UN 1571 — Barium azide, wetted with not less than 50% water
Placard: Flammable Solid. ERG Guide 113. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1571 is Barium azide, wetted with not less than 50% water, a toxic hazardous material assigned to ERG Guide 113. Responders should verify the exact product with shipping papers, package markings and SDS before close action.
Hazard overview: UN 1571 presents toxic exposure hazards by inhalation, ingestion or skin contact. Fire, decomposition or runoff may produce toxic contamination and require air monitoring, isolation and decontamination.
Response guidance: For a UN 1571 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 113. Establish incident command, isolate the area, stay upwind, prevent dust or vapor exposure, control runoff and choose entry or cleanup actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1571 should emphasize toxic exposure routes, air monitoring, PPE selection, decontamination and preventing contaminated runoff. Use ERG 113, SDS and local SOP.
Regulatory context: Barium azide, wetted with not less than 50% water is regulated as a toxic hazardous material. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by compound, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Barium azide, wetted with not less than 50% water should be stored in tightly closed compatible containers in a secure toxic-material area according to SDS and local hazardous materials procedures.
UN 1571 Quick Details
Common Hazards of UN 1571
- Hazards depend on the exact product, packaging and incident conditions.
- Verify the material using shipping papers, labels and SDS before close action.
- Fire may produce irritating or toxic smoke.
- Containers may fail or rupture when heated.
Chemical Identity & Physical Properties
White to grayish crystalline solid when dry, appears as wetted paste or slurry with water. Odorless. Highly sensitive to shock, friction, and heat when dry.
| Also known as | Barium diazideBarium azide hydrateAzide of bariumBarium azoimide |
| CAS Number | 18810-58-7 |
| Appearance | White to grayish crystalline solid when dry, appears as wetted paste or slurry with water. Odorless. Highly sensitive to shock, friction, and heat when dry. |
| Flash Point | Not applicable (wetted explosive solid) |
| Boiling Point | Not applicable (decomposes explosively when heated) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Stable when wet; water is used as desensitizing agent. Do not allow to dry out. |
Fireground Response Guidance — UN 1571
Extinguishing Media
PPE Requirements
Use protective equipment selected from SDS, monitoring results and incident command.
Isolation & Evacuation
First Actions for a UN 1571 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.
- Avoid breathing vapors, fumes, dust or mist and avoid all skin or eye contact.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or leak area and expand the perimeter if vapor, dust, fire involvement or unknown concentration is present.
- Use ERG Guide 113, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1571 — Barium azide, wetted with not less thanUse 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.