UN 0237 — Charges, shaped, flexible, linear
Placard: Explosive 1.4D. ERG Guide 114. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0237 covers flexible linear shaped charges (FLSC), which are V-shaped metal-sheathed explosive devices loaded with high explosives such as RDX or PETN, engineered to focus cutting energy along a linear path. These articles are classified as Explosive 1.4D under ERG Guide 114, indicating a minor blast and fire hazard under normal conditions with limited mass explosion risk.
Hazard overview: UN 0237 presents a localized blast, burning, or deflagration hazard, with smoke and heat generated if the material ignites. If packaging is compromised or fire threatens stored quantities, the hazard escalates and the material must be treated as a potential mass explosion risk.
Response guidance: For incidents involving UN 0237, isolate the area a minimum of 500 meters in all directions if fire is involved and evacuate immediately if flames are approaching any explosives. Use dry chemical, sand, or CO2 for small fires, and apply water spray only from a safe distance for larger fires.
UN 0237 Quick Details
Common Hazards of UN 0237
- Minor blast or fire hazard — limited effect.
- Localized burning or deflagration possible.
- Smoke and heat from burning.
- Low mass explosion risk under normal conditions.
Chemical Identity & Physical Properties
UN 0237 flexible linear shaped charges consist of a V-shaped metal sheath filled with high explosive material such as RDX or PETN, designed to concentrate detonation energy in a directional cutting pattern.
| Also known as | Flexible linear shaped chargesFLSCLinear explosive chargesDemolition cord assembliesJet-cutting charges |
| Appearance | Flexible linear explosive devices typically consisting of a V-shaped metal sheath containing high explosive material (often RDX or PETN-based). Designed to cut through metal structures by focusing explosive energy in a linear pattern. |
| Flash Point | Not applicable (explosive article) |
| Boiling Point | Not applicable (explosive article) |
| Vapor Density | Not applicable (solid article) |
| Water Reactivity | No significant reaction with water |
Fireground Response Guidance — UN 0237
Extinguishing Media
PPE Requirements
Responders must wear full blast-resistant protective clothing, helmet, and face shield, and don SCBA whenever fire or smoke is present during a UN 0237 incident.
Isolation & Evacuation
First Actions for a UN 0237 Incident
- CALL 911. Notify law enforcement.
- Isolate area; keep unauthorized personnel away.
- Stage upwind; eliminate ignition sources.
- Request Hazmat + law enforcement.
- Consult current ERG Guide 114 and follow SOP/SOG.
📋 Copy & Share Field Card
UN 0237 — Charges, shaped, flexible, linearUse 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.