☣️ UN 1726 • CLASS 8
UN 1726 — Aluminum chloride, anhydrous
Placard: Corrosive. ERG Guide 137. 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.
Aluminum chloride, anhydrous is a highly corrosive and toxic substance that poses significant risks to people and the environment. It is essential to handle this substance with extreme caution and follow proper emergency procedures.
Hazard overview: Aluminum chloride, anhydrous is corrosive and toxic, and can cause severe health effects upon inhalation, ingestion, or contact with vapors, dusts, or the substance itself.
Response guidance: In case of an emergency, evacuate the area immediately and call the local emergency number. Use dry chemical, soda ash, lime, or sand to extinguish fires, and do not use water or foam.
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UN 1726 Quick Details
UN 1726
Product name: Aluminum chloride, anhydrous
DOT Class: 8
Placard type: Corrosive
ERG Guide: 137 (check current ERG)
Initial isolation: ERG 137: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
Common Hazards of UN 1726
- CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Fire will produce irritating, corrosive and/or toxic gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Contact with molten substance may cause severe burns to skin and eyes.
- Runoff from fire control or dilution water may cause environmental contamination.
- EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff.
Chemical Identity & Physical Properties
Aluminum chloride, anhydrous is a white to gray or pale yellow crystalline powder or granular solid with an odorless or pungent odor.
| Also known as | AlCl3Aluminum trichlorideAluminum(III) chloridePAC (polyaluminum chloride when hydrolyzed) |
| CAS Number | 7446-70-0 |
| Appearance | White to gray or pale yellow crystalline powder or granular solid. Odorless when pure, but may emit pungent fumes of hydrogen chloride when exposed to moist air. |
| Flash Point | Not applicable (non-combustible solid) |
| Boiling Point | Sublimes at 180C (356F) under atmospheric pressure |
| Vapor Density | Not applicable (solid, but hydrolyzes to release HCl gas with vapor density 1.3) |
| Water Reactivity | Reacts violently with water, generating heat and corrosive hydrogen chloride gas; do not use water directly on material |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1726
Extinguishing Media
Dry chemical, soda ash, lime, or sand only; do not use water or foam
PPE Requirements
⚠️ Level B minimum with SCBA required; chemical-resistant suit, gloves, and boots; face shield over safety goggles
Wear Level B minimum personal protective equipment (PPE), including a chemical-resistant suit, gloves, and boots, and consider a face shield over safety goggles.
Isolation & Evacuation
ERG 137: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 137).
First Actions for a UN 1726 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 1726 — Aluminum chloride, anhydrousHAZMAT RADIO NOTE — UN 1726
Product: Aluminum chloride, anhydrous
Class 8 / Corrosive / ERG 137
PPE: Level B minimum with SCBA required; chemical-resistant suit, gloves, and boots; face shield over safety goggles
ISOLATION: ERG 137: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
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 1726 — Aluminum chloride, anhydrous
Class: 8 | Placard: Corrosive | ERG Guide: 137
Appearance: White to gray or pale yellow crystalline powder or granular solid. Odorless when pure, but may emit pungent fumes of hydrogen chloride when exposed to moist air.
Water Reactivity: Reacts violently with water, generating heat and corrosive hydrogen chloride gas; do not use water directly on material
Extinguishing: Dry chemical, soda ash, lime, or sand only; do not use water or foam
PPE: Level B minimum with SCBA required; chemical-resistant suit, gloves, and boots; face shield over safety goggles
Isolation: ERG 137: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
— Key Hazards —
• CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Fire will produce irritating, corrosive and/or toxic 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/1726 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1726 Aluminum chloride, anhydrous Cls8 ERG137 | allfirefighter.com/hazmat/un/1726SMS / 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/aluminum-chloride-anhydrous-un-1726
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Frequently Asked Questions about UN 1726
Yes, Aluminum chloride, anhydrous is highly corrosive and can cause severe health effects.
Aluminum chloride, anhydrous reacts violently with water, producing heat and corrosive hydrogen chloride gas.
Wear Level B minimum PPE, including a chemical-resistant suit, gloves, and boots, and consider a face shield over safety goggles.
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.