☣️ UN 1577 • CLASS 6

UN 1577 — Chlorodinitrobenzenes, liquid

Placard: Toxic. ERG Guide 153. 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 1577 is Chlorodinitrobenzenes, liquid, a toxic aromatic compound assigned to ERG Guide 153. It may be a solid or liquid, but responder priorities are skin absorption control, toxic smoke and runoff containment.

Hazard overview: UN 1577 presents toxic skin, inhalation and ingestion hazards. It may burn or decompose under fire conditions, producing irritating or toxic nitrogen/chlorine-containing gases.

Response guidance: For a UN 1577 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 153. 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 1577 should emphasize toxic aromatic compound exposure, skin absorption, dust/vapor control, runoff containment and toxic smoke. Use ERG 153, SDS and local SOP.

Regulatory context: Chlorodinitrobenzenes, liquid 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: Chlorodinitrobenzenes, liquid should be stored in tightly closed compatible containers in a secure toxic-material area according to SDS and local hazardous materials procedures.

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UN 1577 Quick Details

UN 1577
Product name: Chlorodinitrobenzenes, liquid
DOT Class: 6
Placard type: Toxic
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill 50m all directions; for large spill isolate 100m; evacuate 500m downwind if fire

Common Hazards of UN 1577

  • TOXIC aromatic nitro or amine compound; inhalation, ingestion or skin absorption may cause severe injury.
  • Combustible material: may burn but does not ignite readily.
  • Dust, vapor or molten/liquid contact may injure eyes, skin and respiratory tissue.
  • Vapors or decomposition products may be heavier than air and collect in low areas.
  • Fire may produce irritating, corrosive and/or toxic gases including nitrogen oxides and hydrogen chloride.
  • Runoff may be toxic and may pollute waterways.
  • Containers may rupture or fail when heated.

Chemical Identity & Physical Properties

Yellow to brown oily liquid with a characteristic aromatic odor. Toxic crystalline solid that may be shipped as a molten liquid.

Also known asChloro-dinitrobenzeneCDNBDinitrochlorobenzeneChlorodinitrobenzol
AppearanceYellow to brown oily liquid with a characteristic aromatic odor. Toxic crystalline solid that may be shipped as a molten liquid.
Flash Point194C (382F)
Boiling Point315C (599F)
Vapor Density7.0 (heavier than air)
Water ReactivityInsoluble in water; no significant reaction
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1577

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 minimum; full face SCBA required; chemical-resistant suit and gloves to prevent skin contact

Use positive-pressure SCBA for vapor, dust, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS because skin absorption may be significant.

Isolation & Evacuation

ERG 153: isolate spill 50m all directions; for large spill isolate 100m; evacuate 500m downwind if fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).

First Actions for a UN 1577 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, molten material or runoff.
  • 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 153, shipping papers, SDS, air monitoring and incident command for protective actions.
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📋 Copy & Share Field Card

UN 1577 — Chlorodinitrobenzenes, liquid
HAZMAT RADIO NOTE — UN 1577 Product: Chlorodinitrobenzenes, liquid Class 6 / Toxic / ERG 153 PPE: Level A or B minimum; full face SCBA required; chemical-resistant suit and gloves to prevent skin contact ISOLATION: ERG 153: isolate spill 50m all directions; for large spill isolate 100m; evacuate 500m downwind if fire 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 1577 — Chlorodinitrobenzenes, liquid Class: 6 | Placard: Toxic | ERG Guide: 153 Appearance: Yellow to brown oily liquid with a characteristic aromatic odor. Toxic crystalline solid that may be shipped as a molten liquid. Water Reactivity: Insoluble in water; no significant reaction 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 minimum; full face SCBA required; chemical-resistant suit and gloves to prevent skin contact Isolation: ERG 153: isolate spill 50m all directions; for large spill isolate 100m; evacuate 500m downwind if fire — Key Hazards — • TOXIC aromatic nitro or amine compound; inhalation, ingestion or skin absorption may cause severe injury. • Combustible material: may burn but does not ignite readily. • Dust, vapor or molten/liquid contact may injure eyes, skin and respiratory tissue. — 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/chlorodinitrobenzenes-liquid-un-1577 | Always use current ERG + SOP/SOGIC BRIEFING

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

SMS (short)
UN1577 Chlorodinitrobenzenes, liquid Cls6 ERG153 | allfirefighter.com/hazmat/un/chlorodinitrobenzenes-liquid-un-1577SMS / 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/chlorodinitrobenzenes-liquid-un-1577

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 1577

UN 1577 is Chlorodinitrobenzenes, liquid, a toxic hazardous material assigned to ERG Guide 153.

It may be combustible but does not ignite readily; toxic exposure and decomposition smoke are the main hazards.

ERG Guide 153 applies to UN 1577 for initial isolation, protective actions and first response guidance.

UN 1577 presents toxic skin, inhalation and ingestion hazards. It may burn or decompose under fire conditions, producing irritating or toxic nitrogen/chlorine-containing gases.

Use positive-pressure SCBA for vapor, dust, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS because skin absorption may be significant.

Some toxic aromatic compounds can be absorbed through skin or contaminate clothing and gloves, so chemical-resistant PPE and decontamination matter.
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.