☣️ UN 3554 • CLASS 9
UN 3554 — Gallium contained in manufactured articles
Placard: Miscellaneous. ERG Guide 172. 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 3554 Quick Details
UN 3554
Product name: Gallium contained in manufactured articles
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 172 (check current ERG)
Initial isolation: ERG 172: No specific isolation distance for manufactured articles. If damaged/leaking, treat as small spill with minimal isolation.
Common Hazards of UN 3554
- Inhalation of vapors or contact with substance will result in contamination and potential harmful effects.
- Fire will produce irritating, corrosive and/or toxic gases.
- Non-combustible, substance itself does not burn but may react upon heating to produce corrosive
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
| Also known as | Elemental galliumMetallic galliumGa metal |
| CAS Number | 7440-55-3 |
| Appearance | Silvery-white metal, solid at room temperature but melts at approximately 30°C (86°F). Soft enough to cut with a knife. No significant odor. |
| Flash Point | Not applicable (non-combustible metal) |
| Boiling Point | 2204°C (3999°F) |
| Vapor Density | Not applicable (metal with very low vapor pressure at normal temperatures) |
| Water Reactivity | No significant reaction with water under normal conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3554
Extinguishing Media
Use dry chemical, sand, or carbon dioxide. Water may be used to cool containers.
PPE Requirements
⚠️ Level C minimum for handling manufactured articles. Avoid skin contact with molten gallium; use chemical-resistant gloves and eye protection.
Isolation & Evacuation
ERG 172: No specific isolation distance for manufactured articles. If damaged/leaking, treat as small spill with minimal isolation.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 172).
First Actions for a UN 3554 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 for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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📋 Copy & Share Field Card
UN 3554 — Gallium contained in manufactured articlHAZMAT RADIO NOTE — UN 3554
Product: Gallium contained in manufactured articles
Class 9 / Miscellaneous / ERG 172
PPE: Level C minimum for handling manufactured articles. Avoid skin contact with molten gallium; use chemical-resistant gloves and eye protection.
ISOLATION: ERG 172: No specific isolation distance for manufactured articles. If damaged/leaking, treat as small spill with minimal isolation.
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 3554 — Gallium contained in manufactured articles
Class: 9 | Placard: Miscellaneous | ERG Guide: 172
Appearance: Silvery-white metal, solid at room temperature but melts at approximately 30°C (86°F). Soft enough to cut with a knife. No significant odor.
Water Reactivity: No significant reaction with water under normal conditions
Extinguishing: Use dry chemical, sand, or carbon dioxide. Water may be used to cool containers.
PPE: Level C minimum for handling manufactured articles. Avoid skin contact with molten gallium; use chemical-resistant gloves and eye protection.
Isolation: ERG 172: No specific isolation distance for manufactured articles. If damaged/leaking, treat as small spill with minimal isolation.
— Key Hazards —
• Inhalation of vapors or contact with substance will result in contamination and potential harmful effects.
• Fire will produce irritating, corrosive and/or toxic gases.
• Non-combustible, substance itself does not burn but may react upon heating to produce corrosive
— 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 for at least 50 meters (150 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/3554 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3554 Gallium contained in manufactured articles Cls9 ERG172 | allfirefighter.com/hazmat/un/3554SMS / 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/3554
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Frequently Asked Questions about UN 3554
Inhalation of vapors or contact with substance will result in contamination and potential harmful effects. Fire will produce irritating, corrosive and/or toxic gases. Non-combustible, substance itself does not burn but may react upon heating to produce corrosive Runoff may pollute waterways.
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 C minimum for handling manufactured articles. Avoid skin contact with molten gallium; use chemical-resistant gloves and eye protection.
Water reactivity: No significant reaction with water under normal conditions. Recommended extinguishing: Use dry chemical, sand, or carbon dioxide. Water may be used to cool containers..
ERG Guide 172 recommendation: ERG 172: No specific isolation distance for manufactured articles. If damaged/leaking, treat as small spill with minimal isolation.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 172 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.