☣️ UN 1578 • CLASS 6
UN 1578 — Chloronitrobenzenes, solid
Placard: Toxic. ERG Guide 152. 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.
Chloronitrobenzenes, solid is a highly toxic substance that requires immediate attention in the event of an emergency. It can cause severe injury through inhalation, ingestion, or skin contact.
Hazard overview: Chloronitrobenzenes, solid is a highly toxic substance that can cause severe injury through inhalation, ingestion, or skin contact. Contact with molten substance may cause severe burns to skin and eyes.
Response guidance: In the event of an emergency, isolate the spill with a 25m radius and evacuate 300m downwind for large spills. If a tank or rail car is involved in a fire, isolate 800m all directions.
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UN 1578 Quick Details
UN 1578
Product name: Chloronitrobenzenes, solid
DOT Class: 6
Placard type: Toxic
ERG Guide: 152 (check current ERG)
Initial isolation: ERG 152: isolate spill 25m all directions; if tank/rail car involved in fire isolate 800m all directions; consider evacuation 300m downwind for large spills
Common Hazards of UN 1578
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- Contact with molten substance may cause severe burns to skin and eyes.
- 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
- Combustible material: may burn but does not ignite readily.
- Containers may explode when heated.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
Chemical Identity & Physical Properties
Chloronitrobenzenes, solid appears as a yellow to pale yellow crystalline solid at room temperature with a characteristic aromatic odor.
| Also known as | NitrochlorobenzeneChlorinated nitrobenzeneCNBp-Chloronitrobenzeneo-Chloronitrobenzenem-Chloronitrobenzene |
| Appearance | Yellow to pale yellow crystalline solid at room temperature. Characteristic aromatic odor. May appear as colorless to light yellow crystals or powder depending on isomer. |
| Flash Point | 127C (261F) typical for solid isomers |
| Boiling Point | 235-242C (455-468F) depending on isomer |
| Vapor Density | 5.4-5.5 (much heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble in water but dissolves in organic solvents |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1578
Extinguishing Media
Dry chemical, CO2, water spray, alcohol-resistant foam; avoid direct water streams on solid material
PPE Requirements
⚠️ Level A or B required; full-face SCBA mandatory; chemical-resistant suit necessary due to skin absorption hazard; double gloves recommended
Level A or B required PPE, including a full-face SCBA, chemical-resistant suit, and double gloves recommended due to skin absorption hazard.
Isolation & Evacuation
ERG 152: isolate spill 25m all directions; if tank/rail car involved in fire isolate 800m all directions; consider evacuation 300m downwind for large spills
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 152).
First Actions for a UN 1578 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 1578 — Chloronitrobenzenes, solidHAZMAT RADIO NOTE — UN 1578
Product: Chloronitrobenzenes, solid
Class 6 / Toxic / ERG 152
PPE: Level A or B required; full-face SCBA mandatory; chemical-resistant suit necessary due to skin absorption hazard; double gloves recommended
ISOLATION: ERG 152: isolate spill 25m all directions; if tank/rail car involved in fire isolate 800m all directions; consider evacuation 300m downwind 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.
=== IC HAZMAT BRIEFING ===
UN 1578 — Chloronitrobenzenes, solid
Class: 6 | Placard: Toxic | ERG Guide: 152
Appearance: Yellow to pale yellow crystalline solid at room temperature. Characteristic aromatic odor. May appear as colorless to light yellow crystals or powder depending on isomer.
Water Reactivity: No significant reaction with water; slightly soluble in water but dissolves in organic solvents
Extinguishing: Dry chemical, CO2, water spray, alcohol-resistant foam; avoid direct water streams on solid material
PPE: Level A or B required; full-face SCBA mandatory; chemical-resistant suit necessary due to skin absorption hazard; double gloves recommended
Isolation: ERG 152: isolate spill 25m all directions; if tank/rail car involved in fire isolate 800m all directions; consider evacuation 300m downwind for large spills
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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/1578 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1578 Chloronitrobenzenes, solid Cls6 ERG152 | allfirefighter.com/hazmat/un/1578SMS / 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/chloronitrobenzenes-solid-un-1578
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Frequently Asked Questions about UN 1578
Yes, it can cause severe injury through inhalation, ingestion, or skin contact.
Level A or B required PPE, including a full-face SCBA, chemical-resistant suit, and double gloves recommended.
Dry chemical, CO2, water spray, and alcohol-resistant foam.
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.