☣️ UN 1854 • CLASS 4
UN 1854 — Barium alloys, pyrophoric
Placard: Spontaneously Combustible. ERG Guide 135. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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.
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UN 1854 Quick Details
UN 1854
Product name: Barium alloys, pyrophoric
DOT Class: 4
Placard type: Spontaneously Combustible
ERG Guide: 135 (check current ERG)
Initial isolation: ERG 135: isolate 25m in all directions initially. If tank/rail car involved in fire, isolate 800m in all directions.
Common Hazards of UN 1854
- Flammable/combustible material.
- May ignite on contact with moist air or moisture.
- May burn rapidly with flare-burning effect.
- Some react vigorously or explosively on contact with water.
- Some may decompose explosively when heated or involved in a fire.
- May re-ignite after fire is extinguished.
- Runoff may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Pyrophoric barium alloysBarium metal alloysBarium amalgams |
| Appearance | Silvery-gray metallic solid or powder that ignites spontaneously in air. No distinct odor. Pyrophoric nature causes immediate ignition upon exposure to moisture or humid air. |
| Flash Point | Not applicable (pyrophoric solid - ignites spontaneously) |
| Boiling Point | Not applicable (metal alloy) |
| Vapor Density | Not applicable (solid metal) |
| Water Reactivity | Reacts violently with water producing flammable hydrogen gas and heat. May ignite spontaneously. Do not use water. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1854
Extinguishing Media
Dry sand, dry salt (NaCl), dry graphite powder. No water, no foam, no CO2.
PPE Requirements
⚠️ Level A recommended for spill response. SCBA required. Full chemical-resistant suit. Avoid any moisture contact.
Isolation & Evacuation
ERG 135: isolate 25m in all directions initially. If tank/rail car involved in fire, isolate 800m in all directions.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 135).
First Actions for a UN 1854 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- 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
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📋 Copy & Share Field Card
UN 1854 — Barium alloys, pyrophoricHAZMAT RADIO NOTE — UN 1854
Product: Barium alloys, pyrophoric
Class 4 / Spontaneously Combustible / ERG 135
PPE: Level A recommended for spill response. SCBA required. Full chemical-resistant suit. Avoid any moisture contact.
ISOLATION: ERG 135: isolate 25m in all directions initially. If tank/rail car involved in fire, isolate 800m in all directions.
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 1854 — Barium alloys, pyrophoric
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 135
Appearance: Silvery-gray metallic solid or powder that ignites spontaneously in air. No distinct odor. Pyrophoric nature causes immediate ignition upon exposure to moisture or humid air.
Water Reactivity: Reacts violently with water producing flammable hydrogen gas and heat. May ignite spontaneously. Do not use water.
Extinguishing: Dry sand, dry salt (NaCl), dry graphite powder. No water, no foam, no CO2.
PPE: Level A recommended for spill response. SCBA required. Full chemical-resistant suit. Avoid any moisture contact.
Isolation: ERG 135: isolate 25m in all directions initially. If tank/rail car involved in fire, isolate 800m in all directions.
— Key Hazards —
• Flammable/combustible material.
• May ignite on contact with moist air or moisture.
• May burn rapidly with flare-burning effect.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/1854 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1854 Barium alloys, pyrophoric Cls4 ERG135 | allfirefighter.com/hazmat/un/1854SMS / 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/1854
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Frequently Asked Questions about UN 1854
Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level A recommended for spill response. SCBA required. Full chemical-resistant suit. Avoid any moisture contact.
Water reactivity: Reacts violently with water producing flammable hydrogen gas and heat. May ignite spontaneously. Do not use water.. Recommended extinguishing: Dry sand, dry salt (NaCl), dry graphite powder. No water, no foam, no CO2..
ERG Guide 135 recommendation: ERG 135: isolate 25m in all directions initially. If tank/rail car involved in fire, isolate 800m in all directions.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 135 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.