☣️ UN 3093 • CLASS 8
Corrosive liquid, oxidizing, n.o.s.
Placard: Corrosive. 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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Quick details
UN 3093
Class: 8
Placard type: Corrosive
ERG: Guide 157 (check current ERG)
Isolation: ERG 157: Isolate spill area immediate vicinity; evacuate 50m in all directions for small spills; large spills isolate 150m and consider evacuation 500m downwind; if tank/rail car involved in fire isolate 800m all directions
Chemical & Response Details
| Also known as | Corrosive oxidizing liquid NOSOxidizing corrosive liquid not otherwise specifiedUN3093 |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to various colors with possible irritating or pungent odor. This is a generic shipping classification covering multiple corrosive and oxidizing liquids not otherwise specified. |
| Flash Point | Not applicable (oxidizing material) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Variable depending on specific substance; typically heavier than air |
| Water Reactivity | May react with water or moist air to release toxic, corrosive or flammable gases; reaction may generate significant heat increasing vapor concentration |
| Extinguishing | Water spray to cool containers; dry chemical or CO2 for small fires; avoid direct water contact with substance due to potential violent reaction |
| PPE | ⚠️ Level B minimum with SCBA required; full face respirator with chemical cartridges inadequate; impervious chemical protective clothing and gloves; avoid all contact with substance and vapors |
| Isolation | ERG 157: Isolate spill area immediate vicinity; evacuate 50m in all directions for small spills; large spills isolate 150m and consider evacuation 500m downwind; if tank/rail car involved in fire isolate 800m all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Reaction with water or moist air may release toxic, corrosive or flammable gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above
- Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
First actions (field-minded)
- 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 3093 — Corrosive liquid, oxidizing, n.o.s. HAZMAT RADIO NOTE — UN 3093
Product: Corrosive liquid, oxidizing, n.o.s.
Class 8 / Corrosive / ERG 157
PPE: Level B minimum with SCBA required; full face respirator with chemical cartridges inadequate; impervious chemical protective clothing and gloves; avoid all contact with substance and vapors
ISOLATION: ERG 157: Isolate spill area immediate vicinity; evacuate 50m in all directions for small spills; large spills isolate 150m and consider evacuation 500m downwind; if tank/rail car involved in fire isolate 800m 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 3093 — Corrosive liquid, oxidizing, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 157
Appearance: Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to various colors with possible irritating or pungent odor. This is a generic shipping classification covering multiple corrosive and oxidizing liquids not otherwise specified.
Water Reactivity: May react with water or moist air to release toxic, corrosive or flammable gases; reaction may generate significant heat increasing vapor concentration
Extinguishing: Water spray to cool containers; dry chemical or CO2 for small fires; avoid direct water contact with substance due to potential violent reaction
PPE: Level B minimum with SCBA required; full face respirator with chemical cartridges inadequate; impervious chemical protective clothing and gloves; avoid all contact with substance and vapors
Isolation: ERG 157: Isolate spill area immediate vicinity; evacuate 50m in all directions for small spills; large spills isolate 150m and consider evacuation 500m downwind; if tank/rail car involved in fire isolate 800m all directions
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Reaction with water or moist air may release toxic, corrosive or flammable 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/3093 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3093 Corrosive liquid, oxidizing, n.o.s. Cls8 ERG157 | allfirefighter.com/hazmat/un/3093SMS / 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/3093
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FAQ
TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance Reaction with water or moist air may release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
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; full face respirator with chemical cartridges inadequate; impervious chemical protective clothing and gloves; avoid all contact with substance and vapors
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 157 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.