☣️ UN 2026 • CLASS 6
Phenylmercuric compound, n.o.s.
Placard: Toxic. 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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Quick details
UN 2026
Class: 6
Placard type: Toxic
ERG: Guide 151 (check current ERG)
Isolation: ERG 151: isolate spill/leak 25m all directions; if tank/rail car involved in fire isolate 800m all directions and consider evacuation for 800m in all directions
Chemical & Response Details
| Also known as | Phenylmercury compoundsOrganomercury compoundsPhenylmercuric saltsMercury phenyl derivatives |
| Appearance | Varies by specific compound; typically white to off-white crystalline powder or solid. May be odorless or have slight characteristic odor. Solid at room temperature. |
| Flash Point | Not applicable (solid, non-flammable) |
| Boiling Point | Varies by compound; typically decomposes before boiling at elevated temperatures |
| Vapor Density | Not applicable (solid with negligible vapor pressure at room temperature) |
| Water Reactivity | No significant reaction with water; slightly soluble to insoluble depending on compound |
| Extinguishing | Dry chemical, CO2, water spray for cooling; foam generally acceptable for fire control |
| PPE | ⚠️ Level B minimum; SCBA and full chemical-resistant suit required; avoid all skin contact due to severe dermal absorption hazard |
| Isolation | ERG 151: isolate spill/leak 25m all directions; if tank/rail car involved in fire isolate 800m all directions and consider 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)
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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
- Containers may explode when heated.
- Runoff may pollute waterways.
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
- 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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UN 2026 — Phenylmercuric compound, n.o.s. HAZMAT RADIO NOTE — UN 2026
Product: Phenylmercuric compound, n.o.s.
Class 6 / Toxic / ERG 151
PPE: Level B minimum; SCBA and full chemical-resistant suit required; avoid all skin contact due to severe dermal absorption hazard
ISOLATION: ERG 151: isolate spill/leak 25m all directions; if tank/rail car involved in fire isolate 800m all directions and consider 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 2026 — Phenylmercuric compound, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Varies by specific compound; typically white to off-white crystalline powder or solid. May be odorless or have slight characteristic odor. Solid at room temperature.
Water Reactivity: No significant reaction with water; slightly soluble to insoluble depending on compound
Extinguishing: Dry chemical, CO2, water spray for cooling; foam generally acceptable for fire control
PPE: Level B minimum; SCBA and full chemical-resistant suit required; avoid all skin contact due to severe dermal absorption hazard
Isolation: ERG 151: isolate spill/leak 25m all directions; if tank/rail car involved in fire isolate 800m all directions and consider evacuation for 800m in all directions
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— 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/2026 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2026 Phenylmercuric compound, n.o.s. Cls6 ERG151 | allfirefighter.com/hazmat/un/2026SMS / 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/2026
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FAQ
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. 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 Containers may explode when heated. Runoff may pollute waterways.
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; SCBA and full chemical-resistant suit required; avoid all skin contact due to severe dermal absorption hazard
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.