☣️ UN 3094 • CLASS 8
Corrosive liquid, water-reactive, 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 3094
Class: 8
Placard type: Corrosive
ERG: Guide 138 (check current ERG)
Isolation: ERG 138: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions; evacuate area and deny entry
Chemical & Response Details
| Also known as | Corrosive liquid water-reactive NOSWater-reactive corrosive liquid not otherwise specifiedClass 8 water-reactive liquid |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature that reacts with water or moisture. May be colorless to colored with varying odors depending on the specific chemical. |
| Flash Point | Variable - depends on specific substance; many produce flammable gases on contact with water |
| Boiling Point | Variable - depends on specific substance in this n.o.s. classification |
| Vapor Density | Variable - typically heavier than air for most corrosive liquids in this category |
| Water Reactivity | Reacts with water producing flammable gases; may ignite spontaneously on contact with water or moist air; some react vigorously or explosively with water |
| Extinguishing | Do not use water or water-based agents; use dry chemical, soda ash, lime, or sand to absorb and contain |
| PPE | ⚠️ Level B minimum with SCBA required; full chemical-resistant suit necessary due to corrosive nature; avoid all contact with moisture |
| Isolation | ERG 138: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions; evacuate area and deny entry |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Produce flammable gases on contact with water.
- May ignite on contact with water or moist air.
- Some react vigorously or explosively on contact with water.
- May be ignited by heat, sparks or flames.
- May re-ignite after fire is extinguished.
- Some are transported in highly flammable liquids.
- Runoff may create fire or explosion hazard.
- Inhalation or contact with vapors, substance or decomposition products may cause severe injury or
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
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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UN 3094 — Corrosive liquid, water-reactive, n.o.s. HAZMAT RADIO NOTE — UN 3094
Product: Corrosive liquid, water-reactive, n.o.s.
Class 8 / Corrosive / ERG 138
PPE: Level B minimum with SCBA required; full chemical-resistant suit necessary due to corrosive nature; avoid all contact with moisture
ISOLATION: ERG 138: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions; evacuate area and deny entry
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 3094 — Corrosive liquid, water-reactive, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 138
Appearance: Variable appearance depending on specific substance; typically a liquid at room temperature that reacts with water or moisture. May be colorless to colored with varying odors depending on the specific chemical.
Water Reactivity: Reacts with water producing flammable gases; may ignite spontaneously on contact with water or moist air; some react vigorously or explosively with water
Extinguishing: Do not use water or water-based agents; use dry chemical, soda ash, lime, or sand to absorb and contain
PPE: Level B minimum with SCBA required; full chemical-resistant suit necessary due to corrosive nature; avoid all contact with moisture
Isolation: ERG 138: Initial isolation 50m in all directions; if tank/rail car involved in fire, isolate 800m in all directions; evacuate area and deny entry
— Key Hazards —
• Produce flammable gases on contact with water.
• May ignite on contact with water or moist air.
• Some react vigorously or explosively on contact with water.
— 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/3094 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3094 Corrosive liquid, water-reactive, n.o.s. Cls8 ERG138 | allfirefighter.com/hazmat/un/3094SMS / 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/3094
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FAQ
Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard. Inhalation or contact with vapors, substance or decomposition products may cause severe injury 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; full chemical-resistant suit necessary due to corrosive nature; avoid all contact with moisture
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 138 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.