☣️ UN 2495 • CLASS 5
UN 2495 — Iodine pentafluoride
Placard: Oxidizer. ERG Guide 144. 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.
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UN 2495 Quick Details
UN 2495
Product name: Iodine pentafluoride
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 144 (check current ERG)
Initial isolation: ERG 144: Initial isolation 100m all directions; protective action distance 800m downwind daytime (3000m nighttime) for large spills
Common Hazards of UN 2495
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- React vigorously and/or explosively with water.
- Produce toxic and/or corrosive substances on contact with water.
- Flammable/toxic gases may accumulate in tanks and hopper cars.
- Some may produce flammable hydrogen gas upon contact with metals.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
Chemical Identity & Physical Properties
| Also known as | Iodine(V) fluoridePentafluoroiodineIF5 |
| CAS Number | 7783-66-6 |
| Appearance | Colorless to pale yellow fuming liquid with a pungent, irritating odor. Fumes strongly in moist air forming corrosive hydrogen fluoride. |
| Flash Point | Not applicable (strong oxidizer, non-flammable but ignites combustibles) |
| Boiling Point | 100.5C (213F) |
| Vapor Density | 7.8 (much heavier than air) |
| Water Reactivity | Reacts violently and exothermically with water producing toxic and corrosive hydrogen fluoride and iodic acid vapors |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2495
Extinguishing Media
Dry chemical, dry sand only; NO water, NO foam, NO CO2
PPE Requirements
⚠️ Level A required; fully encapsulating suit with SCBA; highly corrosive to skin and respiratory tract
Isolation & Evacuation
ERG 144: Initial isolation 100m all directions; protective action distance 800m downwind daytime (3000m nighttime) for large spills
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 144).
First Actions for a UN 2495 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 2495 — Iodine pentafluorideHAZMAT RADIO NOTE — UN 2495
Product: Iodine pentafluoride
Class 5 / Oxidizer / ERG 144
PPE: Level A required; fully encapsulating suit with SCBA; highly corrosive to skin and respiratory tract
ISOLATION: ERG 144: Initial isolation 100m all directions; protective action distance 800m downwind daytime (3000m nighttime) 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 2495 — Iodine pentafluoride
Class: 5 | Placard: Oxidizer | ERG Guide: 144
Appearance: Colorless to pale yellow fuming liquid with a pungent, irritating odor. Fumes strongly in moist air forming corrosive hydrogen fluoride.
Water Reactivity: Reacts violently and exothermically with water producing toxic and corrosive hydrogen fluoride and iodic acid vapors
Extinguishing: Dry chemical, dry sand only; NO water, NO foam, NO CO2
PPE: Level A required; fully encapsulating suit with SCBA; highly corrosive to skin and respiratory tract
Isolation: ERG 144: Initial isolation 100m all directions; protective action distance 800m downwind daytime (3000m nighttime) for large spills
— Key Hazards —
• May ignite combustibles (wood, paper, oil, clothing, etc.).
• React vigorously and/or explosively with water.
• Produce toxic and/or corrosive substances on contact with water.
— 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/2495 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2495 Iodine pentafluoride Cls5 ERG144 | ERG 144: Initial isolation 100m all directions; protective action distance 800m | allfirefighter.com/hazmat/un/2495SMS / 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/2495
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Frequently Asked Questions about UN 2495
May ignite combustibles (wood, paper, oil, clothing, etc.). React vigorously and/or explosively with water. Produce toxic and/or corrosive substances on contact with water. Flammable/toxic gases may accumulate in tanks and hopper cars. Some may produce flammable hydrogen gas upon contact with metals. Containers may explode when heated. Runoff may create fire or explosion hazard. TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
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 A required; fully encapsulating suit with SCBA; highly corrosive to skin and respiratory tract
Water reactivity: Reacts violently and exothermically with water producing toxic and corrosive hydrogen fluoride and iodic acid vapors. Recommended extinguishing: Dry chemical, dry sand only; NO water, NO foam, NO CO2.
ERG Guide 144 recommendation: ERG 144: Initial isolation 100m all directions; protective action distance 800m downwind daytime (3000m nighttime) for large spills
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 144 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.