☣️ UN 3096 • CLASS 8
Corrosive solid, 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 3096
Class: 8
Placard type: Corrosive
ERG: Guide 138 (check current ERG)
Isolation: ERG 138: Initial isolation 50m in all directions. Protect from rain and moisture. For spills isolate 100m. If fire or large spill, isolate 800m downwind during day, 1600m at night. Evacuate immediate area and consult CHEMTREC.
Chemical & Response Details
| Also known as | Water-reactive corrosive solidCorrosive water-reactive substanceDangerous when wet corrosive solidCorrosive solid with water reactivity |
| Appearance | Variable appearance depending on specific substance; typically a solid material that may be crystalline, granular, or powder form. Color and odor vary by specific chemical composition. Corrosive to tissue and reactive with moisture. |
| Flash Point | Not applicable (water-reactive solid) |
| Boiling Point | Not applicable (varies by specific substance) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Reacts with water to produce flammable and/or toxic gases; may ignite spontaneously. Do not use water except in flooding quantities for large fires. May react violently or explosively with moisture. |
| Extinguishing | Dry chemical, dry sand, soda ash, lime. DO NOT use water, foam, or CO2 except in large fires where material cannot be isolated. Use flooding quantities of water from a distance. |
| PPE | ⚠️ Level A or B required depending on release severity. Full body chemical protective clothing, SCBA mandatory. Neoprene or butyl rubber gloves. Face shield and splash goggles. Avoid all contact with water or moisture during response. |
| Isolation | ERG 138: Initial isolation 50m in all directions. Protect from rain and moisture. For spills isolate 100m. If fire or large spill, isolate 800m downwind during day, 1600m at night. Evacuate immediate area and consult CHEMTREC. |
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 3096 — Corrosive solid, water-reactive, n.o.s. HAZMAT RADIO NOTE — UN 3096
Product: Corrosive solid, water-reactive, n.o.s.
Class 8 / Corrosive / ERG 138
PPE: Level A or B required depending on release severity. Full body chemical protective clothing, SCBA mandatory. Neoprene or butyl rubber gloves. Face shield and splash goggles. Avoid all contact with water or moisture during response.
ISOLATION: ERG 138: Initial isolation 50m in all directions. Protect from rain and moisture. For spills isolate 100m. If fire or large spill, isolate 800m downwind during day, 1600m at night. Evacuate immediate area and consult CHEMTREC.
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 3096 — Corrosive solid, water-reactive, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 138
Appearance: Variable appearance depending on specific substance; typically a solid material that may be crystalline, granular, or powder form. Color and odor vary by specific chemical composition. Corrosive to tissue and reactive with moisture.
Water Reactivity: Reacts with water to produce flammable and/or toxic gases; may ignite spontaneously. Do not use water except in flooding quantities for large fires. May react violently or explosively with moisture.
Extinguishing: Dry chemical, dry sand, soda ash, lime. DO NOT use water, foam, or CO2 except in large fires where material cannot be isolated. Use flooding quantities of water from a distance.
PPE: Level A or B required depending on release severity. Full body chemical protective clothing, SCBA mandatory. Neoprene or butyl rubber gloves. Face shield and splash goggles. Avoid all contact with water or moisture during response.
Isolation: ERG 138: Initial isolation 50m in all directions. Protect from rain and moisture. For spills isolate 100m. If fire or large spill, isolate 800m downwind during day, 1600m at night. Evacuate immediate area and consult CHEMTREC.
— 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/3096 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3096 Corrosive solid, water-reactive, n.o.s. Cls8 ERG138 | allfirefighter.com/hazmat/un/3096SMS / 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/3096
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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 A or B required depending on release severity. Full body chemical protective clothing, SCBA mandatory. Neoprene or butyl rubber gloves. Face shield and splash goggles. Avoid all contact with water or moisture during response.
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.