☣️ UN 1052 • CLASS 8
UN 1052 — Hydrogen fluoride, anhydrous
Placard: Corrosive. ERG Guide 125. 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.
Hydrogen fluoride is a toxic and corrosive substance that can be fatal if inhaled, ingested, or absorbed through the skin. It is a highly irritating and corrosive substance that requires careful handling and storage.
Hazard overview: Hydrogen fluoride is a toxic and corrosive substance that can cause severe irritation and damage to the skin, eyes, and respiratory system. Its vapors are extremely irritating and corrosive, making it a highly hazardous substance.
Response guidance: In case of a hydrogen fluoride leak or spill, evacuate the area immediately and use water spray from a safe distance to reduce vapors. Emergency responders should wear Level A PPE, including full-face SCBA and acid-resistant suits, to prevent injury.
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UN 1052 Quick Details
UN 1052
Product name: Hydrogen fluoride, anhydrous
DOT Class: 8
Placard type: Corrosive
ERG Guide: 125 (check current ERG)
Initial isolation: ERG 125: Initial isolation 100m all directions. Protective action distance: small spill 500m downwind daytime, 1.1km nighttime; large spill 1.6km downwind daytime, 4.2km nighttime.
Common Hazards of UN 1052
- TOXIC and/or CORROSIVE; may be fatal if inhaled, ingested or absorbed through skin.
- Vapors are extremely irritating and corrosive.
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may cause environmental contamination.
- Some may burn but none ignite readily.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Some of these materials may react violently with water.
Chemical Identity & Physical Properties
Hydrogen fluoride is a colorless, fuming liquid or gas with a strong, irritating, pungent odor that is extremely corrosive and may appear as white fumes in air due to moisture reaction.
| Also known as | Hydrofluoric acid anhydrousHFFluorohydric acidAnhydrous hydrofluoric acid |
| CAS Number | 7664-39-3 |
| Appearance | Colorless, fuming liquid or gas with a strong, irritating, pungent odor. Extremely corrosive. May appear as white fumes in air due to moisture reaction. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 19.5°C (67°F) |
| Vapor Density | 0.7 (lighter than air) |
| Water Reactivity | Reacts exothermically with water releasing heat and forming corrosive hydrofluoric acid solution. Avoid direct contact with large quantities of water. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1052
Extinguishing Media
Do not use water directly on material. Use water spray to reduce vapors from safe distance. CO2 and dry chemical ineffective on HF itself.
PPE Requirements
⚠️ Level A required for concentrated material. Full-face SCBA, acid-resistant suit with neoprene or butyl rubber protection. Never use leather. Calcium gluconate gel must be immediately available.
Emergency responders should wear Level A PPE, including full-face SCBA and acid-resistant suits, to prevent injury from hydrogen fluoride vapors and corrosive liquid.
Isolation & Evacuation
ERG 125: Initial isolation 100m all directions. Protective action distance: small spill 500m downwind daytime, 1.1km nighttime; large spill 1.6km downwind daytime, 4.2km nighttime.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 125).
First Actions for a UN 1052 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 for at least 100 meters (330 feet) in all directions.
- 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 1052 — Hydrogen fluoride, anhydrousHAZMAT RADIO NOTE — UN 1052
Product: Hydrogen fluoride, anhydrous
Class 8 / Corrosive / ERG 125
PPE: Level A required for concentrated material. Full-face SCBA, acid-resistant suit with neoprene or butyl rubber protection. Never use leather. Calcium gluconate gel must be immediately available.
ISOLATION: ERG 125: Initial isolation 100m all directions. Protective action distance: small spill 500m downwind daytime, 1.1km nighttime; large spill 1.6km downwind daytime, 4.2km nighttime.
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 1052 — Hydrogen fluoride, anhydrous
Class: 8 | Placard: Corrosive | ERG Guide: 125
Appearance: Colorless, fuming liquid or gas with a strong, irritating, pungent odor. Extremely corrosive. May appear as white fumes in air due to moisture reaction.
Water Reactivity: Reacts exothermically with water releasing heat and forming corrosive hydrofluoric acid solution. Avoid direct contact with large quantities of water.
Extinguishing: Do not use water directly on material. Use water spray to reduce vapors from safe distance. CO2 and dry chemical ineffective on HF itself.
PPE: Level A required for concentrated material. Full-face SCBA, acid-resistant suit with neoprene or butyl rubber protection. Never use leather. Calcium gluconate gel must be immediately available.
Isolation: ERG 125: Initial isolation 100m all directions. Protective action distance: small spill 500m downwind daytime, 1.1km nighttime; large spill 1.6km downwind daytime, 4.2km nighttime.
— Key Hazards —
• TOXIC and/or CORROSIVE; may be fatal if inhaled, ingested or absorbed through skin.
• Vapors are extremely irritating and corrosive.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
— 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 for at least 100 meters (330 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/1052 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1052 Hydrogen fluoride, anhydrous Cls8 ERG125 | allfirefighter.com/hazmat/un/1052SMS / 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/hydrogen-fluoride-anhydrous-un-1052
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Frequently Asked Questions about UN 1052
Yes, UN 1052 Hydrogen fluoride is a toxic and corrosive substance that can cause severe irritation and damage to the skin, eyes, and respiratory system.
Evacuate the area immediately and use water spray from a safe distance to reduce vapors, then wear proper PPE to prevent injury from the leak or resulting corrosion.
Level A PPE, including full-face SCBA and acid-resistant suits, is required for emergency response to UN 1052 Hydrogen fluoride.
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.