☣️ UN 3085 • CLASS 5
UN 3085 — Oxidizing solid, corrosive, n.o.s.
Placard: Oxidizer. ERG Guide 140. 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 3085 Quick Details
UN 3085
Product name: Oxidizing solid, corrosive, n.o.s.
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Initial isolation 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
Common Hazards of UN 3085
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
Chemical Identity & Physical Properties
| Also known as | Oxidizing solid corrosive NOSOxidizing corrosive solid not otherwise specifiedUN3085Class 5.1 corrosive oxidizer |
| Appearance | Variable appearance depending on specific chemical; typically a solid powder, granules, or crystals that may be white, colored, or colorless. May have irritating or corrosive odor. This is a shipping classification for multiple chemicals. |
| Flash Point | Not applicable (oxidizing solid, non-flammable but supports combustion) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Variable; some materials may react with water generating heat or corrosive solutions. Consult specific chemical information. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3085
Extinguishing Media
Do not use water or foam on burning material; use dry chemical, sand, or dry earth to smother. Water may intensify fire due to oxidizing properties.
PPE Requirements
⚠️ Level B minimum with SCBA required; chemical-resistant suit due to corrosive nature. Avoid contact with skin, eyes, and clothing. Full face protection essential.
Isolation & Evacuation
ERG 140: Initial isolation 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 3085 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
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 3085 — Oxidizing solid, corrosive, n.o.s.HAZMAT RADIO NOTE — UN 3085
Product: Oxidizing solid, corrosive, n.o.s.
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum with SCBA required; chemical-resistant suit due to corrosive nature. Avoid contact with skin, eyes, and clothing. Full face protection essential.
ISOLATION: ERG 140: Initial isolation 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
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 3085 — Oxidizing solid, corrosive, n.o.s.
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: Variable appearance depending on specific chemical; typically a solid powder, granules, or crystals that may be white, colored, or colorless. May have irritating or corrosive odor. This is a shipping classification for multiple chemicals.
Water Reactivity: Variable; some materials may react with water generating heat or corrosive solutions. Consult specific chemical information.
Extinguishing: Do not use water or foam on burning material; use dry chemical, sand, or dry earth to smother. Water may intensify fire due to oxidizing properties.
PPE: Level B minimum with SCBA required; chemical-resistant suit due to corrosive nature. Avoid contact with skin, eyes, and clothing. Full face protection essential.
Isolation: ERG 140: Initial isolation 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— 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/3085 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3085 Oxidizing solid, corrosive, n.o.s. Cls5 ERG140 | allfirefighter.com/hazmat/un/3085SMS / 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/3085
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Frequently Asked Questions about UN 3085
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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 SCBA required; chemical-resistant suit due to corrosive nature. Avoid contact with skin, eyes, and clothing. Full face protection essential.
Water reactivity: Variable; some materials may react with water generating heat or corrosive solutions. Consult specific chemical information.. Recommended extinguishing: Do not use water or foam on burning material; use dry chemical, sand, or dry earth to smother. Water may intensify fire due to oxidizing properties..
ERG Guide 140 recommendation: ERG 140: Initial isolation 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.