☣️ UN 3559 • CLASS 9
UN 3559 — Fire suppressant dispersing devices
Placard: Miscellaneous. ERG Guide 171. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
UN 3559 is Fire suppressant dispersing devices, assigned to ERG Guide 171. This entry should be verified with shipping papers, labels and the SDS before responders commit to close-range action.
Hazard overview: Fire suppressant dispersing devices has article-specific hazards that depend on the contained material. Damaged articles, heat, pressure, smoke or exposed contents may increase risk.
Response guidance: Use ERG Guide 171, confirm the exact contents, isolate the area, keep unauthorized personnel away, control ignition sources and choose extinguishing agents based on the article or material involved.
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UN 3559 Quick Details
UN 3559
Product name: Fire suppressant dispersing devices
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 171 (check current ERG)
Initial isolation: ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, isolate 800m in all directions
Common Hazards of UN 3559
- Some may burn but none ignite readily.
- Containers may explode when heated.
- Some may be transported hot.
- For UN3508, Capacitor, asymmetric, be aware of possible short circuiting as this product is transported
- Polymeric beads, expandable (UN2211) may evolve flammable vapours.
- Inhalation of material may be harmful.
- Contact may cause burns to skin and eyes.
- Inhalation of Asbestos dust may have a damaging effect on the lungs.
Chemical Identity & Physical Properties
Pressurized metal cylinders or cartridges containing fire suppressant agents (halon replacements, CO2, dry chemical, or foam formulations). Typically silvery-gray metal containers, odorless when sealed.
| Also known as | Fire extinguisher dispersing devicesFire suppression system cartridgesFire extinguisher cartridgesAerosol fire suppressant devices |
| Appearance | Pressurized metal cylinders or cartridges containing fire suppressant agents (halon replacements, CO2, dry chemical, or foam formulations). Typically silvery-gray metal containers, odorless when sealed. |
| Flash Point | Not applicable (pressurized devices) |
| Boiling Point | Not applicable (pressurized devices containing mixed agents) |
| Vapor Density | Not applicable (pressurized sealed devices) |
| Water Reactivity | No significant reaction with water; devices may rupture from heat exposure |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3559
Extinguishing Media
Water spray to cool containers, CO2, dry chemical for any small leaks
PPE Requirements
⚠️ Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces
Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces. Select final PPE using ERG guidance, SDS, monitoring and incident command.
Isolation & Evacuation
ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, isolate 800m in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 171).
First Actions for a UN 3559 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- 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 3559 — Fire suppressant dispersing devicesHAZMAT RADIO NOTE — UN 3559
Product: Fire suppressant dispersing devices
Class 9 / Miscellaneous / ERG 171
PPE: Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces
ISOLATION: ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, 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 3559 — Fire suppressant dispersing devices
Class: 9 | Placard: Miscellaneous | ERG Guide: 171
Appearance: Pressurized metal cylinders or cartridges containing fire suppressant agents (halon replacements, CO2, dry chemical, or foam formulations). Typically silvery-gray metal containers, odorless when sealed.
Water Reactivity: No significant reaction with water; devices may rupture from heat exposure
Extinguishing: Water spray to cool containers, CO2, dry chemical for any small leaks
PPE: Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces
Isolation: ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, isolate 800m in all directions
— Key Hazards —
• Some may burn but none ignite readily.
• Containers may explode when heated.
• Some may be transported hot.
— First Actions —
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• 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.
SOURCE: allfirefighter.com/hazmat/un/fire-suppressant-dispersing-devices-un-3559 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3559 Fire suppressant dispersing devices Cls9 ERG171 | allfirefighter.com/hazmat/un/fire-suppressant-dispersing-devices-un-3559SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/fire-suppressant-dispersing-devices-un-3559
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Frequently Asked Questions about UN 3559
UN 3559 is Fire suppressant dispersing devices, assigned to ERG Guide 171.
ERG Guide 171 applies for initial isolation, protective actions and first response guidance.
Fire suppressant dispersing devices has article-specific hazards that depend on the contained material.
Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces.
ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, isolate 800m in all directions.
Water compatibility depends on the specific contents and incident conditions. Check ERG 171, SDS and incident command before applying water.
Verify shipping papers, container markings, SDS, package condition and whether contents are leaking, burning or exposed.
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.