☣️ UN 1309 • CLASS 4
Aluminum powder, coated
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 1309
Class: 4
Placard type: Flammable Solid
ERG: Guide 170 (check current ERG)
Isolation: ERG 170: isolate spill area at least 25m in all directions; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m
Chemical & Response Details
| Also known as | Coated aluminum powderAluminum metal powderStabilized aluminum powderAluminum dust coated |
| CAS Number | 7429-90-5 |
| Appearance | Gray to silver metallic powder with a protective coating (typically stearic acid or other organic material). Odorless or slight fatty odor depending on coating material. |
| Flash Point | Not applicable (combustible metal powder) |
| Boiling Point | 2519C (4566F) |
| Vapor Density | Not applicable (solid powder) |
| Water Reactivity | Coating minimizes reactivity but may still react with water producing flammable hydrogen gas and heat, especially if coating is compromised |
| Extinguishing | Dry sand, dry chemical, soda ash, or dry dolomite; DO NOT use water, foam, CO2, or halogenated agents |
| PPE | ⚠️ Level B minimum; SCBA required in fire or confined spaces; avoid creating dust clouds; prevent ignition sources |
| Isolation | ERG 170: isolate spill area at least 25m in all directions; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m |
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 1309 — Aluminum powder, coated HAZMAT RADIO NOTE — UN 1309
Product: Aluminum powder, coated
Class 4 / Flammable Solid / ERG 170
PPE: Level B minimum; SCBA required in fire or confined spaces; avoid creating dust clouds; prevent ignition sources
ISOLATION: ERG 170: isolate spill area at least 25m in all directions; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m
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 1309 — Aluminum powder, coated
Class: 4 | Placard: Flammable Solid | ERG Guide: 170
Appearance: Gray to silver metallic powder with a protective coating (typically stearic acid or other organic material). Odorless or slight fatty odor depending on coating material.
Water Reactivity: Coating minimizes reactivity but may still react with water producing flammable hydrogen gas and heat, especially if coating is compromised
Extinguishing: Dry sand, dry chemical, soda ash, or dry dolomite; DO NOT use water, foam, CO2, or halogenated agents
PPE: Level B minimum; SCBA required in fire or confined spaces; avoid creating dust clouds; prevent ignition sources
Isolation: ERG 170: isolate spill area at least 25m in all directions; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m
— 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/1309 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1309 Aluminum powder, coated Cls4 ERG170 | allfirefighter.com/hazmat/un/1309SMS / 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/1309
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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 in fire or confined spaces; avoid creating dust clouds; prevent ignition sources
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.