UN 1911 — Diborane mixtures
Placard: Flammable Gas. ERG Guide 119. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1911 is Diborane mixtures, a hazardous material assigned to ERG Guide 119. Responders should verify the exact product with shipping papers, package markings and SDS before close action.
Hazard overview: UN 1911 presents hazards that depend on formulation, packaging and incident conditions. Use ERG, SDS and incident command to set isolation, PPE and control actions.
Response guidance: For a UN 1911 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 119. Establish incident command, isolate the area, stay upwind, prevent incompatible contact, control runoff and choose entry or fire-control actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1911 should emphasize exposure routes, air monitoring, PPE selection, decontamination, runoff containment and ERG/SDS verification. Use ERG 119, SDS and local SOP.
Regulatory context: Diborane mixtures is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, 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: Diborane mixtures should be stored in tightly closed compatible containers in a secure, cool, dry, well-ventilated hazardous-material area according to SDS and local procedures.
UN 1911 Quick Details
Common Hazards of UN 1911
- 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
Colorless gas with a repulsive, sweet odor. Shipped as a liquefied compressed gas or in mixtures with inert gases.
| Also known as | DiboraneBoron hydrideDiborane(6)Boroethane |
| CAS Number | 19287-45-7 |
| Appearance | Colorless gas with a repulsive, sweet odor. Shipped as a liquefied compressed gas or in mixtures with inert gases. |
| Flash Point | Not applicable (pyrophoric gas, ignites spontaneously in air) |
| Boiling Point | -92.5C (-134.5F) |
| Vapor Density | 0.96 (lighter than air) |
| Water Reactivity | Reacts violently with water, releasing hydrogen and boric acid; do not use water directly on leaks |
Fireground Response Guidance — UN 1911
Extinguishing Media
PPE Requirements
Use protective equipment selected from SDS, monitoring results and incident command.
Isolation & Evacuation
First Actions for a UN 1911 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, mist or spray and avoid 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, water reaction or unknown concentration is present.
- Use ERG Guide 119, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1911 — Diborane mixturesUse 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.