☣️ UN 2407 • CLASS 6
UN 2407 — Isopropyl chloroformate
Placard: Toxic. ERG Guide 155. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
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UN 2407 Quick Details
UN 2407
Product name: Isopropyl chloroformate
DOT Class: 6
Placard type: Toxic
ERG Guide: 155 (check current ERG)
Initial isolation: ERG 155: isolate spill 25-50m; evacuate 800m downwind in large spill; consider 1600m if fire involved
Common Hazards of UN 2407
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapors may travel to source of ignition and flash back.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
Chemical Identity & Physical Properties
| Also known as | Isopropyl chlorocarbonateChloroformic acid isopropyl ester1-Methylethyl chloroformateIsopropoxycarbonyl chloride |
| CAS Number | 108-23-6 |
| Appearance | Colorless to pale yellow liquid with a pungent, irritating odor. Corrosive and lachrymatory (tear-producing) properties. |
| Flash Point | -17C (1F) |
| Boiling Point | 105C (221F) |
| Vapor Density | 4.3 (heavier than air) |
| Water Reactivity | Reacts with water releasing HCl (hydrochloric acid) and carbon dioxide; violent reaction with moisture |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2407
Extinguishing Media
CO2, dry chemical, dry sand; avoid water-based agents due to reactivity
PPE Requirements
⚠️ Level B minimum; SCBA required; full chemical-resistant suit due to corrosive vapors and liquid
Isolation & Evacuation
ERG 155: isolate spill 25-50m; evacuate 800m downwind in large spill; consider 1600m if fire involved
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 155).
First Actions for a UN 2407 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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
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📋 Copy & Share Field Card
UN 2407 — Isopropyl chloroformateHAZMAT RADIO NOTE — UN 2407
Product: Isopropyl chloroformate
Class 6 / Toxic / ERG 155
PPE: Level B minimum; SCBA required; full chemical-resistant suit due to corrosive vapors and liquid
ISOLATION: ERG 155: isolate spill 25-50m; evacuate 800m downwind in large spill; consider 1600m if fire involved
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 2407 — Isopropyl chloroformate
Class: 6 | Placard: Toxic | ERG Guide: 155
Appearance: Colorless to pale yellow liquid with a pungent, irritating odor. Corrosive and lachrymatory (tear-producing) properties.
Water Reactivity: Reacts with water releasing HCl (hydrochloric acid) and carbon dioxide; violent reaction with moisture
Extinguishing: CO2, dry chemical, dry sand; avoid water-based agents due to reactivity
PPE: Level B minimum; SCBA required; full chemical-resistant suit due to corrosive vapors and liquid
Isolation: ERG 155: isolate spill 25-50m; evacuate 800m downwind in large spill; consider 1600m if fire involved
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards.
• Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/2407 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2407 Isopropyl chloroformate Cls6 ERG155 | allfirefighter.com/hazmat/un/2407SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/2407
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Frequently Asked Questions about UN 2407
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapors may travel to source of ignition and flash back. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum; SCBA required; full chemical-resistant suit due to corrosive vapors and liquid
Water reactivity: Reacts with water releasing HCl (hydrochloric acid) and carbon dioxide; violent reaction with moisture. Recommended extinguishing: CO2, dry chemical, dry sand; avoid water-based agents due to reactivity.
ERG Guide 155 recommendation: ERG 155: isolate spill 25-50m; evacuate 800m downwind in large spill; consider 1600m if fire involved
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 155 and your department SOP/SOG for incident-specific protective actions.
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.