☣️ 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.

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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.

UN 1618 is Lead arsenites, a toxic arsenic and heavy-metal material assigned to ERG Guide 151. The main responder concern is preventing inhalation of dust and controlling contaminated runoff.

Hazard overview: UN 1618 presents arsenic plus heavy-metal dust, fume and runoff hazards. Dry powder can contaminate clothing and equipment, and heating may produce toxic metal-containing fumes.

Response guidance: For a UN 1618 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 151. Establish incident command, isolate the area, stay upwind, prevent dust or vapor exposure, control runoff and choose entry or cleanup actions based on monitoring, SDS and local SOP.

Firefighter training notes: Training for UN 1618 should emphasize arsenic/heavy-metal dust exposure, contamination control, SCBA use, runoff containment and decontamination. Common errors include spreading dry powder and treating nonflammable toxic solids as low risk. Use ERG 151, SDS and local SOP.

Regulatory context: Lead arsenites is regulated as a toxic arsenic/heavy-metal hazardous material. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by compound, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.

Storage & handling: Lead arsenites should be stored in tightly closed compatible containers in a secure, cool, dry, well-ventilated toxic-material area away from food, incompatible chemicals, heat and unauthorized access. Prevent dust release, leaks and contaminated runoff.

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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 arsenic and heavy-metal material; may be fatal if inhaled, ingested or absorbed through skin.
  • Dust or powder can create serious inhalation and contamination hazards.
  • Lead or mercury components may add persistent toxic contamination to surfaces, runoff and equipment.
  • Avoid skin contact and prevent dust from becoming airborne.
  • Fire or heating may produce toxic arsenic, lead or mercury fumes depending on the compound.
  • Runoff from fire control or spill control may pollute waterways.
  • Specific solubility and toxicity should be verified from SDS and shipping papers.

Chemical Identity & Physical Properties

White to grayish-white powder or crystalline solid. Odorless. Stable at room temperature as a solid.

Also known asLead arseniteArsenious acid lead saltLead(II) arsenitePlumbous arsenite
AppearanceWhite to grayish-white powder or crystalline solid. Odorless. Stable at room temperature as a solid.
Flash PointNot applicable (non-combustible inorganic solid)
Boiling PointNot applicable (decomposes before boiling)
Vapor DensityNot applicable (solid material)
Water ReactivitySlightly 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

Use extinguishing agents appropriate for the surrounding fire and SDS. Water spray may cool containers or reduce dust only when runoff can be controlled as toxic contamination.

PPE Requirements

⚠️ Level A or B required; full-face SCBA, chemical-resistant suit, double gloves; avoid any skin contact due to extreme toxicity

Use positive-pressure SCBA for dust, fumes, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid all skin contact and contaminated dust.

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

  • CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
  • Keep unauthorized personnel away.
  • Stay upwind, uphill and/or upstream.
  • Avoid breathing vapors, fumes, dust or mist and avoid all skin or eye contact.
  • Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
  • Avoid creating dust clouds or spreading contaminated powder, solution, runoff or debris.
  • Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
  • Isolate the spill or leak area and expand the perimeter if dust, vapor, fire involvement or unknown concentration is present.
  • Use ERG Guide 151, shipping papers, SDS, air monitoring and incident command for protective actions.
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📋 Copy & Share Field Card

UN 1618 — Lead arsenites
HAZMAT 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.

SMS WhatsApp
=== 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: Use extinguishing agents appropriate for the surrounding fire and SDS. Water spray may cool containers or reduce dust only when runoff can be controlled as toxic contamination. 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 arsenic and heavy-metal material; may be fatal if inhaled, ingested or absorbed through skin. • Dust or powder can create serious inhalation and contamination hazards. • Lead or mercury components may add persistent toxic contamination to surfaces, runoff and equipment. — First Actions — • CALL 911. Then call the emergency response telephone number on the shipping paper, if available. • Keep unauthorized personnel away. • Stay upwind, uphill and/or upstream. • Avoid breathing vapors, fumes, dust or mist and avoid all skin or eye contact. 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.

SMS (short)
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

Related UN Numbers in Class 6

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 1618

UN 1618 is Lead arsenites, a hazardous material assigned to ERG Guide 151.

No. It is generally not flammable, but fire or heating can produce toxic arsenic and heavy-metal fumes.

ERG Guide 151 applies to UN 1618 for initial isolation, protective actions and first response guidance.

UN 1618 presents arsenic plus heavy-metal dust, fume and runoff hazards. Dry powder can contaminate clothing and equipment, and heating may produce toxic metal-containing fumes.

Use positive-pressure SCBA for dust, fumes, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid all skin contact and contaminated dust.

Arsenic or heavy-metal dust can contaminate clothing, equipment and surfaces and may be dangerous by inhalation or ingestion.
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.