☣️ UN 2978 • CLASS 7
Uranium hexafluoride, radioactive material, non fissile or fissile-excepted 2983 131P Ethylene oxide and propylene oxide mixture, with not more than 30% ethylene oxide
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 2978
Class: 7
Placard type: Radioactive
ERG: Guide 166 (check current ERG)
Verify shipping papers and exact product details; use ERG Guide 166 for initial actions and isolation/evacuation guidance.
Common hazards (high level)
- Radiation presents minimal risk to transport workers, emergency response personnel and the public
- Low radiation hazard to people. Chemical hazard greatly exceeds radiation hazard.
- Substance reacts with water and water vapor in air to form toxic and corrosive hydrogen fluoride gas,
- Toxic; may be fatal if inhaled, ingested, or absorbed through skin.
- Direct contact with substance and gas may cause burns to skin, eyes, or respiratory tract.
- Runoff from control of cargo fire may cause low-level pollution.
- Substance does not burn.
- The material may react violently with fuels.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the
- 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
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- See Table 1 - Initial Isolation and Protective Action Distances.
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MAYDAY / HAZMAT QUICK NOTE UN 2978 — Uranium hexafluoride, radioactive material, non fissile or fissile-excepted 2983 131P Ethylene oxide and propylene oxide mixture, with not more than 30% ethylene oxide Class: 7 | Placard: Radioactive ERG: Guide 166 (check current ERG) FIRST ACTIONS: use SOP/SOG + ERG; stage upwind; isolate; deny entry; request Hazmat.
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FAQ
A UN/NA number is a four-digit identifier used in transport markings and placards to help identify hazardous materials for emergency response.
No. This page is a training/quick-reference aid. Always consult the current ERG and follow your SOP/SOG for incident-specific protective actions.
Common locations include placards, orange panels, shipping papers, SDS documents, container markings, rail car/vehicle IDs, and facility signage.
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.