☣️ UN 0197 • CLASS 1
UN 0197 — Signals, smoke
Placard: Explosive 1.4G. ERG Guide 114. 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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UN 0197 Quick Details
UN 0197
Product name: Signals, smoke
DOT Class: 1
Placard type: Explosive 1.4G
ERG Guide: 114 (check current ERG)
Initial isolation: ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, isolate 80m and consider evacuation for 160m downwind
Common Hazards of UN 0197
- Minor blast or fire hazard — limited effect.
- Localized burning or deflagration possible.
- Smoke and heat from burning.
- Low mass explosion risk under normal conditions.
Chemical Identity & Physical Properties
| Also known as | Smoke signalsPyrotechnic smoke devicesMarine smoke signalsDistress smoke signalsSignal smoke cartridges |
| Appearance | Solid pyrotechnic devices containing metal powders, oxidizers, and organic fuels. Typically cylindrical cartridges or candles in various colors (orange, red, white). No odor until ignited, then produces dense colored smoke. |
| Flash Point | Not applicable (pyrotechnic solid) |
| Boiling Point | Not applicable (decomposes/burns) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | May react with some formulations containing reactive metals; generally stable when wet but should be kept dry for reliability |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0197
Extinguishing Media
Dry chemical, sand, or water spray for small fires; foam acceptable for cooling adjacent materials
PPE Requirements
⚠️ Level D for intact devices; Level C with respiratory protection if burning (smoke inhalation hazard)
Isolation & Evacuation
ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, isolate 80m and consider evacuation for 160m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 114).
First Actions for a UN 0197 Incident
- 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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📋 Copy & Share Field Card
UN 0197 — Signals, smokeHAZMAT RADIO NOTE — UN 0197
Product: Signals, smoke
Class 1 / Explosive 1.4G / ERG 114
PPE: Level D for intact devices; Level C with respiratory protection if burning (smoke inhalation hazard)
ISOLATION: ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, isolate 80m and consider evacuation for 160m downwind
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 0197 — Signals, smoke
Class: 1 | Placard: Explosive 1.4G | ERG Guide: 114
Appearance: Solid pyrotechnic devices containing metal powders, oxidizers, and organic fuels. Typically cylindrical cartridges or candles in various colors (orange, red, white). No odor until ignited, then produces dense colored smoke.
Water Reactivity: May react with some formulations containing reactive metals; generally stable when wet but should be kept dry for reliability
Extinguishing: Dry chemical, sand, or water spray for small fires; foam acceptable for cooling adjacent materials
PPE: Level D for intact devices; Level C with respiratory protection if burning (smoke inhalation hazard)
Isolation: ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, isolate 80m and consider evacuation for 160m downwind
— 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/0197 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0197 Signals, smoke Cls1 ERG114 | ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, | allfirefighter.com/hazmat/un/0197SMS / 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/0197
Related UN Numbers in Class 1
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 0197
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 for intact devices; Level C with respiratory protection if burning (smoke inhalation hazard)
Water reactivity: May react with some formulations containing reactive metals; generally stable when wet but should be kept dry for reliability. Recommended extinguishing: Dry chemical, sand, or water spray for small fires; foam acceptable for cooling adjacent materials.
ERG Guide 114 recommendation: ERG 114: isolate spill/leak area 25m in all directions; if fire or large spill, isolate 80m and consider evacuation for 160m downwind
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.