☣️ UN 2582 • CLASS 8
UN 2582 — Ferric chloride, solution
Placard: Corrosive. 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 2582 Quick Details
UN 2582
Product name: Ferric chloride, solution
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: Isolate spill area at least 25-50m in all directions. Evacuate immediate area if large spill. Keep unauthorized personnel away.
Common Hazards of UN 2582
- 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 | Iron(III) chloride solutionIron trichloride solutionFerric trichloride solutionFlores martis |
| CAS Number | 7705-08-0 |
| Appearance | Yellow to brown corrosive liquid with a faint hydrochloric acid odor. Highly acidic and forms dense corrosive fumes in moist air. |
| Flash Point | Not applicable (non-flammable aqueous solution) |
| Boiling Point | Approximately 105-110C (221-230F) depending on concentration |
| Vapor Density | Not applicable (aqueous solution, heavier than water) |
| Water Reactivity | Miscible with water; dissolution is exothermic and releases heat. May produce acidic fumes. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2582
Extinguishing Media
Water spray, dry chemical, CO2 suitable; avoid direct water stream due to corrosive splashing
PPE Requirements
⚠️ Level B minimum; full chemical-resistant suit, butyl rubber gloves, face shield, and SCBA required. Avoid all skin and eye contact.
Isolation & Evacuation
ERG 154: Isolate spill area at least 25-50m in all directions. Evacuate immediate area if large spill. Keep unauthorized personnel away.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 2582 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 2582 — Ferric chloride, solutionHAZMAT RADIO NOTE — UN 2582
Product: Ferric chloride, solution
Class 8 / Corrosive / ERG 154
PPE: Level B minimum; full chemical-resistant suit, butyl rubber gloves, face shield, and SCBA required. Avoid all skin and eye contact.
ISOLATION: ERG 154: Isolate spill area at least 25-50m in all directions. Evacuate immediate area if large spill. Keep unauthorized personnel away.
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 2582 — Ferric chloride, solution
Class: 8 | Placard: Corrosive | ERG Guide: 154
Appearance: Yellow to brown corrosive liquid with a faint hydrochloric acid odor. Highly acidic and forms dense corrosive fumes in moist air.
Water Reactivity: Miscible with water; dissolution is exothermic and releases heat. May produce acidic fumes.
Extinguishing: Water spray, dry chemical, CO2 suitable; avoid direct water stream due to corrosive splashing
PPE: Level B minimum; full chemical-resistant suit, butyl rubber gloves, face shield, and SCBA required. Avoid all skin and eye contact.
Isolation: ERG 154: Isolate spill area at least 25-50m in all directions. Evacuate immediate area if large spill. Keep unauthorized personnel away.
— 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/2582 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2582 Ferric chloride, solution Cls8 ERG154 | allfirefighter.com/hazmat/un/2582SMS / 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/2582
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Frequently Asked Questions about UN 2582
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 B minimum; full chemical-resistant suit, butyl rubber gloves, face shield, and SCBA required. Avoid all skin and eye contact.
Water reactivity: Miscible with water; dissolution is exothermic and releases heat. May produce acidic fumes.. Recommended extinguishing: Water spray, dry chemical, CO2 suitable; avoid direct water stream due to corrosive splashing.
ERG Guide 154 recommendation: ERG 154: Isolate spill area at least 25-50m in all directions. Evacuate immediate area if large spill. Keep unauthorized personnel away.
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.