☣️ UN 2806 • CLASS 4
Lithium nitride
Placard: Dangerous When Wet. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
Advertisement
Quick details
UN 2806
Class: 4
Placard type: Dangerous When Wet
ERG: Guide 139 (check current ERG)
Isolation: ERG 139: isolate spill 25m all directions; for large spills isolate 50m and evacuate downwind areas
Chemical & Response Details
| Also known as | Trilithium nitrideLithium nitrogenLi3N |
| CAS Number | 26134-62-3 |
| Appearance | Dark red to purple crystalline solid with no distinct odor. Hygroscopic powder that reacts readily with moisture. |
| Flash Point | Not applicable (water-reactive solid) |
| Boiling Point | Not applicable (decomposes upon heating) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts vigorously with water producing flammable ammonia gas and lithium hydroxide; may ignite spontaneously in moist air |
| Extinguishing | Dry sand, dry chemical, soda ash; NO water or foam |
| PPE | ⚠️ Level B minimum with SCBA; full face protection and chemical-resistant suit required; avoid any moisture contact |
| Isolation | ERG 139: isolate spill 25m all directions; for large spills isolate 50m and evacuate downwind areas |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Produce flammable and toxic gases on contact with water.
- May ignite on contact with water or moist air.
- Some react vigorously or explosively on contact with water.
- May be ignited by heat, sparks or flames.
- May re-ignite after fire is extinguished.
- Some are transported in highly flammable liquids.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
Advertisement
📋 Copy & Share
UN 2806 — Lithium nitride HAZMAT RADIO NOTE — UN 2806
Product: Lithium nitride
Class 4 / Dangerous When Wet / ERG 139
PPE: Level B minimum with SCBA; full face protection and chemical-resistant suit required; avoid any moisture contact
ISOLATION: ERG 139: isolate spill 25m all directions; for large spills isolate 50m and evacuate downwind areas
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 2806 — Lithium nitride
Class: 4 | Placard: Dangerous When Wet | ERG Guide: 139
Appearance: Dark red to purple crystalline solid with no distinct odor. Hygroscopic powder that reacts readily with moisture.
Water Reactivity: Reacts vigorously with water producing flammable ammonia gas and lithium hydroxide; may ignite spontaneously in moist air
Extinguishing: Dry sand, dry chemical, soda ash; NO water or foam
PPE: Level B minimum with SCBA; full face protection and chemical-resistant suit required; avoid any moisture contact
Isolation: ERG 139: isolate spill 25m all directions; for large spills isolate 50m and evacuate downwind areas
— Key Hazards —
• Produce flammable and toxic gases on contact with water.
• May ignite on contact with water or moist air.
• Some react vigorously or explosively on contact with water.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/2806 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2806 Lithium nitride Cls4 ERG139 | ERG 139: isolate spill 25m all directions; for large spills isolate 50m and evac | allfirefighter.com/hazmat/un/2806SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/2806
Advertisement
FAQ
Produce flammable and toxic gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Containers may explode when heated. Runoff may create fire or explosion hazard.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum with SCBA; full face protection and chemical-resistant suit required; avoid any moisture contact
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 139 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.