☣️ UN 3106 • CLASS 5
Organic peroxide type D, solid
Placard: Organic Peroxide. 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 3106
Class: 5
Placard type: Organic Peroxide
ERG: Guide 145 (check current ERG)
Isolation: ERG 145: Initially isolate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider initial evacuation for 800m in all directions.
Chemical & Response Details
| Also known as | Organic peroxide type D solidClass 5.2 organic peroxideDivision 5.2 peroxide solidSelf-reactive peroxide solid |
| Appearance | Solid material, typically white to off-white powder or granular form. May be odorless or have a characteristic organic odor. Physical appearance varies depending on specific peroxide formulation. |
| Flash Point | Not applicable (self-reactive solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Generally no violent reaction with water, but may decompose or release heat. Avoid contamination with water or moisture which may initiate decomposition. |
| Extinguishing | Dry chemical, CO2, or dry sand preferred. Water spray may be used to cool containers from a distance. Avoid direct application of water to product. |
| PPE | ⚠️ Level B minimum with SCBA required. Full face respirator, chemical-resistant suit, and gloves. Maintain distance due to explosion hazard. Avoid all sources of ignition. |
| Isolation | ERG 145: Initially isolate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider initial evacuation for 800m in all directions. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May explode from heat or contamination.
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- May be ignited by heat, sparks or flames.
- May burn rapidly with flare-burning effect.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Fire may produce irritating, corrosive and/or toxic gases.
- Ingestion or contact (skin, eyes) with substance may cause severe injury or burns.
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.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- Consider initial evacuation for at least 250 meters (800 feet) in all directions.
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UN 3106 — Organic peroxide type D, solid HAZMAT RADIO NOTE — UN 3106
Product: Organic peroxide type D, solid
Class 5 / Organic Peroxide / ERG 145
PPE: Level B minimum with SCBA required. Full face respirator, chemical-resistant suit, and gloves. Maintain distance due to explosion hazard. Avoid all sources of ignition.
ISOLATION: ERG 145: Initially isolate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider initial evacuation for 800m in 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 3106 — Organic peroxide type D, solid
Class: 5 | Placard: Organic Peroxide | ERG Guide: 145
Appearance: Solid material, typically white to off-white powder or granular form. May be odorless or have a characteristic organic odor. Physical appearance varies depending on specific peroxide formulation.
Water Reactivity: Generally no violent reaction with water, but may decompose or release heat. Avoid contamination with water or moisture which may initiate decomposition.
Extinguishing: Dry chemical, CO2, or dry sand preferred. Water spray may be used to cool containers from a distance. Avoid direct application of water to product.
PPE: Level B minimum with SCBA required. Full face respirator, chemical-resistant suit, and gloves. Maintain distance due to explosion hazard. Avoid all sources of ignition.
Isolation: ERG 145: Initially isolate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider initial evacuation for 800m in all directions.
— Key Hazards —
• May explode from heat or contamination.
• May ignite combustibles (wood, paper, oil, clothing, etc.).
• May be ignited by heat, sparks or flames.
— 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 in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3106 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3106 Organic peroxide type D, solid Cls5 ERG145 | allfirefighter.com/hazmat/un/3106SMS / 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/3106
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FAQ
May explode from heat or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect. Containers may explode when heated. Runoff may create fire or explosion hazard. Fire may produce irritating, corrosive and/or toxic gases. Ingestion or contact (skin, eyes) with substance may cause severe injury or burns.
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 B minimum with SCBA required. Full face respirator, chemical-resistant suit, and gloves. Maintain distance due to explosion hazard. Avoid all sources of ignition.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 145 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.