☣️ UN 2455 • CLASS 2.1
Methyl nitrite
Placard: Flammable Gas. 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 2455
Class: 2.1
Placard type: Flammable Gas
ERG: Guide 116 (check current ERG)
Extremely flammable compressed gas. Handle under inert atmosphere. Use ERG Guide 116 for isolation and firefighting guidance.
Common hazards (high level)
- EXTREMELY FLAMMABLE gas.
- Forms explosive mixtures with air and may ignite spontaneously.
- Vapors may travel considerable distance to an ignition source and flash back.
- Containers may explode when heated.
- May polymerize violently under heat or contamination.
First actions (field-minded)
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- Keep unauthorized personnel away.
- Eliminate all ignition sources; no smoking, flares, sparks, or flames.
- Stop leak if safe to do so.
- Stay upwind, uphill, and/or upstream; ventilate area.
- Consider initial evacuation for at least 800 meters (1/2 mile) downwind.
Related UN numbers (same class)
This is a discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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MAYDAY / HAZMAT QUICK NOTE UN 2455 — Methyl nitrite Class: 2.1 | Placard: Flammable Gas ERG: Guide 116 (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.