☣️ UN 2783 • CLASS 6

UN 2783 — Organophosphorus pesticide, solid, poisonous

Placard: Toxic. ERG Guide 152. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.

🚒☣️
⚠️ Verification required: Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.

Organophosphorus pesticide, solid, poisonous is a variable toxic pesticide solid. Appearance, active ingredient and concentration can differ, so SDS and shipping papers drive final response decisions.

Hazard overview: Organophosphorus pesticide may be highly toxic by inhalation, ingestion or skin absorption. Liquid or dust contact can irritate or burn skin and eyes depending on the formulation. Fire or heating may produce irritating, toxic and corrosive decomposition products.

Response guidance: For a Organophosphorus pesticide, solid, poisonous release, isolate the area, remove ignition sources if present, and keep runoff out of drains. Responders should use SCBA with chemical-resistant clothing and base tactics on SDS, shipping papers and monitoring.

Firefighter training notes: Train responders to identify the UN number, product name, placard, container type and exposure route before committing personnel to the hot zone.

Regulatory context: Use the proper DOT shipping description, ERG guide, SDS and site-specific response plan; do not substitute this summary for regulatory compliance.

Storage & handling: Store in sealed containers away from food/feed, incompatible chemicals, drains, heat and moisture; prevent dust release.

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UN 2783 Quick Details

UN 2783
Product name: Organophosphorus pesticide, solid, poisonous
DOT Class: 6
Placard type: Toxic
ERG Guide: 152 (check current ERG)
Initial isolation: Use the ERG guide initial isolation distance and increase for large spills, fire, dust release, drainage paths or downwind exposure.

Common Hazards of UN 2783

  • Organophosphorus pesticide may be highly toxic by inhalation, ingestion or skin absorption.
  • Liquid or dust contact can irritate or burn skin and eyes depending on the formulation.
  • Fire or heating may produce irritating, toxic and corrosive decomposition products.
  • Runoff, wash water and contaminated absorbent can carry pesticide into drains or waterways.
  • Exact active ingredient, solvent carrier and concentration must be verified from SDS and shipping papers.
  • The product may not burn readily, but packaging or contaminated material can burn in a fire.
  • Dust or residues should not be dispersed during cleanup.
  • Containers may rupture when heated.

Chemical Identity & Physical Properties

Solid material varying in color from white to tan or brown depending on specific compound. May be crystalline, granular, or powder form. Odor ranges from odorless to garlic-like or fruity depending on formulation.

Also known asorganophosphate pesticideorganophosphorus insecticideOP pesticide solidphosphoric acid ester pesticide
AppearanceSolid material varying in color from white to tan or brown depending on specific compound. May be crystalline, granular, or powder form. Odor ranges from odorless to garlic-like or fruity depending on formulation.
Flash PointVaries by specific compound; many are combustible solids with flash points above 93C (200F)
Boiling PointNot applicable (solid material, may decompose before melting)
Vapor DensityNot applicable (solid at room temperature)
Water ReactivityNo violent water reaction is expected, but wetting can create toxic runoff or slurry; keep material out of drains.
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 2783

Extinguishing Media

Dry chemical, CO2, water spray or foam may be used for surrounding fires; avoid dispersing dust or contaminated runoff.

PPE Requirements

⚠️ SCBA with chemical-resistant suit and gloves; Level A or B may be needed for dust, vapor, unknown concentration or skin-absorption risk.

Level A or B required; full-face SCBA mandatory; chemical-resistant suit with double gloves; zero skin contact tolerance due to dermal absorption hazard

Isolation & Evacuation

Use the ERG guide initial isolation distance and increase for large spills, fire, dust release, drainage paths or downwind exposure.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 152).

First Actions for a UN 2783 Incident

  • Call 911 and the emergency response number shown on the shipping papers.
  • Keep unauthorized personnel away and establish an initial isolation perimeter.
  • Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect.
  • Avoid breathing vapors, dust, mist or smoke and prevent skin and eye contact.
  • Do not touch damaged packages, leaking containers or spilled material without appropriate PPE.
  • Ventilate confined spaces only when responders are trained, equipped and monitoring conditions.
  • Use ERG, SDS, shipping papers and air monitoring to set final isolation, evacuation and decon actions.
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📋 Copy & Share Field Card

UN 2783 — Organophosphorus pesticide, solid, poiso
HAZMAT RADIO NOTE — UN 2783 Product: Organophosphorus pesticide, solid, poisonous Class 6 / Toxic / ERG 152 PPE: SCBA with chemical-resistant suit and gloves; Level A or B may be needed for dust, vapor, unknown concentration or skin-absorption risk. ISOLATION: Use the ERG guide initial isolation distance and increase for large spills, fire, dust release, drainage paths or downwind exposure. 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 2783 — Organophosphorus pesticide, solid, poisonous Class: 6 | Placard: Toxic | ERG Guide: 152 Appearance: Solid material varying in color from white to tan or brown depending on specific compound. May be crystalline, granular, or powder form. Odor ranges from odorless to garlic-like or fruity depending on formulation. Water Reactivity: No violent water reaction is expected, but wetting can create toxic runoff or slurry; keep material out of drains. Extinguishing: Dry chemical, CO2, water spray or foam may be used for surrounding fires; avoid dispersing dust or contaminated runoff. PPE: SCBA with chemical-resistant suit and gloves; Level A or B may be needed for dust, vapor, unknown concentration or skin-absorption risk. Isolation: Use the ERG guide initial isolation distance and increase for large spills, fire, dust release, drainage paths or downwind exposure. — Key Hazards — • Organophosphorus pesticide may be highly toxic by inhalation, ingestion or skin absorption. • Liquid or dust contact can irritate or burn skin and eyes depending on the formulation. • Fire or heating may produce irritating, toxic and corrosive decomposition products. — First Actions — • Call 911 and the emergency response number shown on the shipping papers. • Keep unauthorized personnel away and establish an initial isolation perimeter. • Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect. • Avoid breathing vapors, dust, mist or smoke and prevent skin and eye contact. SOURCE: allfirefighter.com/hazmat/un/organophosphorus-pesticide-solid-poisonous-un-2783 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)
UN2783 Organophosphorus pesticide, solid, poisonous Cls6 ERG152 | allfirefighter.com/hazmat/un/organophosphorus-pesticide-solid-poisonous-un-2783SMS / 160 CHAR

Use for: Quick text to command or incoming units. Fits in a single SMS.

Open in Messages WhatsApp
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/organophosphorus-pesticide-solid-poisonous-un-2783

Related UN Numbers in Class 6

Open Class Guide →Hazmat Hub →
UN 1098UN 1135UN 1163UN 1181UN 1182UN 1238UN 1239UN 1244UN 1259UN 1510UN 1541UN 1544
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 2783

UN 2783 covers Organophosphorus pesticide, solid, poisonous. Use the shipping papers and SDS to confirm the exact product before choosing tactics.

Yes. Exposure may be harmful or fatal by inhalation, ingestion or skin absorption, depending on concentration and formulation.

It is not classed as a flammable liquid, but it may decompose or involve combustible packaging in a fire.

No violent water reaction is expected, but water can create toxic runoff or spread residues.

Dry chemical, CO2, or water spray acceptable; foam may be used for large fires

Use SCBA and chemical-resistant protective clothing. Level A or B may be needed when vapors, splash risk or product identity is uncertain.

This entry can cover different formulations, active ingredients and solvents, so response details may change by product.
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.
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