☣️ UN 3083 • CLASS 2
UN 3083 — Perchloryl fluoride
Placard: Toxic Gas. ERG Guide 124. 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 3083 Quick Details
UN 3083
Product name: Perchloryl fluoride
DOT Class: 2
Placard type: Toxic Gas
ERG Guide: 124 (check current ERG)
Initial isolation: ERG 124: initial isolate 100m all directions; protective action distance 0.3 km day / 0.8 km night for small spills, 1.1 km day / 3.2 km night for large spills
Common Hazards of UN 3083
- TOXIC and/or CORROSIVE; may be fatal if inhaled or absorbed through skin.
- Fire will produce irritating, corrosive and/or toxic gases.
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Runoff from fire control or dilution water may cause environmental contamination.
- Substance does not burn but will support combustion.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- These are strong oxidizers and will react vigorously or explosively with many materials including fuels.
- May ignite combustibles (wood, paper, oil, clothing, etc.).
Chemical Identity & Physical Properties
| Also known as | Chlorine oxyfluoridePerchlorofluorideChlorine fluoride oxideTrioxychlorofluoride |
| CAS Number | 7616-94-6 |
| Appearance | Colorless gas with a characteristic sweet odor. Shipped as a liquefied compressed gas under pressure. |
| Flash Point | Not applicable (nonflammable gas) |
| Boiling Point | -46.8C (-52.2F) |
| Vapor Density | 3.6 (heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water forming hydrofluoric and perchloric acids; corrosive products |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3083
Extinguishing Media
Nonflammable; use water spray to reduce vapors, do not direct water at source
PPE Requirements
⚠️ Level A minimum for initial response; full chemical protective suit with SCBA required; material is highly toxic by inhalation
Isolation & Evacuation
ERG 124: initial isolate 100m all directions; protective action distance 0.3 km day / 0.8 km night for small spills, 1.1 km day / 3.2 km night for large spills
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 124).
First Actions for a UN 3083 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.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- See Table 1 - Initial Isolation and Protective Action Distances.
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📋 Copy & Share Field Card
UN 3083 — Perchloryl fluorideHAZMAT RADIO NOTE — UN 3083
Product: Perchloryl fluoride
Class 2 / Toxic Gas / ERG 124
PPE: Level A minimum for initial response; full chemical protective suit with SCBA required; material is highly toxic by inhalation
ISOLATION: ERG 124: initial isolate 100m all directions; protective action distance 0.3 km day / 0.8 km night for small spills, 1.1 km day / 3.2 km night 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 3083 — Perchloryl fluoride
Class: 2 | Placard: Toxic Gas | ERG Guide: 124
Appearance: Colorless gas with a characteristic sweet odor. Shipped as a liquefied compressed gas under pressure.
Water Reactivity: Hydrolyzes slowly in water forming hydrofluoric and perchloric acids; corrosive products
Extinguishing: Nonflammable; use water spray to reduce vapors, do not direct water at source
PPE: Level A minimum for initial response; full chemical protective suit with SCBA required; material is highly toxic by inhalation
Isolation: ERG 124: initial isolate 100m all directions; protective action distance 0.3 km day / 0.8 km night for small spills, 1.1 km day / 3.2 km night for large spills
— Key Hazards —
• TOXIC and/or CORROSIVE; may be fatal if inhaled or absorbed through skin.
• Fire will produce irritating, corrosive and/or toxic gases.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
— 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.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/3083 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3083 Perchloryl fluoride Cls2 ERG124 | ERG 124: initial isolate 100m all directions; protective action distance 0.3 km | allfirefighter.com/hazmat/un/3083SMS / 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/3083
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Frequently Asked Questions about UN 3083
TOXIC and/or CORROSIVE; may be fatal if inhaled or absorbed through skin. Fire will produce irritating, corrosive and/or toxic gases. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Runoff from fire control or dilution water may cause environmental contamination. Substance does not burn but will support combustion. Vapors from liquefied gas are initially heavier than air and spread along ground. These are strong oxidizers and will react vigorously or explosively with many materials including fuels. May ignite combustibles (wood, paper, oil, clothing, etc.).
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 minimum for initial response; full chemical protective suit with SCBA required; material is highly toxic by inhalation
Water reactivity: Hydrolyzes slowly in water forming hydrofluoric and perchloric acids; corrosive products. Recommended extinguishing: Nonflammable; use water spray to reduce vapors, do not direct water at source.
ERG Guide 124 recommendation: ERG 124: initial isolate 100m all directions; protective action distance 0.3 km day / 0.8 km night for small spills, 1.1 km day / 3.2 km night for large spills
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 124 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.