☣️ UN 1618 • CLASS 6
UN 1618 — Lead arsenites
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.
Lead arsenites are highly toxic substances that can be fatal if inhaled, ingested or absorbed through skin. They are often used in pesticides and fertilizers.
Hazard overview: Lead arsenites are highly toxic and may be fatal if inhaled, ingested or absorbed through skin. They can also contaminate water sources.
Response guidance: In case of emergency, isolate the spill area and evacuate the area. Use water spray, dry chemical or CO2 for adjacent fires.
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UN 1618 Quick Details
UN 1618
Product name: Lead arsenites
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: Isolate spill area at least 25m in all directions; if large spill or fire involved, isolate 800m and consider evacuation
Common Hazards of UN 1618
- 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
Lead arsenites are a white to grayish-white powder or crystalline solid, odorless and stable at room temperature as a solid.
| Also known as | Lead arseniteArsenious acid lead saltLead(II) arsenitePlumbous arsenite |
| Appearance | White to grayish-white powder or crystalline solid. Odorless. Stable at room temperature as a solid. |
| Flash Point | Not applicable (non-combustible inorganic solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Slightly soluble in water; releases toxic arsenic compounds upon dissolution |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1618
Extinguishing Media
Water spray, dry chemical, CO2; foam not typically required for non-combustible material
PPE Requirements
⚠️ Level A or B required; full-face SCBA, chemical-resistant suit, double gloves; avoid any skin contact due to extreme toxicity
Use Level A or B PPE with full-face SCBA, chemical-resistant suit and double gloves.
Isolation & Evacuation
ERG 151: Isolate spill area at least 25m in all directions; if large spill or fire involved, isolate 800m and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 1618 Incident
- 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 1618 — Lead arsenitesHAZMAT RADIO NOTE — UN 1618
Product: Lead arsenites
Class 6 / Toxic / ERG 151
PPE: Level A or B required; full-face SCBA, chemical-resistant suit, double gloves; avoid any skin contact due to extreme toxicity
ISOLATION: ERG 151: Isolate spill area at least 25m in all directions; if large spill or fire involved, isolate 800m and consider evacuation
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 1618 — Lead arsenites
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: White to grayish-white powder or crystalline solid. Odorless. Stable at room temperature as a solid.
Water Reactivity: Slightly soluble in water; releases toxic arsenic compounds upon dissolution
Extinguishing: Water spray, dry chemical, CO2; foam not typically required for non-combustible material
PPE: Level A or B required; full-face SCBA, chemical-resistant suit, double gloves; avoid any skin contact due to extreme toxicity
Isolation: ERG 151: Isolate spill area at least 25m in all directions; if large spill or fire involved, isolate 800m and consider evacuation
— 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 —
• 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.
SOURCE: allfirefighter.com/hazmat/un/lead-arsenites-un-1618 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1618 Lead arsenites Cls6 ERG151 | allfirefighter.com/hazmat/un/lead-arsenites-un-1618SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/lead-arsenites-un-1618
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Frequently Asked Questions about UN 1618
No, material itself is non-combustible.
Yes, releases toxic arsenic compounds upon dissolution.
Level A or B with full-face SCBA, chemical-resistant suit and double gloves.
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.