☣️ UN 3115 • CLASS 5
UN 3115 — Organic peroxide type D, liquid, temperature controlled
Placard: Organic Peroxide. ERG Guide 148. 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 3115 Quick Details
UN 3115
Product name: Organic peroxide type D, liquid, temperature controlled
DOT Class: 5
Placard type: Organic Peroxide
ERG Guide: 148 (check current ERG)
Initial isolation: ERG 148: isolate 100m all directions initially, evacuate 800m all directions if fire or loss of temperature control
Common Hazards of UN 3115
- May explode from heat, contamination or loss of temperature control.
- These materials are particularly sensitive to temperature rises. Above a given "Control Temperature"
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- May ignite spontaneously if exposed to air.
- 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.
Chemical Identity & Physical Properties
| Also known as | Organic peroxide type D liquid TCTemperature controlled organic peroxideSelf-accelerating decomposition temperature peroxideSADT peroxide liquid |
| Appearance | Clear to pale yellow liquid with mild to pungent odor depending on specific peroxide formulation. Oily consistency at controlled temperature. |
| Flash Point | Not applicable (organic peroxide - self-reactive) |
| Boiling Point | Varies by formulation, typically 80-150C (176-302F) before decomposition |
| Vapor Density | 1.0-1.2 (slightly heavier than air) |
| Water Reactivity | Generally no violent reaction with water, but may contaminate and accelerate decomposition |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3115
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2 - use copious water spray for cooling from distance
PPE Requirements
⚠️ Level B minimum with SCBA; heat-resistant protective clothing; maintain temperature control at all times
Isolation & Evacuation
ERG 148: isolate 100m all directions initially, evacuate 800m all directions if fire or loss of temperature control
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 148).
First Actions for a UN 3115 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 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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📋 Copy & Share Field Card
UN 3115 — Organic peroxide type D, liquid, temperaHAZMAT RADIO NOTE — UN 3115
Product: Organic peroxide type D, liquid, temperature controlled
Class 5 / Organic Peroxide / ERG 148
PPE: Level B minimum with SCBA; heat-resistant protective clothing; maintain temperature control at all times
ISOLATION: ERG 148: isolate 100m all directions initially, evacuate 800m all directions if fire or loss of temperature control
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 3115 — Organic peroxide type D, liquid, temperature controlled
Class: 5 | Placard: Organic Peroxide | ERG Guide: 148
Appearance: Clear to pale yellow liquid with mild to pungent odor depending on specific peroxide formulation. Oily consistency at controlled temperature.
Water Reactivity: Generally no violent reaction with water, but may contaminate and accelerate decomposition
Extinguishing: Alcohol-resistant foam, dry chemical, CO2 - use copious water spray for cooling from distance
PPE: Level B minimum with SCBA; heat-resistant protective clothing; maintain temperature control at all times
Isolation: ERG 148: isolate 100m all directions initially, evacuate 800m all directions if fire or loss of temperature control
— Key Hazards —
• May explode from heat, contamination or loss of temperature control.
• These materials are particularly sensitive to temperature rises. Above a given "Control Temperature"
• May ignite combustibles (wood, paper, oil, clothing, etc.).
— 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/3115 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3115 Organic peroxide type D, liquid, temperature controlled Cls5 ERG148 | allfirefighter.com/hazmat/un/3115SMS / 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/3115
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Frequently Asked Questions about UN 3115
May explode from heat, contamination or loss of temperature control. These materials are particularly sensitive to temperature rises. Above a given "Control Temperature" May ignite combustibles (wood, paper, oil, clothing, etc.). May ignite spontaneously if exposed to air. 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.
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; heat-resistant protective clothing; maintain temperature control at all times
Water reactivity: Generally no violent reaction with water, but may contaminate and accelerate decomposition. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2 - use copious water spray for cooling from distance.
ERG Guide 148 recommendation: ERG 148: isolate 100m all directions initially, evacuate 800m all directions if fire or loss of temperature control
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 148 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.