☣️ DOT Hazmat Classification

DOT Hazmat Class 7: Radioactive Materials

Control time, distance, and shielding—limit exposure and follow specialized procedures.

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DOT CLASS 7
⚠️ Training/quick-reference only. For real incidents, follow your agency's SOP/SOG and consult the current ERG.

DOT Hazard Class 7 At a Glance

DOT Hazard Class 7 covers Radioactive Materials. Control time, distance, and shielding—limit exposure and follow specialized procedures. Common examples include Medical isotopes (transport), Industrial sources, Radiography equipment. Use this guide for placard recognition, hazards, first actions, ERG context, and related UN numbers.

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Common Hazards of Class 7 Radioactive Materials

  • Radiation exposure risk
  • Contamination potential (if breached)
  • Public concern and complex coordination
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How to Recognize Class 7 Radioactive Materials

  • Radiation trefoil labels/placards
  • Transport containers with specialized markings
  • Radiation monitoring alarms (if present)
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First Actions for Class 7 Radioactive Materials Incidents

Initial priorities for DOT Hazmat Class 7 (Radioactive Materials) incidents. These are general guidelines — always verify with shipping papers, consult the current ERG, and follow your SOP/SOG.

  1. Increase distance and limit time near source
  2. Isolate area and control access
  3. Request Hazmat + specialized agencies per SOP
  4. Do not handle packages unless directed
  5. Use monitoring and shielding principles
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Critical Don'ts for Class 7 Radioactive Materials

  • Do not open containers or disturb shielding
  • Do not transport suspected sources casually
  • Do not allow unnecessary convergence
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Common Products & Examples — Class 7 Radioactive Materials

Medical isotopes (transport)Industrial sourcesRadiography equipment

These are representative examples only. Product-specific hazards vary — always confirm via shipping papers and current ERG.

🔎 UN Number LookupQuick search

Enter a UN number (e.g., UN 1203 — Gasoline) for product-specific guidance. Always verify with current ERG + shipping papers.

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Common UN Numbers in Class 7 (Radioactive Materials)

UN 2908Radioactive material, excepted package, empty packagingUN 2909Radioactive material, excepted package, articles manufactured from depleted uraniumUN 2910Radioactive material, excepted package, limited quantity of materialUN 2911Radioactive material, excepted package, instrumentsUN 2912Radioactive material, low specific activity (LSA-I), non fissile or fissile-exceptedUN 2913Radioactive material, surface contaminated objects (SCO-I, SCO-II or SCO-III), non fissile or fissile-exceptedUN 2915Radioactive material, Type A package, non-special form, non fissile or fissile-exceptedUN 2916Radioactive material, Type B(U) package, non fissile or fissile-exceptedUN 2917Radioactive material, Type B(M) package, non fissile or fissile-exceptedUN 2919Radioactive material, transported under special arrangement, non fissile or fissile-exceptedUN 2977Radioactive material, uranium hexafluoride, fissileUN 2978Uranium hexafluoride, radioactive material, non fissile or fissile-exceptedUN 2982Radioactive material, n.o.s.UN 3321Radioactive material, low specific activity (LSA-II), non fissile or fissile-exceptedUN 3322Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted

More UN numbers discoverable via the Hazmat Hub. Always consult current ERG + SOP/SOG for operations.

See all 26 UN numbers in Class 7 →

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FAQ — DOT Hazmat Class 7 (Radioactive Materials)

Time, distance, and shielding—minimize time, maximize distance, and use shielding when directed.

Not always—sealed sources may not contaminate unless damaged; treat as unknown until confirmed.

Isolate, control access, and request appropriate resources; then follow SOP/SOG.
Sources: DOT/PHMSA hazard class concepts, NFPA 704 overview, and ERG usage principles. This guide does not reproduce ERG guide text — always consult the current ERG for incident-specific protective actions.

Explore Other DOT Hazmat Classes

← Class 6 — Toxic & Infectious Substances Class 8 — Corrosives →

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Hazmat HubUN Number LookupUN 1203 (Gasoline)MAYDAY LUNAR Tool
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