☣️ UN 3321 • CLASS 7
Radioactive material, low specific activity (LSA-II), non fissile or fissile-excepted
Placard: Radioactive. 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 3321
Class: 7
Placard type: Radioactive
ERG: Guide 162 (check current ERG)
Isolation: ERG 162: isolate spill/leak area immediate precautions 25m in all directions; for large spills increase isolation 80m; do not touch damaged packages or spilled material
Chemical & Response Details
| Also known as | LSA-II radioactive materialLow specific activity material class IINon-fissile radioactive material LSA-IIRadioactive LSA-2 |
| Appearance | Variable physical form including solids, liquids, or gases with low specific activity radioactivity. Material may be ores, mill tailings, contaminated equipment, or activated materials with activity concentration meeting LSA-II criteria. |
| Flash Point | Not applicable (radioactive material classification based on activity, not flammability) |
| Boiling Point | Not applicable (varies by specific material composition) |
| Vapor Density | Not applicable (varies by specific material form and composition) |
| Water Reactivity | Generally no significant reaction; depends on specific material composition |
| Extinguishing | Water spray, foam acceptable for fire control; focus on radiation containment over fire suppression method |
| PPE | ⚠️ Radiation monitoring equipment required; protective clothing to prevent contamination; respiratory protection if airborne contamination possible; dosimetry badges mandatory |
| Isolation | ERG 162: isolate spill/leak area immediate precautions 25m in all directions; for large spills increase isolation 80m; do not touch damaged packages or spilled material |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Radiation presents minimal risk to transport workers, emergency response personnel and the public
- Undamaged packages are safe. Contents of damaged packages may cause higher external radiation
- Low radiation hazard when material is inside container. If material is released from package or bulk
- Some material may be released from packages during accidents of moderate severity but risks to people
- Released radioactive materials or contaminated objects usually will be visible if packaging fails.
- Some exclusive use shipments of bulk and packaged materials will not have RADIOACTIVE labels.
- Some packages may have a RADIOACTIVE label and a second hazard label. The second hazard is usually
- Some radioactive materials cannot be detected by commonly available instruments.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not
- Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority
- Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Detain or isolate uninjured persons or equipment suspected to be contaminated; delay decontamination and
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 3321 — Radioactive material, low specific activ HAZMAT RADIO NOTE — UN 3321
Product: Radioactive material, low specific activity (LSA-II), non fissile or fissile-excepted
Class 7 / Radioactive / ERG 162
PPE: Radiation monitoring equipment required; protective clothing to prevent contamination; respiratory protection if airborne contamination possible; dosimetry badges mandatory
ISOLATION: ERG 162: isolate spill/leak area immediate precautions 25m in all directions; for large spills increase isolation 80m; do not touch damaged packages or spilled material
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 3321 — Radioactive material, low specific activity (LSA-II), non fissile or fissile-excepted
Class: 7 | Placard: Radioactive | ERG Guide: 162
Appearance: Variable physical form including solids, liquids, or gases with low specific activity radioactivity. Material may be ores, mill tailings, contaminated equipment, or activated materials with activity concentration meeting LSA-II criteria.
Water Reactivity: Generally no significant reaction; depends on specific material composition
Extinguishing: Water spray, foam acceptable for fire control; focus on radiation containment over fire suppression method
PPE: Radiation monitoring equipment required; protective clothing to prevent contamination; respiratory protection if airborne contamination possible; dosimetry badges mandatory
Isolation: ERG 162: isolate spill/leak area immediate precautions 25m in all directions; for large spills increase isolation 80m; do not touch damaged packages or spilled material
— Key Hazards —
• Radiation presents minimal risk to transport workers, emergency response personnel and the public
• Undamaged packages are safe. Contents of damaged packages may cause higher external radiation
• Low radiation hazard when material is inside container. If material is released from package or bulk
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not
• Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority
• Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
• Stay upwind, uphill and/or upstream.
SOURCE: allfirefighter.com/hazmat/un/3321 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3321 Radioactive material, low specific activity (LSA-II), non fissile or fissile-excepted Cls7 ERG162 | allfirefighter.com/hazmat/un/3321SMS / 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/3321
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FAQ
Radiation presents minimal risk to transport workers, emergency response personnel and the public Undamaged packages are safe. Contents of damaged packages may cause higher external radiation Low radiation hazard when material is inside container. If material is released from package or bulk Some material may be released from packages during accidents of moderate severity but risks to people Released radioactive materials or contaminated objects usually will be visible if packaging fails. Some exclusive use shipments of bulk and packaged materials will not have RADIOACTIVE labels. Some packages may have a RADIOACTIVE label and a second hazard label. The second hazard is usually Some radioactive materials cannot be detected by commonly available instruments.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
Radiation monitoring equipment required; protective clothing to prevent contamination; respiratory protection if airborne contamination possible; dosimetry badges mandatory
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 162 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.