☣️ UN 1332 • CLASS 4
UN 1332 — Metaldehyde
Placard: Flammable Solid. ERG Guide 133. 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 1332 Quick Details
UN 1332
Product name: Metaldehyde
DOT Class: 4
Placard type: Flammable Solid
ERG Guide: 133 (check current ERG)
Initial isolation: ERG 133: isolate spill/leak area immediately 25-50m all directions; for large fire isolate 800m all directions
Common Hazards of UN 1332
- Flammable/combustible material.
- May be ignited by friction, heat, sparks or flames.
- Some may burn rapidly with flare-burning effect.
- Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence.
- Substance may be transported in a molten form at a temperature that may be above its flash point.
- May re-ignite after fire is extinguished.
- Fire may produce irritating and/or toxic gases.
- Contact may cause burns to skin and eyes.
Chemical Identity & Physical Properties
| Also known as | MetaldehydeMeta fuelSlug baitSnail baitMetacetaldehydeTetraacetaldehyde |
| CAS Number | 108-62-3 |
| Appearance | White crystalline solid or powder with a characteristic odor. Stable at room temperature but may sublime slowly. |
| Flash Point | 36C (97F) |
| Boiling Point | Not applicable (sublimes at 112-115C without melting) |
| Vapor Density | Not applicable (solid, but vapors heavier than air if sublimed) |
| Water Reactivity | Insoluble in water; no significant reaction with water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1332
Extinguishing Media
Dry chemical, CO2, water spray, or regular foam suitable for Class B fires
PPE Requirements
⚠️ Structural firefighters' protective clothing provides limited protection. SCBA recommended for fire or heavy smoke exposure.
Isolation & Evacuation
ERG 133: isolate spill/leak area immediately 25-50m all directions; for large fire isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 133).
First Actions for a UN 1332 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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📋 Copy & Share Field Card
UN 1332 — MetaldehydeHAZMAT RADIO NOTE — UN 1332
Product: Metaldehyde
Class 4 / Flammable Solid / ERG 133
PPE: Structural firefighters' protective clothing provides limited protection. SCBA recommended for fire or heavy smoke exposure.
ISOLATION: ERG 133: isolate spill/leak area immediately 25-50m all directions; for large 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 1332 — Metaldehyde
Class: 4 | Placard: Flammable Solid | ERG Guide: 133
Appearance: White crystalline solid or powder with a characteristic odor. Stable at room temperature but may sublime slowly.
Water Reactivity: Insoluble in water; no significant reaction with water
Extinguishing: Dry chemical, CO2, water spray, or regular foam suitable for Class B fires
PPE: Structural firefighters' protective clothing provides limited protection. SCBA recommended for fire or heavy smoke exposure.
Isolation: ERG 133: isolate spill/leak area immediately 25-50m all directions; for large fire isolate 800m all directions
— Key Hazards —
• Flammable/combustible material.
• May be ignited by friction, heat, sparks or flames.
• Some may burn rapidly with flare-burning effect.
— 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.
• Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/1332 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1332 Metaldehyde Cls4 ERG133 | ERG 133: isolate spill/leak area immediately 25-50m all directions; for large fi | allfirefighter.com/hazmat/un/1332SMS / 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/1332
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Frequently Asked Questions about UN 1332
Flammable/combustible material. May be ignited by friction, heat, sparks or flames. Some may burn rapidly with flare-burning effect. Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. Substance may be transported in a molten form at a temperature that may be above its flash point. May re-ignite after fire is extinguished. Fire may produce irritating and/or toxic gases. Contact may cause burns to skin and eyes.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Structural firefighters' protective clothing provides limited protection. SCBA recommended for fire or heavy smoke exposure.
Water reactivity: Insoluble in water; no significant reaction with water. Recommended extinguishing: Dry chemical, CO2, water spray, or regular foam suitable for Class B fires.
ERG Guide 133 recommendation: ERG 133: isolate spill/leak area immediately 25-50m all directions; for large fire isolate 800m all directions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 133 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.