☣️ UN 1378 • CLASS 4
Metal catalyst, wetted
Placard: Spontaneously Combustible. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 1378
Class: 4
Placard type: Spontaneously Combustible
ERG: Guide 170 (check current ERG)
Isolation: ERG 170: isolate spill area at least 25m in all directions; if fire or large spill increase isolation distance
Chemical & Response Details
| Also known as | Metal catalyst wettedWetted catalystHydrogenation catalystNickel catalyst wettedRaney nickel wetted |
| Appearance | Gray to black solid metal powder or granules wetted with water or alcohol to suppress pyrophoric properties. May have minimal odor from wetting agent. |
| Flash Point | Not applicable (wetted solid catalyst) |
| Boiling Point | Not applicable (solid metal) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | May react violently or explosively on contact with water if wetting agent evaporates; pyrophoric when dry |
| Extinguishing | Dry chemical, dry sand, or dry limestone; do not use water or foam on dry material |
| PPE | ⚠️ Level B minimum; SCBA required; fire-resistant protective clothing; avoid friction or static discharge |
| Isolation | ERG 170: isolate spill area at least 25m in all directions; if fire or large spill increase isolation distance |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May react violently or explosively on contact with water.
- Some are transported in flammable liquids.
- May be ignited by friction, heat, sparks or flames.
- Some of these materials will burn with intense heat.
- Dusts or fumes may form explosive mixtures in air.
- Containers may explode when heated.
- May re-ignite after fire is extinguished.
- Oxides from metallic fires are a severe health hazard.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- 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 50 meters (160 feet).
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UN 1378 — Metal catalyst, wetted HAZMAT RADIO NOTE — UN 1378
Product: Metal catalyst, wetted
Class 4 / Spontaneously Combustible / ERG 170
PPE: Level B minimum; SCBA required; fire-resistant protective clothing; avoid friction or static discharge
ISOLATION: ERG 170: isolate spill area at least 25m in all directions; if fire or large spill increase isolation distance
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 1378 — Metal catalyst, wetted
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 170
Appearance: Gray to black solid metal powder or granules wetted with water or alcohol to suppress pyrophoric properties. May have minimal odor from wetting agent.
Water Reactivity: May react violently or explosively on contact with water if wetting agent evaporates; pyrophoric when dry
Extinguishing: Dry chemical, dry sand, or dry limestone; do not use water or foam on dry material
PPE: Level B minimum; SCBA required; fire-resistant protective clothing; avoid friction or static discharge
Isolation: ERG 170: isolate spill area at least 25m in all directions; if fire or large spill increase isolation distance
— Key Hazards —
• May react violently or explosively on contact with water.
• Some are transported in flammable liquids.
• May be ignited by friction, heat, sparks or flames.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/1378 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1378 Metal catalyst, wetted Cls4 ERG170 | ERG 170: isolate spill area at least 25m in all directions; if fire or large spi | allfirefighter.com/hazmat/un/1378SMS / 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/1378
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FAQ
May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. Oxides from metallic fires are a severe health hazard.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level B minimum; SCBA required; fire-resistant protective clothing; avoid friction or static discharge
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 170 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.