UN 0337 — Fireworks
Placard: Explosive 1.4S. ERG Guide 114. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0337 is Fireworks, a Class 1.4 pyrotechnic article assigned to ERG Guide 114. It is a limited-effect fireworks entry, but fire, smoke and projection hazards still matter to responders.
Hazard overview: UN 0337 fireworks are limited-effect pyrotechnic articles. Fire can still cause localized burning, popping, small projectiles, smoke and hot fragments, especially if packages are damaged or multiple devices ignite together.
Response guidance: For a UN 0337 fireworks incident, responders should confirm the shipment and division using markings, shipping papers and ERG Guide 114. Isolate the area, stay upwind, keep people away from smoke and heated packages, and expand the perimeter if fire involves larger quantities.
Firefighter training notes: Training should emphasize the difference between 1.4 limited-effect explosives and higher-hazard Class 1 materials. Common errors include standing too close to heated packages, dismissing smoke hazards, disturbing damaged articles and failing to check for adjacent explosives or ammunition.
Regulatory context: Fireworks is regulated as a Class 1 explosive article for transportation. Storage, quantity limits, fire code controls and reporting requirements may vary by jurisdiction. Responders should verify current requirements through shipping papers, product documents and applicable DOT, ATF, OSHA, NFPA or local authority guidance.
Storage & handling: Fireworks should be stored in compatible packaging away from heat, sparks, open flame, impact and unauthorized access. Keep separated from incompatible explosives, propellants and combustible clutter according to product instructions and local fire code.
UN 0337 Quick Details
Common Hazards of UN 0337
- Minor explosive and fire hazard with effects usually limited to the package or immediate area.
- Fireworks may ignite, burn, pop, launch small projectiles or scatter burning fragments if heated.
- Smoke may irritate the eyes and respiratory tract and reduce visibility.
- Low mass explosion risk under normal transport conditions.
- Damaged packages can increase unpredictable ignition or projection behavior.
- Nearby fireworks, ammunition or pyrotechnics may increase the overall incident hazard.
Chemical Identity & Physical Properties
Solid articles containing pyrotechnic compositions, typically colorful paper or cardboard tubes filled with chemical mixtures. Colors vary widely (red, green, blue, white). May emit characteristic sulfur or gunpowder odor.
| Also known as | PyrotechnicsPyrotechnic devicesFirework articlesConsumer fireworksDisplay fireworksAerial shells |
| Appearance | Solid articles containing pyrotechnic compositions, typically colorful paper or cardboard tubes filled with chemical mixtures. Colors vary widely (red, green, blue, white). May emit characteristic sulfur or gunpowder odor. |
| Flash Point | Not applicable (solid explosive article) |
| Boiling Point | Not applicable (solid explosive article) |
| Vapor Density | Not applicable (solid explosive article) |
| Water Reactivity | No significant reaction with water; water is primary extinguishing agent for fires involving UN 0337 fireworks |
Fireground Response Guidance — UN 0337
Extinguishing Media
PPE Requirements
Structural firefighting protective clothing with SCBA is appropriate for fire or smoke exposure, with distance maintained from heated packages. Approach and handling should follow incident command and local SOP.
Isolation & Evacuation
First Actions for a UN 0337 Incident
- CALL 911. Notify law enforcement if ammunition components, explosive articles or ordnance are involved.
- Keep unauthorized personnel away.
- Stage upwind and avoid smoke from burning articles.
- Move unprotected people out of the smoke path when safe and practical.
- Eliminate ignition sources if it is safe to do so.
- Isolate the area and expand the perimeter if fire grows or additional explosives are present.
- Use ERG Guide 114, shipping papers and incident command for isolation and fire response decisions.
📋 Copy & Share Field Card
UN 0337 — FireworksUse 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.