☣️ UN 3089 • CLASS 4
Metal powder, flammable, n.o.s.
Placard: Flammable Solid. 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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Quick details
UN 3089
Class: 4
Placard type: Flammable Solid
ERG: Guide 170 (check current ERG)
Isolation: ERG 170: isolate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind
Chemical & Response Details
| Also known as | Metal powder n.o.s.Flammable metal powderPyrophoric metal powderPowdered metal |
| Appearance | Fine metallic powder, color varies by metal type (gray, silver, black). Odorless. Solid particulate at room temperature that may be transported in flammable liquid carrier. |
| Flash Point | Not applicable (solid powder, may ignite from friction/sparks) |
| Boiling Point | Not applicable (metal solid, decomposes or sublimes at extreme temperatures) |
| Vapor Density | Not applicable (solid particulate) |
| Water Reactivity | May react violently or explosively on contact with water, producing flammable hydrogen gas and heat |
| Extinguishing | Dry sand, dry chemical powder, soda ash; DO NOT use water, foam, or CO2 |
| PPE | ⚠️ Level B minimum; SCBA required; fire-resistant clothing; avoid friction and static discharge |
| Isolation | ERG 170: isolate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May react violently or explosively on contact with water.
- Some are transported in flammable liquids.
- May be ignited by friction, heat, sparks or flames.
- Some of these materials will burn with intense heat.
- Dusts or fumes may form explosive mixtures in air.
- Containers may explode when heated.
- May re-ignite after fire is extinguished.
- Oxides from metallic fires are a severe health hazard.
First actions (field-minded)
- 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
- Consider initial downwind evacuation for at least 50 meters (160 feet).
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UN 3089 — Metal powder, flammable, n.o.s. HAZMAT RADIO NOTE — UN 3089
Product: Metal powder, flammable, n.o.s.
Class 4 / Flammable Solid / ERG 170
PPE: Level B minimum; SCBA required; fire-resistant clothing; avoid friction and static discharge
ISOLATION: ERG 170: isolate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind
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 3089 — Metal powder, flammable, n.o.s.
Class: 4 | Placard: Flammable Solid | ERG Guide: 170
Appearance: Fine metallic powder, color varies by metal type (gray, silver, black). Odorless. Solid particulate at room temperature that may be transported in flammable liquid carrier.
Water Reactivity: May react violently or explosively on contact with water, producing flammable hydrogen gas and heat
Extinguishing: Dry sand, dry chemical powder, soda ash; DO NOT use water, foam, or CO2
PPE: Level B minimum; SCBA required; fire-resistant clothing; avoid friction and static discharge
Isolation: ERG 170: isolate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind
— Key Hazards —
• May react violently or explosively on contact with water.
• Some are transported in flammable liquids.
• May be ignited by friction, heat, sparks or flames.
— 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/3089 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3089 Metal powder, flammable, n.o.s. Cls4 ERG170 | allfirefighter.com/hazmat/un/3089SMS / 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/3089
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FAQ
May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. Oxides from metallic fires are a severe health hazard.
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 B minimum; SCBA required; fire-resistant clothing; avoid friction and static discharge
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 170 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.