☣️ UN 3436 • CLASS 6
UN 3436 — Hexafluoroacetone hydrate, solid
Placard: Toxic. ERG Guide 151. 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.
Advertisement
UN 3436 Quick Details
UN 3436
Product name: Hexafluoroacetone hydrate, solid
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: isolate spill 25m in all directions; if tank/rail car involved in fire, isolate 800m and consider evacuation
Common Hazards of UN 3436
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Containers may explode when heated.
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
| Also known as | Hexafluoroacetone sesquihydrateHFA hydrate1,1,1,3,3,3-Hexafluoroacetone hydrateHexafluoro-2-propanone hydrate |
| CAS Number | 34619-12-0 |
| Appearance | White to off-white crystalline solid with a pungent, acrid odor. Stable at room temperature when hydrated. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Not applicable (solid form decomposes before melting) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water, releasing hexafluoroacetone which is highly irritating and toxic |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3436
Extinguishing Media
Dry chemical, CO2, or dry sand; water spray may be used to dilute spills but generates toxic vapors
PPE Requirements
⚠️ Level A or B required; full-face SCBA, chemical-resistant suit, butyl rubber gloves; avoid all skin contact
Isolation & Evacuation
ERG 151: isolate spill 25m in all directions; if tank/rail car involved in fire, isolate 800m and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 3436 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.
- 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
Advertisement
📋 Copy & Share Field Card
UN 3436 — Hexafluoroacetone hydrate, solidHAZMAT RADIO NOTE — UN 3436
Product: Hexafluoroacetone hydrate, solid
Class 6 / Toxic / ERG 151
PPE: Level A or B required; full-face SCBA, chemical-resistant suit, butyl rubber gloves; avoid all skin contact
ISOLATION: ERG 151: isolate spill 25m in all directions; if tank/rail car involved in fire, isolate 800m and consider evacuation
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 3436 — Hexafluoroacetone hydrate, solid
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: White to off-white crystalline solid with a pungent, acrid odor. Stable at room temperature when hydrated.
Water Reactivity: Soluble in water, releasing hexafluoroacetone which is highly irritating and toxic
Extinguishing: Dry chemical, CO2, or dry sand; water spray may be used to dilute spills but generates toxic vapors
PPE: Level A or B required; full-face SCBA, chemical-resistant suit, butyl rubber gloves; avoid all skin contact
Isolation: ERG 151: isolate spill 25m in all directions; if tank/rail car involved in fire, isolate 800m and consider evacuation
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— 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.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3436 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3436 Hexafluoroacetone hydrate, solid Cls6 ERG151 | allfirefighter.com/hazmat/un/3436SMS / 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/3436
Advertisement
Frequently Asked Questions about UN 3436
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. 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 Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Containers may explode when heated. Runoff may pollute waterways.
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 or B required; full-face SCBA, chemical-resistant suit, butyl rubber gloves; avoid all skin contact
Water reactivity: Soluble in water, releasing hexafluoroacetone which is highly irritating and toxic. Recommended extinguishing: Dry chemical, CO2, or dry sand; water spray may be used to dilute spills but generates toxic vapors.
ERG Guide 151 recommendation: ERG 151: isolate spill 25m in all directions; if tank/rail car involved in fire, isolate 800m and consider evacuation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.