☣️ UN 2584 • CLASS 8
UN 2584 — Alkyl sulphonic acids, liquid, with more than 5% free sulphuric acid
Placard: Corrosive. ERG Guide 153. 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.
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UN 2584 Quick Details
UN 2584
Product name: Alkyl sulphonic acids, liquid, with more than 5% free sulphuric acid
DOT Class: 8
Placard type: Corrosive
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill/leak area immediately for at least 25-50m in all directions; evacuate if fire or large spill
Common Hazards of UN 2584
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
- 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
- Combustible material: may burn but does not ignite readily.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
Chemical Identity & Physical Properties
| Also known as | Alkyl sulphonic acids with free sulphuric acidAlkylsulfonic acids liquidSulfonic acid mixtures with H2SO4 |
| Appearance | Corrosive liquid, typically colorless to brown, may have a pungent acidic odor. Consists of organic sulfonic acids mixed with more than 5% free sulfuric acid. |
| Flash Point | Not applicable (non-flammable corrosive liquid) |
| Boiling Point | Varies by composition, typically >150C (302F) |
| Vapor Density | Heavier than air (>1) |
| Water Reactivity | Reacts exothermically with water generating heat; dilute slowly with large amounts of water under controlled conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2584
Extinguishing Media
Water spray to reduce vapors; do not use water jet directly on liquid. Dry chemical, CO2 for adjacent fires.
PPE Requirements
⚠️ Level A or B required; full chemical resistant suit, SCBA mandatory; acid-resistant gloves and boots essential
Isolation & Evacuation
ERG 153: isolate spill/leak area immediately for at least 25-50m in all directions; evacuate if fire or large spill
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).
First Actions for a UN 2584 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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UN 2584 — Alkyl sulphonic acids, liquid, with moreHAZMAT RADIO NOTE — UN 2584
Product: Alkyl sulphonic acids, liquid, with more than 5% free sulphuric acid
Class 8 / Corrosive / ERG 153
PPE: Level A or B required; full chemical resistant suit, SCBA mandatory; acid-resistant gloves and boots essential
ISOLATION: ERG 153: isolate spill/leak area immediately for at least 25-50m in all directions; evacuate if fire or large spill
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 2584 — Alkyl sulphonic acids, liquid, with more than 5% free sulphuric acid
Class: 8 | Placard: Corrosive | ERG Guide: 153
Appearance: Corrosive liquid, typically colorless to brown, may have a pungent acidic odor. Consists of organic sulfonic acids mixed with more than 5% free sulfuric acid.
Water Reactivity: Reacts exothermically with water generating heat; dilute slowly with large amounts of water under controlled conditions
Extinguishing: Water spray to reduce vapors; do not use water jet directly on liquid. Dry chemical, CO2 for adjacent fires.
PPE: Level A or B required; full chemical resistant suit, SCBA mandatory; acid-resistant gloves and boots essential
Isolation: ERG 153: isolate spill/leak area immediately for at least 25-50m in all directions; evacuate if fire or large spill
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
• Contact with molten substance may cause severe burns to skin and eyes.
— 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/2584 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2584 Alkyl sulphonic acids, liquid, with more than 5% free sulphuric acid Cls8 ERG153 | allfirefighter.com/hazmat/un/2584SMS / 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/2584
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Frequently Asked Questions about UN 2584
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears). 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 Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
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 chemical resistant suit, SCBA mandatory; acid-resistant gloves and boots essential
Water reactivity: Reacts exothermically with water generating heat; dilute slowly with large amounts of water under controlled conditions. Recommended extinguishing: Water spray to reduce vapors; do not use water jet directly on liquid. Dry chemical, CO2 for adjacent fires..
ERG Guide 153 recommendation: ERG 153: isolate spill/leak area immediately for at least 25-50m in all directions; evacuate if fire or large spill
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 153 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.