☣️ UN 1932 • CLASS 4
UN 1932 — Zirconium scrap
Placard: Spontaneously Combustible. ERG Guide 135. 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 1932 Quick Details
UN 1932
Product name: Zirconium scrap
DOT Class: 4
Placard type: Spontaneously Combustible
ERG Guide: 135 (check current ERG)
Initial isolation: ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, evacuate 800m downwind if fire
Common Hazards of UN 1932
- Flammable/combustible material.
- May ignite on contact with moist air or moisture.
- May burn rapidly with flare-burning effect.
- Some react vigorously or explosively on contact with water.
- Some may decompose explosively when heated or involved in a fire.
- May re-ignite after fire is extinguished.
- Runoff may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Zirconium metal scrapZirconium turningsZirconium shavingsZirconium waste |
| CAS Number | 7440-67-7 |
| Appearance | Silvery-gray to black metallic solid in the form of scrap pieces, turnings, or shavings. Odorless. |
| Flash Point | Not applicable (pyrophoric solid) |
| Boiling Point | 4377C (7911F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with moisture producing hydrogen gas; may ignite spontaneously |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1932
Extinguishing Media
Dry sand, dry chemical, soda ash; no water or foam
PPE Requirements
⚠️ Level B minimum; SCBA required; fire-resistant protective clothing
Isolation & Evacuation
ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, evacuate 800m downwind if fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 135).
First Actions for a UN 1932 Incident
- 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
- 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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📋 Copy & Share Field Card
UN 1932 — Zirconium scrapHAZMAT RADIO NOTE — UN 1932
Product: Zirconium scrap
Class 4 / Spontaneously Combustible / ERG 135
PPE: Level B minimum; SCBA required; fire-resistant protective clothing
ISOLATION: ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, evacuate 800m downwind if fire
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 1932 — Zirconium scrap
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 135
Appearance: Silvery-gray to black metallic solid in the form of scrap pieces, turnings, or shavings. Odorless.
Water Reactivity: Reacts with moisture producing hydrogen gas; may ignite spontaneously
Extinguishing: Dry sand, dry chemical, soda ash; no water or foam
PPE: Level B minimum; SCBA required; fire-resistant protective clothing
Isolation: ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, evacuate 800m downwind if fire
— Key Hazards —
• Flammable/combustible material.
• May ignite on contact with moist air or moisture.
• May burn rapidly with flare-burning effect.
— 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/1932 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1932 Zirconium scrap Cls4 ERG135 | ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, | allfirefighter.com/hazmat/un/1932SMS / 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/1932
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Frequently Asked Questions about UN 1932
Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
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
Water reactivity: Reacts with moisture producing hydrogen gas; may ignite spontaneously. Recommended extinguishing: Dry sand, dry chemical, soda ash; no water or foam.
ERG Guide 135 recommendation: ERG 135: isolate 25m all directions; for large spill isolate 50m all directions, evacuate 800m downwind if fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 135 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.