UN 0118 — Hexolite; Hexotol
Placard: Explosive 1.1D. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0118 identifies Hexolite and Hexotol, a military-grade RDX/TNT composite explosive classified as a Division 1.1D mass explosion hazard. The entire load may detonate simultaneously when exposed to heat, shock, or friction, making this one of the most dangerous materials encountered in transport emergencies.
Hazard overview: UN 0118 presents a mass explosion hazard with the potential for simultaneous detonation of the entire load, producing severe blast overpressure and high-velocity fragmentation. The composition is sensitive to heat, mechanical shock, and friction, meaning that firefighting efforts or physical contact can trigger catastrophic detonation.
Response guidance: If UN 0118 is involved in a fire or exposed to heat, evacuate all personnel a minimum of 1,600 meters in all directions immediately and do not attempt suppression. Isolation of at least 500 meters in all directions is required at all times, and no personnel should approach the material under any circumstances if detonation is possible.
UN 0118 Quick Details
Common Hazards of UN 0118
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
Chemical Identity & Physical Properties
UN 0118 Hexolite appears as a pale yellow to tan granular or pressed solid explosive composition with no odor or a faint aromatic smell that remains solid at room temperature.
| Also known as | HexoliteHexotolRDX/TNT mixtureComposition B variantHexogen-TNT explosive |
| Appearance | Pale yellow to tan granular or pressed solid explosive composition. Odorless or faint aromatic odor. Remains solid at room temperature. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes violently upon heating) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, but water should not be used for fire suppression |
Fireground Response Guidance — UN 0118
Extinguishing Media
PPE Requirements
Full structural firefighting gear with SCBA is the minimum required if approach is absolutely necessary, though Level A protection with blast-resistant cover is strongly recommended for any personnel near UN 0118.
Isolation & Evacuation
First Actions for a UN 0118 Incident
- 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.
📋 Copy & Share Field Card
UN 0118 — Hexolite; HexotolUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.