UN 1577 — Chlorodinitrobenzenes, liquid
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Chlorodinitrobenzenes, liquid is a highly toxic and corrosive substance that requires immediate attention in the event of an emergency. It can cause severe injury through inhalation, ingestion, or skin contact.
Hazard overview: Chlorodinitrobenzenes, liquid is a toxic and corrosive substance that can cause severe injury through inhalation, ingestion, or skin contact. Methyl bromoacetate (UN2643) is an eye irritant/lachrymator.
Response guidance: In the event of an emergency, isolate the spill with a 50m radius and evacuate 500m downwind if a fire is involved. For large spills, consider isolating 100m and evacuating 500m downwind.
UN 1577 Quick Details
Common Hazards of UN 1577
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
- 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.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
Chemical Identity & Physical Properties
Chlorodinitrobenzenes, liquid appears as a yellow to brown oily liquid with a characteristic aromatic odor.
| Also known as | Chloro-dinitrobenzeneCDNBDinitrochlorobenzeneChlorodinitrobenzol |
| Appearance | Yellow to brown oily liquid with a characteristic aromatic odor. Toxic crystalline solid that may be shipped as a molten liquid. |
| Flash Point | 194C (382F) |
| Boiling Point | 315C (599F) |
| Vapor Density | 7.0 (heavier than air) |
| Water Reactivity | Insoluble in water; no significant reaction |
Fireground Response Guidance — UN 1577
Extinguishing Media
PPE Requirements
Level A or B minimum PPE is required, including a full face SCBA, chemical-resistant suit, and gloves to prevent skin contact.
Isolation & Evacuation
First Actions for a UN 1577 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- 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
📋 Copy & Share Field Card
UN 1577 — Chlorodinitrobenzenes, liquidUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.