☣️ UN 2028 • CLASS 8
UN 2028 — Bombs, smoke, non-explosive, with corrosive liquid, without initiating device
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 2028 Quick Details
UN 2028
Product name: Bombs, smoke, non-explosive, with corrosive liquid, without initiating device
DOT Class: 8
Placard type: Corrosive
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill 25-50m all directions; if fire or large release, isolate 800m and evacuate downwind 1600m
Common Hazards of UN 2028
- 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 | Smoke bombs with corrosive liquidNon-explosive smoke devicesCorrosive smoke munitionsScreening smoke bombs |
| Appearance | Metal or composite canister containing corrosive liquid chemical agent designed to generate smoke when deployed. Not an explosive device. Typically contains irritating or corrosive liquids that vaporize to create screening smoke. |
| Flash Point | Not applicable (non-flammable smoke device) |
| Boiling Point | Varies by specific corrosive agent contained |
| Vapor Density | Heavier than air (corrosive vapors/smoke) |
| Water Reactivity | May react with water depending on specific corrosive agent; avoid water contact |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2028
Extinguishing Media
Do not use water or foam; dry chemical or dry sand for small releases
PPE Requirements
⚠️ Level A or B required; full face SCBA; chemical-resistant suit; smoke/vapor highly toxic and corrosive
Isolation & Evacuation
ERG 153: isolate spill 25-50m all directions; if fire or large release, isolate 800m and evacuate downwind 1600m
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).
First Actions for a UN 2028 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 2028 — Bombs, smoke, non-explosive, with corrosHAZMAT RADIO NOTE — UN 2028
Product: Bombs, smoke, non-explosive, with corrosive liquid, without initiating device
Class 8 / Corrosive / ERG 153
PPE: Level A or B required; full face SCBA; chemical-resistant suit; smoke/vapor highly toxic and corrosive
ISOLATION: ERG 153: isolate spill 25-50m all directions; if fire or large release, isolate 800m and evacuate downwind 1600m
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 2028 — Bombs, smoke, non-explosive, with corrosive liquid, without initiating device
Class: 8 | Placard: Corrosive | ERG Guide: 153
Appearance: Metal or composite canister containing corrosive liquid chemical agent designed to generate smoke when deployed. Not an explosive device. Typically contains irritating or corrosive liquids that vaporize to create screening smoke.
Water Reactivity: May react with water depending on specific corrosive agent; avoid water contact
Extinguishing: Do not use water or foam; dry chemical or dry sand for small releases
PPE: Level A or B required; full face SCBA; chemical-resistant suit; smoke/vapor highly toxic and corrosive
Isolation: ERG 153: isolate spill 25-50m all directions; if fire or large release, isolate 800m and evacuate downwind 1600m
— 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/2028 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2028 Bombs, smoke, non-explosive, with corrosive liquid, without initiating device Cls8 ERG153 | allfirefighter.com/hazmat/un/2028SMS / 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/2028
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Frequently Asked Questions about UN 2028
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 face SCBA; chemical-resistant suit; smoke/vapor highly toxic and corrosive
Water reactivity: May react with water depending on specific corrosive agent; avoid water contact. Recommended extinguishing: Do not use water or foam; dry chemical or dry sand for small releases.
ERG Guide 153 recommendation: ERG 153: isolate spill 25-50m all directions; if fire or large release, isolate 800m and evacuate downwind 1600m
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.