☣️ UN 3559 • CLASS 9
Fire suppressant dispersing devices
Placard: Miscellaneous. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
Advertisement
Quick details
UN 3559
Class: 9
Placard type: Miscellaneous
ERG: Guide 171 (check current ERG)
Isolation: ERG 171: No evacuation distances specified; isolate spill/leak area and deny entry; if fire or container heated, isolate 800m in all directions
Chemical & Response Details
| 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 |
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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
Advertisement
📋 Copy & Share
UN 3559 — Fire suppressant dispersing devices HAZMAT 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 —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• 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
SOURCE: allfirefighter.com/hazmat/un/3559 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3559 Fire suppressant dispersing devices Cls9 ERG171 | allfirefighter.com/hazmat/un/3559SMS / 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/3559
Advertisement
FAQ
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.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level D adequate for intact devices; Level C with SCBA if containers rupture or leak suppressant agents in confined spaces
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 171 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.