☣️ UN 3200 • CLASS 4
UN 3200 — Pyrophoric solid, inorganic, n.o.s.
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 3200 Quick Details
UN 3200
Product name: Pyrophoric solid, inorganic, n.o.s.
DOT Class: 4
Placard type: Spontaneously Combustible
ERG Guide: 135 (check current ERG)
Initial isolation: ERG 135: Initial isolation 100m in all directions; protect from moisture and air exposure during response
Common Hazards of UN 3200
- 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 | Pyrophoric solidSpontaneously combustible inorganic solidSelf-igniting solid inorganic |
| Appearance | Variable appearance depending on specific substance; typically a solid powder or granular material that ignites spontaneously when exposed to air at or below 54°C (130°F). |
| Flash Point | Not applicable (spontaneously combustible in air) |
| Boiling Point | Not applicable (solid, variable by specific substance) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | May react with water or moisture, potentially generating flammable gases or increasing fire intensity |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3200
Extinguishing Media
Dry sand, dry chemical, soda ash; DO NOT use water, foam, or CO2
PPE Requirements
⚠️ Level A or B recommended; SCBA required; full protective clothing due to spontaneous ignition risk
Isolation & Evacuation
ERG 135: Initial isolation 100m in all directions; protect from moisture and air exposure during response
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 135).
First Actions for a UN 3200 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 3200 — Pyrophoric solid, inorganic, n.o.s.HAZMAT RADIO NOTE — UN 3200
Product: Pyrophoric solid, inorganic, n.o.s.
Class 4 / Spontaneously Combustible / ERG 135
PPE: Level A or B recommended; SCBA required; full protective clothing due to spontaneous ignition risk
ISOLATION: ERG 135: Initial isolation 100m in all directions; protect from moisture and air exposure during response
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 3200 — Pyrophoric solid, inorganic, n.o.s.
Class: 4 | Placard: Spontaneously Combustible | ERG Guide: 135
Appearance: Variable appearance depending on specific substance; typically a solid powder or granular material that ignites spontaneously when exposed to air at or below 54°C (130°F).
Water Reactivity: May react with water or moisture, potentially generating flammable gases or increasing fire intensity
Extinguishing: Dry sand, dry chemical, soda ash; DO NOT use water, foam, or CO2
PPE: Level A or B recommended; SCBA required; full protective clothing due to spontaneous ignition risk
Isolation: ERG 135: Initial isolation 100m in all directions; protect from moisture and air exposure during response
— 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/3200 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3200 Pyrophoric solid, inorganic, n.o.s. Cls4 ERG135 | allfirefighter.com/hazmat/un/3200SMS / 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/3200
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Frequently Asked Questions about UN 3200
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 A or B recommended; SCBA required; full protective clothing due to spontaneous ignition risk
Water reactivity: May react with water or moisture, potentially generating flammable gases or increasing fire intensity. Recommended extinguishing: Dry sand, dry chemical, soda ash; DO NOT use water, foam, or CO2.
ERG Guide 135 recommendation: ERG 135: Initial isolation 100m in all directions; protect from moisture and air exposure during response
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.