☣️ UN 3425 • CLASS 8
UN 3425 — Bromoacetic acid, solid
Placard: Corrosive. ERG Guide 156. 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 3425 Quick Details
UN 3425
Product name: Bromoacetic acid, solid
DOT Class: 8
Placard type: Corrosive
ERG Guide: 156 (check current ERG)
Initial isolation: ERG 156: isolate 25-50m all directions; large spill isolate 100m downwind, consider evacuation 300m if involved in fire
Common Hazards of UN 3425
- Combustible material: may burn but does not ignite readily.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapors may travel to source of ignition and flash back.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
Chemical Identity & Physical Properties
| Also known as | Monobromoacetic acidBBAα-Bromoacetic acid2-Bromoacetic acidBromoethanoic acid |
| CAS Number | 79-08-3 |
| Appearance | Colorless to light tan crystalline solid with a pungent, acrid odor. Hygroscopic and corrosive. |
| Flash Point | Not applicable (solid) |
| Boiling Point | 208C (406F) |
| Vapor Density | 4.8 (heavier than air) |
| Water Reactivity | Reacts with water releasing heat and corrosive vapors; may form toxic and flammable gases |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3425
Extinguishing Media
Dry chemical, CO2, sand; use water spray cautiously to cool containers from distance
PPE Requirements
⚠️ Level B minimum; SCBA required; full chemical-resistant suit for large spills or fire involvement
Isolation & Evacuation
ERG 156: isolate 25-50m all directions; large spill isolate 100m downwind, consider evacuation 300m if involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 156).
First Actions for a UN 3425 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 3425 — Bromoacetic acid, solidHAZMAT RADIO NOTE — UN 3425
Product: Bromoacetic acid, solid
Class 8 / Corrosive / ERG 156
PPE: Level B minimum; SCBA required; full chemical-resistant suit for large spills or fire involvement
ISOLATION: ERG 156: isolate 25-50m all directions; large spill isolate 100m downwind, consider evacuation 300m if involved in fire
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 3425 — Bromoacetic acid, solid
Class: 8 | Placard: Corrosive | ERG Guide: 156
Appearance: Colorless to light tan crystalline solid with a pungent, acrid odor. Hygroscopic and corrosive.
Water Reactivity: Reacts with water releasing heat and corrosive vapors; may form toxic and flammable gases
Extinguishing: Dry chemical, CO2, sand; use water spray cautiously to cool containers from distance
PPE: Level B minimum; SCBA required; full chemical-resistant suit for large spills or fire involvement
Isolation: ERG 156: isolate 25-50m all directions; large spill isolate 100m downwind, consider evacuation 300m if involved in fire
— Key Hazards —
• Combustible material: may burn but does not ignite readily.
• Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— 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/3425 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3425 Bromoacetic acid, solid Cls8 ERG156 | allfirefighter.com/hazmat/un/3425SMS / 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/3425
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Frequently Asked Questions about UN 3425
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapors may travel to source of ignition and flash back. Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
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; SCBA required; full chemical-resistant suit for large spills or fire involvement
Water reactivity: Reacts with water releasing heat and corrosive vapors; may form toxic and flammable gases. Recommended extinguishing: Dry chemical, CO2, sand; use water spray cautiously to cool containers from distance.
ERG Guide 156 recommendation: ERG 156: isolate 25-50m all directions; large spill isolate 100m downwind, consider evacuation 300m if involved in fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 156 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.