☣️ UN 1832 • CLASS 8
UN 1832 — Sulphuric acid, spent
Placard: Corrosive. ERG Guide 137. 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 1832 Quick Details
UN 1832
Product name: Sulphuric acid, spent
DOT Class: 8
Placard type: Corrosive
ERG Guide: 137 (check current ERG)
Initial isolation: ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large spill or fire threat; downwind hazard significant
Common Hazards of UN 1832
- 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
| Also known as | spent sulfuric acidwaste sulfuric acidused sulfuric acidcontaminated sulfuric acidspent battery acid |
| Appearance | Dark brown to black oily liquid with a pungent, acrid odor. Contains sulfuric acid contaminated with organic matter, metals, or other impurities from industrial processes. |
| Flash Point | Not applicable (non-flammable liquid) |
| Boiling Point | Approximately 290-338C (554-640F), varies with concentration and contamination |
| Vapor Density | Heavier than air, approximately 3.4 relative to air |
| Water Reactivity | Reacts with water generating significant heat; can cause violent boiling and spattering. Add acid to water slowly, never water to acid. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1832
Extinguishing Media
Do not use water directly; use soda ash or lime to neutralize small spills; CO2 ineffective
PPE Requirements
⚠️ Level B minimum with acid-resistant suit; full face SCBA required; acid-resistant gloves and boots mandatory
Isolation & Evacuation
ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large spill or fire threat; downwind hazard significant
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 137).
First Actions for a UN 1832 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 1832 — Sulphuric acid, spentHAZMAT RADIO NOTE — UN 1832
Product: Sulphuric acid, spent
Class 8 / Corrosive / ERG 137
PPE: Level B minimum with acid-resistant suit; full face SCBA required; acid-resistant gloves and boots mandatory
ISOLATION: ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large spill or fire threat; downwind hazard significant
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 1832 — Sulphuric acid, spent
Class: 8 | Placard: Corrosive | ERG Guide: 137
Appearance: Dark brown to black oily liquid with a pungent, acrid odor. Contains sulfuric acid contaminated with organic matter, metals, or other impurities from industrial processes.
Water Reactivity: Reacts with water generating significant heat; can cause violent boiling and spattering. Add acid to water slowly, never water to acid.
Extinguishing: Do not use water directly; use soda ash or lime to neutralize small spills; CO2 ineffective
PPE: Level B minimum with acid-resistant suit; full face SCBA required; acid-resistant gloves and boots mandatory
Isolation: ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large spill or fire threat; downwind hazard significant
— 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 —
• 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/1832 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1832 Sulphuric acid, spent Cls8 ERG137 | ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large s | allfirefighter.com/hazmat/un/1832SMS / 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/1832
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Frequently Asked Questions about UN 1832
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.
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 acid-resistant suit; full face SCBA required; acid-resistant gloves and boots mandatory
Water reactivity: Reacts with water generating significant heat; can cause violent boiling and spattering. Add acid to water slowly, never water to acid.. Recommended extinguishing: Do not use water directly; use soda ash or lime to neutralize small spills; CO2 ineffective.
ERG Guide 137 recommendation: ERG 137: isolate spill 25-50m all directions; evacuate immediate area if large spill or fire threat; downwind hazard significant
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 137 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.