☣️ UN 2642 • CLASS 6
UN 2642 — Fluoroacetic acid
Placard: Toxic. ERG Guide 154. 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 2642 Quick Details
UN 2642
Product name: Fluoroacetic acid
DOT Class: 6
Placard type: Toxic
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all directions; highly toxic ingestion hazard
Common Hazards of UN 2642
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- 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
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
Chemical Identity & Physical Properties
| Also known as | Monofluoroacetic acidFluoroethanoic acidMFACompound 1080 (related)2-Fluoroacetic acid |
| CAS Number | 144-49-0 |
| Appearance | Colorless to white crystalline solid at room temperature. Odorless or faint acetic acid-like odor. Highly toxic metabolic poison. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | 165C (329F) |
| Vapor Density | Not applicable (solid at ambient temperature) |
| Water Reactivity | Soluble in water; no violent reaction but dissolved material is highly toxic |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2642
Extinguishing Media
Water spray, dry chemical, CO2 suitable for extinguishing; avoid generating dust
PPE Requirements
⚠️ Level A or B required; full encapsulation recommended; SCBA mandatory; prevent all skin contact; chemical-resistant gloves and suits essential
Isolation & Evacuation
ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all directions; highly toxic ingestion hazard
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 2642 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 2642 — Fluoroacetic acidHAZMAT RADIO NOTE — UN 2642
Product: Fluoroacetic acid
Class 6 / Toxic / ERG 154
PPE: Level A or B required; full encapsulation recommended; SCBA mandatory; prevent all skin contact; chemical-resistant gloves and suits essential
ISOLATION: ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all directions; highly toxic ingestion hazard
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 2642 — Fluoroacetic acid
Class: 6 | Placard: Toxic | ERG Guide: 154
Appearance: Colorless to white crystalline solid at room temperature. Odorless or faint acetic acid-like odor. Highly toxic metabolic poison.
Water Reactivity: Soluble in water; no violent reaction but dissolved material is highly toxic
Extinguishing: Water spray, dry chemical, CO2 suitable for extinguishing; avoid generating dust
PPE: Level A or B required; full encapsulation recommended; SCBA mandatory; prevent all skin contact; chemical-resistant gloves and suits essential
Isolation: ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all directions; highly toxic ingestion hazard
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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/2642 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2642 Fluoroacetic acid Cls6 ERG154 | ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all dir | allfirefighter.com/hazmat/un/2642SMS / 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/2642
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Frequently Asked Questions about UN 2642
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury 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 Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Corrosives in contact with metals may evolve flammable hydrogen gas.
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 encapsulation recommended; SCBA mandatory; prevent all skin contact; chemical-resistant gloves and suits essential
Water reactivity: Soluble in water; no violent reaction but dissolved material is highly toxic. Recommended extinguishing: Water spray, dry chemical, CO2 suitable for extinguishing; avoid generating dust.
ERG Guide 154 recommendation: ERG 154: isolate spill 25-50m all directions; initial evacuation 100m in all directions; highly toxic ingestion hazard
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 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.