☣️ UN 0431 • CLASS 1
Articles, pyrotechnic for technical purposes
Placard: Explosive 1.4G. 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 0431
Class: 1
Placard type: Explosive 1.4G
ERG: Guide 114 (check current ERG)
Isolation: ERG 114: isolate spill or leak area immediately for at least 50 meters in all directions; if fire or explosion occurs, evacuate 800 meters in all directions
Chemical & Response Details
| Also known as | Pyrotechnic articlesTechnical pyrotechnic devicesPyrotechnic assemblies for technical useNon-entertainment pyrotechnic articles |
| Appearance | Manufactured articles containing pyrotechnic substances designed for technical applications such as heat generation, gas production, or smoke effects. Typically solid assemblies in various forms and colors depending on composition. |
| Flash Point | Not applicable (pyrotechnic article) |
| Boiling Point | Not applicable (pyrotechnic article) |
| Vapor Density | Not applicable (solid article) |
| Water Reactivity | May vary by composition; some pyrotechnics react with water producing flammable gases or heat |
| Extinguishing | Dry sand, dry chemical powder; avoid water if reactive components present |
| PPE | ⚠️ Level D minimum for handling intact articles; Level C with SCBA if burning or smoke present; fire proximity requires full turnout gear and SCBA |
| Isolation | ERG 114: isolate spill or leak area immediately for at least 50 meters in all directions; if fire or explosion occurs, evacuate 800 meters in all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Minor blast or fire hazard — limited effect.
- Localized burning or deflagration possible.
- Smoke and heat from burning.
- Low mass explosion risk under normal conditions.
First actions (field-minded)
- CALL 911. Notify law enforcement.
- Isolate area; keep unauthorized personnel away.
- Stage upwind; eliminate ignition sources.
- Request Hazmat + law enforcement.
- Consult current ERG Guide 114 and follow SOP/SOG.
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UN 0431 — Articles, pyrotechnic for technical purp HAZMAT RADIO NOTE — UN 0431
Product: Articles, pyrotechnic for technical purposes
Class 1 / Explosive 1.4G / ERG 114
PPE: Level D minimum for handling intact articles; Level C with SCBA if burning or smoke present; fire proximity requires full turnout gear and SCBA
ISOLATION: ERG 114: isolate spill or leak area immediately for at least 50 meters in all directions; if fire or explosion occurs, evacuate 800 meters in all directions
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 0431 — Articles, pyrotechnic for technical purposes
Class: 1 | Placard: Explosive 1.4G | ERG Guide: 114
Appearance: Manufactured articles containing pyrotechnic substances designed for technical applications such as heat generation, gas production, or smoke effects. Typically solid assemblies in various forms and colors depending on composition.
Water Reactivity: May vary by composition; some pyrotechnics react with water producing flammable gases or heat
Extinguishing: Dry sand, dry chemical powder; avoid water if reactive components present
PPE: Level D minimum for handling intact articles; Level C with SCBA if burning or smoke present; fire proximity requires full turnout gear and SCBA
Isolation: ERG 114: isolate spill or leak area immediately for at least 50 meters in all directions; if fire or explosion occurs, evacuate 800 meters in all directions
— Key Hazards —
• Minor blast or fire hazard — limited effect.
• Localized burning or deflagration possible.
• Smoke and heat from burning.
— First Actions —
• CALL 911. Notify law enforcement.
• Isolate area; keep unauthorized personnel away.
• Stage upwind; eliminate ignition sources.
• Request Hazmat + law enforcement.
SOURCE: allfirefighter.com/hazmat/un/0431 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0431 Articles, pyrotechnic for technical purposes Cls1 ERG114 | allfirefighter.com/hazmat/un/0431SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/0431
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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FAQ
Minor blast or fire hazard — limited effect. Localized burning or deflagration possible. Smoke and heat from burning. Low mass explosion risk under normal conditions.
CALL 911. Notify law enforcement. Isolate area; keep unauthorized personnel away. Stage upwind; eliminate ignition sources.
Level D minimum for handling intact articles; Level C with SCBA if burning or smoke present; fire proximity requires full turnout gear and SCBA
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 114 and your department SOP/SOG for incident-specific protective actions.
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.