UN 0121 — Igniters
Placard: Explosive 1.1G. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0121, also known as igniters, are small metallic or composite devices containing explosive or pyrotechnic material. They are designed to produce flame, heat, or shock to initiate other explosive charges.
Hazard overview: The igniters pose an initiation hazard and can trigger other explosives, as well as cause fire and fragmentation on activation. They can also explode and cause significant damage.
Response guidance: In case of a fire, evacuate the area and let it burn, as fighting the fire can cause the explosives to detonate. Approach the area with extreme caution and avoid static discharge.
UN 0121 Quick Details
Common Hazards of UN 0121
- Initiation hazard — can trigger other explosives
- Fire and fragmentation on activation
- Sensitive to electrical charge and heat
Chemical Identity & Physical Properties
The igniters are small metallic or composite devices, typically enclosed in metal or plastic housings, and are designed to produce flame, heat, or shock.
| Also known as | Electric ignitersIgniter assembliesPyrotechnic ignitersSquibsIgnition devices |
| Appearance | Small metallic or composite devices containing explosive or pyrotechnic material, typically enclosed in metal or plastic housings. Designed to produce flame, heat, or shock to initiate other explosive charges. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | No significant reaction with water, but water may not extinguish burning igniters |
Fireground Response Guidance — UN 0121
Extinguishing Media
PPE Requirements
Level B minimum personal protective equipment with SCBA is required, along with full protective clothing and approach with extreme caution.
Isolation & Evacuation
First Actions for a UN 0121 Incident
- CALL 911. Then call emergency response number on shipping paper.
- Isolate minimum 500 meters
- Stage upwind; deny entry
- Request Hazmat + law enforcement
- Consult current ERG Guide 112 and SOP/SOG
📋 Copy & Share Field Card
UN 0121 — IgnitersUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.