetted with not less th HAZMAT RADIO NOTE — UN 1356
Product: Trinitrotoluene, wetted with not less than 30% water
Class 4 / Flammable Solid / ERG 113
PPE: Level B minimum with full face SCBA; structural firefighter protective clothing provides limited protection; avoid all contact with dried material
ISOLATION: ERG 113: Isolate spill/leak area immediately for at least 100m in all directions; if fire involved, isolate 800m in all directions and consider evacuation for 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 1356 — Trinitrotoluene, wetted with not less than 30% water
Class: 4 | Placard: Flammable Solid | ERG Guide: 113
Appearance: Pale yellow to light brown crystalline solid when dry, appears as wet mass or slurry when wetted with water. Odorless or faint aromatic odor.
Water Reactivity: No significant reaction with water; water acts as desensitizer and prevents detonation
Extinguishing: Water spray to keep wet, dry chemical for small fires; DO NOT allow to dry out
PPE: Level B minimum with full face SCBA; structural firefighter protective clothing provides limited protection; avoid all contact with dried material
Isolation: ERG 113: Isolate spill/leak area immediately for at least 100m in all directions; if fire involved, isolate 800m in all directions and consider evacuation for 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/1356 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1356 Trinitrotoluene, wetted with not less than 30% water Cls4 ERG113 | allfirefighter.com/hazmat/un/1356SMS / 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/1356
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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 full face SCBA; structural firefighter protective clothing provides limited protection; avoid all contact with dried material
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.