☣️ UN 2583 • CLASS 8
UN 2583 — Alkyl sulphonic acids, solid, 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 2583 Quick Details
UN 2583
Product name: Alkyl sulphonic acids, solid, 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 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Common Hazards of UN 2583
- 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 | Alkylsulfonic acidsAlkylsulphonic acids solidSulfonic acid alkyl derivativesAlkyl sulfonic acids with free sulfuric acid |
| Appearance | Solid material, typically white to off-white or yellowish crystalline powder or granules. Contains more than 5% free sulfuric acid, making it highly corrosive. May have a sharp, acidic odor. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with water generating heat and sulfuric acid; can cause violent spattering and corrosive mist formation |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2583
Extinguishing Media
Dry chemical, soda ash, lime; do not use water directly on material
PPE Requirements
⚠️ Level B minimum with full face SCBA; acid-resistant suit, gloves, and boots required; avoid all contact with skin and eyes
Isolation & Evacuation
ERG 153: isolate spill 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).
First Actions for a UN 2583 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 2583 — Alkyl sulphonic acids, solid, with moreHAZMAT RADIO NOTE — UN 2583
Product: Alkyl sulphonic acids, solid, with more than 5% free sulphuric acid
Class 8 / Corrosive / ERG 153
PPE: Level B minimum with full face SCBA; acid-resistant suit, gloves, and boots required; avoid all contact with skin and eyes
ISOLATION: ERG 153: isolate spill 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
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 2583 — Alkyl sulphonic acids, solid, with more than 5% free sulphuric acid
Class: 8 | Placard: Corrosive | ERG Guide: 153
Appearance: Solid material, typically white to off-white or yellowish crystalline powder or granules. Contains more than 5% free sulfuric acid, making it highly corrosive. May have a sharp, acidic odor.
Water Reactivity: Reacts with water generating heat and sulfuric acid; can cause violent spattering and corrosive mist formation
Extinguishing: Dry chemical, soda ash, lime; do not use water directly on material
PPE: Level B minimum with full face SCBA; acid-resistant suit, gloves, and boots required; avoid all contact with skin and eyes
Isolation: ERG 153: isolate spill 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
— 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/2583 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2583 Alkyl sulphonic acids, solid, with more than 5% free sulphuric acid Cls8 ERG153 | allfirefighter.com/hazmat/un/2583SMS / 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/2583
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Frequently Asked Questions about UN 2583
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 B minimum with full face SCBA; acid-resistant suit, gloves, and boots required; avoid all contact with skin and eyes
Water reactivity: Reacts with water generating heat and sulfuric acid; can cause violent spattering and corrosive mist formation. Recommended extinguishing: Dry chemical, soda ash, lime; do not use water directly on material.
ERG Guide 153 recommendation: ERG 153: isolate spill 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
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.