☣️ UN 3548 • CLASS 9
UN 3548 — Articles containing miscellaneous dangerous goods, n.o.s.
Placard: Miscellaneous. ERG Guide 171. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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 3548 is Articles containing miscellaneous dangerous goods, n.o.s., 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: Articles containing miscellaneous dangerous goods, n.o.s. 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 3548 Quick Details
UN 3548
Product name: Articles containing miscellaneous dangerous goods, n.o.s.
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 171 (check current ERG)
Initial isolation: ERG 171: No evacuation distances specified for small spills; if large spill or fire, isolate 25-50m in all directions as precaution
Common Hazards of UN 3548
- 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
Variable physical form - manufactured articles or devices containing small quantities of various hazardous materials. Appearance depends entirely on the specific article being transported.
| Also known as | Dangerous goods in articles NOSMiscellaneous dangerous goods in manufactured articlesArticles containing hazardous materials NOSUN3548 |
| Appearance | Variable physical form - manufactured articles or devices containing small quantities of various hazardous materials. Appearance depends entirely on the specific article being transported. |
| Flash Point | Variable - depends on specific dangerous goods contained within the article |
| Boiling Point | Not applicable - miscellaneous articles |
| Vapor Density | Not applicable - miscellaneous articles |
| Water Reactivity | Variable - depends on specific dangerous goods contained within the article; generally no significant reaction |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3548
Extinguishing Media
Dry chemical, CO2, water spray appropriate for most; consult article specifications
PPE Requirements
⚠️ Level D minimum for intact articles; Level C or B if articles are damaged and contents exposed; SCBA if fire involved
Level D minimum for intact articles; Level C or B if articles are damaged and contents exposed; SCBA if fire involved. Select final PPE using ERG guidance, SDS, monitoring and incident command.
Isolation & Evacuation
ERG 171: No evacuation distances specified for small spills; if large spill or fire, isolate 25-50m in all directions as precaution
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 171).
First Actions for a UN 3548 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 3548 — Articles containing miscellaneous dangerHAZMAT RADIO NOTE — UN 3548
Product: Articles containing miscellaneous dangerous goods, n.o.s.
Class 9 / Miscellaneous / ERG 171
PPE: Level D minimum for intact articles; Level C or B if articles are damaged and contents exposed; SCBA if fire involved
ISOLATION: ERG 171: No evacuation distances specified for small spills; if large spill or fire, isolate 25-50m in all directions as precaution
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 3548 — Articles containing miscellaneous dangerous goods, n.o.s.
Class: 9 | Placard: Miscellaneous | ERG Guide: 171
Appearance: Variable physical form - manufactured articles or devices containing small quantities of various hazardous materials. Appearance depends entirely on the specific article being transported.
Water Reactivity: Variable - depends on specific dangerous goods contained within the article; generally no significant reaction
Extinguishing: Dry chemical, CO2, water spray appropriate for most; consult article specifications
PPE: Level D minimum for intact articles; Level C or B if articles are damaged and contents exposed; SCBA if fire involved
Isolation: ERG 171: No evacuation distances specified for small spills; if large spill or fire, isolate 25-50m in all directions as precaution
— 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/articles-containing-miscellaneous-dangerous-un-3548 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3548 Articles containing miscellaneous dangerous goods, n.o.s. Cls9 ERG171 | allfirefighter.com/hazmat/un/articles-containing-miscellaneous-dangerous-un-3548SMS / 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/articles-containing-miscellaneous-dangerous-un-3548
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Frequently Asked Questions about UN 3548
UN 3548 is Articles containing miscellaneous dangerous goods, n.o.s., assigned to ERG Guide 171.
ERG Guide 171 applies for initial isolation, protective actions and first response guidance.
Articles containing miscellaneous dangerous goods, n.
Level D minimum for intact articles; Level C or B if articles are damaged and contents exposed; SCBA if fire involved.
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.