☣️ UN 3155 • CLASS 6
UN 3155 — Pentachlorophenol
Placard: Toxic. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 3155 Quick Details
UN 3155
Product name: Pentachlorophenol
DOT Class: 6
Placard type: Toxic
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in all directions. If fire or heated, consider evacuation 300m downwind.
Common Hazards of UN 3155
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- Contact with molten substance may cause severe burns to skin and eyes.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
Chemical Identity & Physical Properties
| Also known as | PCPPentaPentachlorophenateChlorophenSantophenDowicide 7Permatox |
| CAS Number | 87-86-5 |
| Appearance | White or tan crystalline solid with a characteristic phenolic odor. May appear as colored flakes or powder depending on purity and formulation. |
| Flash Point | Not applicable (solid, combustible but high ignition temperature) |
| Boiling Point | 310C (590F) with decomposition |
| Vapor Density | Not applicable at room temperature (solid) |
| Water Reactivity | No significant reaction with water, but slightly soluble forming acidic solutions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3155
Extinguishing Media
Dry chemical, CO2, water spray for cooling. Foam can be used for fire control.
PPE Requirements
⚠️ Level B minimum with full face respirator; Level A if molten or high vapor concentration. Nitrile or butyl rubber gloves required; PCP absorbs readily through skin.
Isolation & Evacuation
ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in all directions. If fire or heated, consider evacuation 300m downwind.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 3155 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.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- 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 3155 — PentachlorophenolHAZMAT RADIO NOTE — UN 3155
Product: Pentachlorophenol
Class 6 / Toxic / ERG 154
PPE: Level B minimum with full face respirator; Level A if molten or high vapor concentration. Nitrile or butyl rubber gloves required; PCP absorbs readily through skin.
ISOLATION: ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in all directions. If fire or heated, consider evacuation 300m downwind.
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 3155 — Pentachlorophenol
Class: 6 | Placard: Toxic | ERG Guide: 154
Appearance: White or tan crystalline solid with a characteristic phenolic odor. May appear as colored flakes or powder depending on purity and formulation.
Water Reactivity: No significant reaction with water, but slightly soluble forming acidic solutions
Extinguishing: Dry chemical, CO2, water spray for cooling. Foam can be used for fire control.
PPE: Level B minimum with full face respirator; Level A if molten or high vapor concentration. Nitrile or butyl rubber gloves required; PCP absorbs readily through skin.
Isolation: ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in all directions. If fire or heated, consider evacuation 300m downwind.
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3155 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3155 Pentachlorophenol Cls6 ERG154 | ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in a | allfirefighter.com/hazmat/un/3155SMS / 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/3155
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Frequently Asked Questions about UN 3155
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Corrosives in contact with metals may evolve flammable hydrogen gas.
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 full face respirator; Level A if molten or high vapor concentration. Nitrile or butyl rubber gloves required; PCP absorbs readily through skin.
Water reactivity: No significant reaction with water, but slightly soluble forming acidic solutions. Recommended extinguishing: Dry chemical, CO2, water spray for cooling. Foam can be used for fire control..
ERG Guide 154 recommendation: ERG 154: Isolate spill area immediate vicinity. For large spill isolate 50m in all directions. If fire or heated, consider evacuation 300m downwind.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 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.