☣️ UN 1583 • CLASS 6

UN 1583 — Chloropicrin mixture, n.o.s.

Placard: Toxic. ERG Guide 154. 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 1583 is Chloropicrin mixture, n.o.s., a highly toxic chloropicrin material assigned to ERG Guide 154. It is known for intense eye and respiratory irritation and heavy vapors that can collect in low areas.

Hazard overview: UN 1583 presents toxic inhalation, lachrymator and contaminated-runoff hazards. It is generally nonflammable, but heating or fire may produce corrosive and toxic decomposition gases.

Response guidance: For a UN 1583 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 154. 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 1583 should emphasize chloropicrin vapor toxicity, eye/respiratory irritation, heavier-than-air vapor spread, decontamination and strict entry control. Common errors include relying on odor and underestimating low-area vapor accumulation.

Regulatory context: Chloropicrin mixture, n.o.s. is regulated as a toxic hazardous material. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, 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: Chloropicrin mixture, n.o.s. should be stored in tightly closed compatible containers in a secure, cool, well-ventilated toxic-material area away from heat, incompatible chemicals and unauthorized access. Storage should control vapor release, leaks and contaminated runoff.

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UN 1583 Quick Details

UN 1583
Product name: Chloropicrin mixture, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills

Common Hazards of UN 1583

  • HIGHLY TOXIC irritant/lachrymator liquid or mixture; inhalation can cause severe respiratory injury.
  • Vapors are much heavier than air and may collect in low or confined areas.
  • Strong eye and respiratory irritation may occur at very low concentrations.
  • Non-flammable, but heating or fire may produce toxic and corrosive decomposition gases.
  • Skin or eye contact with liquid can cause serious injury.
  • Runoff may carry toxic contamination to drains or waterways.
  • Containers may rupture or fail when heated.

Chemical Identity & Physical Properties

Colorless to faintly yellow oily liquid with an intensely irritating odor. Slightly volatile at room temperature. Non-flammable but decomposes on heating.

Also known asTrichloronitromethaneNitrochloroformPSNitrotrichloromethaneAcquinite
CAS Number76-06-2
AppearanceColorless to faintly yellow oily liquid with an intensely irritating odor. Slightly volatile at room temperature. Non-flammable but decomposes on heating.
Flash PointNot applicable (non-flammable)
Boiling Point112C (234F)
Vapor Density5.7 (much heavier than air)
Water ReactivityHydrolyzes slowly in water; no violent reaction
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1583

Extinguishing Media

Use water spray, dry chemical, CO2 or compatible agents for surrounding fire from a protected position. Fire-control runoff should be contained as toxic contamination.

PPE Requirements

⚠️ Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact

Use positive-pressure SCBA and chemical protective clothing selected by hazmat specialists for any vapor, liquid or unknown exposure. Level A is often appropriate for close entry because toxic vapor and skin absorption hazards may be severe.

Isolation & Evacuation

ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).

First Actions for a UN 1583 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.
  • 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 vapor, dust, fire involvement or unknown concentration is present.
  • Use ERG Guide 154, shipping papers, SDS, air monitoring and incident command for protective actions.
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📋 Copy & Share Field Card

UN 1583 — Chloropicrin mixture, n.o.s.
HAZMAT RADIO NOTE — UN 1583 Product: Chloropicrin mixture, n.o.s. Class 6 / Toxic / ERG 154 PPE: Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact ISOLATION: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills 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 1583 — Chloropicrin mixture, n.o.s. Class: 6 | Placard: Toxic | ERG Guide: 154 Appearance: Colorless to faintly yellow oily liquid with an intensely irritating odor. Slightly volatile at room temperature. Non-flammable but decomposes on heating. Water Reactivity: Hydrolyzes slowly in water; no violent reaction Extinguishing: Use water spray, dry chemical, CO2 or compatible agents for surrounding fire from a protected position. Fire-control runoff should be contained as toxic contamination. PPE: Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact Isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills — Key Hazards — • HIGHLY TOXIC irritant/lachrymator liquid or mixture; inhalation can cause severe respiratory injury. • Vapors are much heavier than air and may collect in low or confined areas. • Strong eye and respiratory irritation may occur at very low concentrations. — 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/chloropicrin-mixture-n-o-un-1583 | Always use current ERG + SOP/SOGIC BRIEFING

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

SMS (short)
UN1583 Chloropicrin mixture, n.o.s. Cls6 ERG154 | allfirefighter.com/hazmat/un/chloropicrin-mixture-n-o-un-1583SMS / 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/chloropicrin-mixture-n-o-un-1583

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 1583

UN 1583 is Chloropicrin mixture, n.o.s., a toxic hazardous material assigned to ERG Guide 154.

No. It is generally nonflammable, but heating or fire may produce toxic decomposition gases.

ERG Guide 154 applies to UN 1583 for initial isolation, protective actions and first response guidance.

UN 1583 presents toxic inhalation, lachrymator and contaminated-runoff hazards. It is generally nonflammable, but heating or fire may produce corrosive and toxic decomposition gases.

Use positive-pressure SCBA and chemical protective clothing selected by hazmat specialists for any vapor, liquid or unknown exposure. Level A is often appropriate for close entry because toxic vapor and skin absorption hazards may be severe.

Chloropicrin vapor is highly irritating and toxic; heating or fire can also produce toxic and corrosive decomposition gases.
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.