☣️ UN 1658 • CLASS 6
UN 1658 — Nicotine sulphate, solution
Placard: Toxic. ERG Guide 151. 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 1658 Quick Details
UN 1658
Product name: Nicotine sulphate, solution
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: Isolate spill or leak area immediately for at least 25-50 meters in all directions; evacuate immediate area if large spill; highly toxic, avoid all contact
Common Hazards of UN 1658
- 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 | Nicotine sulfateNicotine bisulfateBlack Leaf 40Nicotinium sulfate solution |
| CAS Number | 65-30-5 |
| Appearance | Dark brown to black liquid with a faint tobacco-like or fishy odor. Highly toxic organic compound dissolved in water. |
| Flash Point | Not applicable (aqueous solution) |
| Boiling Point | Approximately 100C (212F) for aqueous solution |
| Vapor Density | Not applicable (aqueous solution, non-volatile) |
| Water Reactivity | Miscible with water, no significant reaction |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1658
Extinguishing Media
Water spray, foam, dry chemical, CO2 acceptable
PPE Requirements
⚠️ Level A or B minimum; full-face SCBA required; chemical-resistant suit and gloves mandatory; highly toxic by all routes of exposure
Isolation & Evacuation
ERG 151: Isolate spill or leak area immediately for at least 25-50 meters in all directions; evacuate immediate area if large spill; highly toxic, avoid all contact
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 1658 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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📋 Copy & Share Field Card
UN 1658 — Nicotine sulphate, solutionHAZMAT RADIO NOTE — UN 1658
Product: Nicotine sulphate, solution
Class 6 / Toxic / ERG 151
PPE: Level A or B minimum; full-face SCBA required; chemical-resistant suit and gloves mandatory; highly toxic by all routes of exposure
ISOLATION: ERG 151: Isolate spill or leak area immediately for at least 25-50 meters in all directions; evacuate immediate area if large spill; highly toxic, avoid all contact
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 1658 — Nicotine sulphate, solution
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Dark brown to black liquid with a faint tobacco-like or fishy odor. Highly toxic organic compound dissolved in water.
Water Reactivity: Miscible with water, no significant reaction
Extinguishing: Water spray, foam, dry chemical, CO2 acceptable
PPE: Level A or B minimum; full-face SCBA required; chemical-resistant suit and gloves mandatory; highly toxic by all routes of exposure
Isolation: ERG 151: Isolate spill or leak area immediately for at least 25-50 meters in all directions; evacuate immediate area if large spill; highly toxic, avoid all contact
— 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/1658 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1658 Nicotine sulphate, solution Cls6 ERG151 | allfirefighter.com/hazmat/un/1658SMS / 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/1658
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Frequently Asked Questions about UN 1658
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 minimum; full-face SCBA required; chemical-resistant suit and gloves mandatory; highly toxic by all routes of exposure
Water reactivity: Miscible with water, no significant reaction. Recommended extinguishing: Water spray, foam, dry chemical, CO2 acceptable.
ERG Guide 151 recommendation: ERG 151: Isolate spill or leak area immediately for at least 25-50 meters in all directions; evacuate immediate area if large spill; highly toxic, avoid all contact
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.