☣️ UN 1732 • CLASS 8
UN 1732 — Antimony pentafluoride
Placard: Corrosive. ERG Guide 157. 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.
Antimony pentafluoride is a highly toxic and corrosive substance that requires immediate attention. It can cause severe burns and respiratory problems.
Hazard overview: Inhalation, ingestion, or contact with vapors, dusts, or the substance can cause toxic and corrosive effects. Reaction with water or moist air may release toxic, corrosive, or flammable gases.
Response guidance: Isolate the area and evacuate people within 25-50 meters. Use dry chemical, soda ash, or dry sand to extinguish fires.
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UN 1732 Quick Details
UN 1732
Product name: Antimony pentafluoride
DOT Class: 8
Placard type: Corrosive
ERG Guide: 157 (check current ERG)
Initial isolation: ERG 157: isolate spill area 25-50m all directions; evacuate 800m downwind if tank/rail car involved in fire
Common Hazards of UN 1732
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Reaction with water or moist air may release toxic, corrosive or flammable gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Fire will 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
- UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above
- Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
Chemical Identity & Physical Properties
Colorless to pale yellow viscous liquid or oily solid with a pungent, acrid odor.
| Also known as | Antimony(V) fluorideAntimonic fluoridePentafluoroantimony |
| CAS Number | 7783-70-2 |
| Appearance | Colorless to pale yellow viscous liquid or oily solid with a pungent, acrid odor. Fumes strongly in moist air. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 150C (302F) with decomposition |
| Vapor Density | 8.97 (much heavier than air) |
| Water Reactivity | Reacts violently with water releasing toxic and corrosive hydrogen fluoride (HF) fumes; generates significant heat |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1732
Extinguishing Media
Dry chemical, soda ash, or dry sand only; do NOT use water or foam
PPE Requirements
⚠️ Level A recommended for spills; SCBA required; full chemical-resistant suit; neoprene or Viton gloves
Level A recommended for spills; SCBA required; full chemical-resistant suit; neoprene or Viton gloves.
Isolation & Evacuation
ERG 157: isolate spill area 25-50m all directions; evacuate 800m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 157).
First Actions for a UN 1732 Incident
- 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 1732 — Antimony pentafluorideHAZMAT RADIO NOTE — UN 1732
Product: Antimony pentafluoride
Class 8 / Corrosive / ERG 157
PPE: Level A recommended for spills; SCBA required; full chemical-resistant suit; neoprene or Viton gloves
ISOLATION: ERG 157: isolate spill area 25-50m all directions; evacuate 800m downwind if tank/rail car involved in fire
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 1732 — Antimony pentafluoride
Class: 8 | Placard: Corrosive | ERG Guide: 157
Appearance: Colorless to pale yellow viscous liquid or oily solid with a pungent, acrid odor. Fumes strongly in moist air.
Water Reactivity: Reacts violently with water releasing toxic and corrosive hydrogen fluoride (HF) fumes; generates significant heat
Extinguishing: Dry chemical, soda ash, or dry sand only; do NOT use water or foam
PPE: Level A recommended for spills; SCBA required; full chemical-resistant suit; neoprene or Viton gloves
Isolation: ERG 157: isolate spill area 25-50m all directions; evacuate 800m downwind if tank/rail car involved in fire
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Reaction with water or moist air may release toxic, corrosive or flammable gases.
• Reaction with water may generate much heat that will increase the concentration of fumes in the air.
— First Actions —
• 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
SOURCE: allfirefighter.com/hazmat/un/1732 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1732 Antimony pentafluoride Cls8 ERG157 | ERG 157: isolate spill area 25-50m all directions; evacuate 800m downwind if tan | allfirefighter.com/hazmat/un/1732SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/antimony-pentafluoride-un-1732
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Frequently Asked Questions about UN 1732
No
No, do NOT use water or foam
Level A recommended for spills; SCBA required; full chemical-resistant suit; neoprene or Viton gloves
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.