☣️ UN 1655 • CLASS 6
UN 1655 — Nicotine preparation, solid, n.o.s.
Placard: Toxic. ERG Guide 151. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 1655 Quick Details
UN 1655
Product name: Nicotine preparation, solid, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: Isolate spill area immediate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind; treat as extremely toxic by all routes of exposure
Common Hazards of UN 1655
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Containers may explode when heated.
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
| Also known as | Nicotine3-(1-Methyl-2-pyrrolidinyl)pyridineBlack LeafNikotinNicotine salts |
| CAS Number | 54-11-5 |
| Appearance | Solid preparation containing nicotine; may appear as powder, granules, or impregnated material; color varies by formulation from tan to dark brown; may have characteristic tobacco-like odor. |
| Flash Point | Varies by formulation; pure nicotine: 95C (203F); solid preparations may be higher or not applicable depending on carrier material |
| Boiling Point | 247C (477F) for pure nicotine; not applicable for solid preparations |
| Vapor Density | Not applicable (solid preparation) |
| Water Reactivity | No significant reaction; nicotine is water-soluble but solid preparations typically dissolve rather than react |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1655
Extinguishing Media
Dry chemical, CO2, water spray for small fires; avoid direct water streams that may spread contamination
PPE Requirements
⚠️ Level A or B required; full chemical protective suit with SCBA; double gloves essential due to rapid dermal absorption; any skin contact can be fatal
Isolation & Evacuation
ERG 151: Isolate spill area immediate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind; treat as extremely toxic by all routes of exposure
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 1655 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 1655 — Nicotine preparation, solid, n.o.s.HAZMAT RADIO NOTE — UN 1655
Product: Nicotine preparation, solid, n.o.s.
Class 6 / Toxic / ERG 151
PPE: Level A or B required; full chemical protective suit with SCBA; double gloves essential due to rapid dermal absorption; any skin contact can be fatal
ISOLATION: ERG 151: Isolate spill area immediate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind; treat as extremely toxic by all routes of exposure
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 1655 — Nicotine preparation, solid, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Solid preparation containing nicotine; may appear as powder, granules, or impregnated material; color varies by formulation from tan to dark brown; may have characteristic tobacco-like odor.
Water Reactivity: No significant reaction; nicotine is water-soluble but solid preparations typically dissolve rather than react
Extinguishing: Dry chemical, CO2, water spray for small fires; avoid direct water streams that may spread contamination
PPE: Level A or B required; full chemical protective suit with SCBA; double gloves essential due to rapid dermal absorption; any skin contact can be fatal
Isolation: ERG 151: Isolate spill area immediate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind; treat as extremely toxic by all routes of exposure
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/1655 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1655 Nicotine preparation, solid, n.o.s. Cls6 ERG151 | allfirefighter.com/hazmat/un/1655SMS / 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/1655
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Frequently Asked Questions about UN 1655
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. Avoid any skin contact. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Containers may explode when heated. Runoff may pollute waterways.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level A or B required; full chemical protective suit with SCBA; double gloves essential due to rapid dermal absorption; any skin contact can be fatal
Water reactivity: No significant reaction; nicotine is water-soluble but solid preparations typically dissolve rather than react. Recommended extinguishing: Dry chemical, CO2, water spray for small fires; avoid direct water streams that may spread contamination.
ERG Guide 151 recommendation: ERG 151: Isolate spill area immediate 25m in all directions; for large spills isolate 50m and consider evacuation 300m downwind; treat as extremely toxic by all routes of exposure
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.