☣️ UN 2900 • CLASS 6
Infectious substance, affecting animals only
Placard: Infectious Substance. 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 2900
Class: 6
Placard type: Infectious Substance
ERG: Guide 158 (check current ERG)
Verify shipping papers and exact product details; use ERG Guide 158 for initial actions and isolation/evacuation guidance.
Common hazards (high level)
- Inhalation or contact with substance may cause infection, disease or death.
- Category A Infectious Substances (UN2814, UN2900 or UN3549) are more hazardous, or are in a more
- Runoff from fire control or dilution water may cause environmental contamination.
- Damaged packages containing solid CO2 as a refrigerant may produce water or frost from condensation
- Contact with solid CO2 may cause burns, severe injury and/or frostbite.
- Some of these materials may burn, but none ignite readily.
- Some may be transported in flammable liquids.
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.
- Consult the shipping paper to identify the substance involved.
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
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MAYDAY / HAZMAT QUICK NOTE UN 2900 — Infectious substance, affecting animals only Class: 6 | Placard: Infectious Substance ERG: Guide 158 (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.