☣️ UN 2927 • CLASS 6
Poisonous liquid, corrosive, organic, n.o.s.
Placard: Toxic. 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 2927
Class: 6
Placard type: Toxic
ERG: Guide 154 (check current ERG)
Isolation: ERG 154: Initial isolation 50m all directions; protect persons downwind; increase distances for large spills or fire; evacuate spill area
Chemical & Response Details
| Also known as | Toxic corrosive liquid organic N.O.S.Poisonous corrosive organic liquid N.O.S.Organic toxic corrosive liquid N.O.S. |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to colored with various odors depending on specific chemical composition. |
| Flash Point | Variable depending on specific substance - refer to SDS for actual chemical |
| Boiling Point | Variable depending on specific substance - refer to SDS for actual chemical |
| Vapor Density | Variable depending on specific substance - typically heavier than air |
| Water Reactivity | Variable - some may react with water; avoid contact until specific chemical identified |
| Extinguishing | Use alcohol-resistant foam if available; dry chemical, CO2 for small fires; avoid direct water streams |
| PPE | ⚠️ Level A or B recommended; SCBA required; chemical-resistant suit mandatory; avoid all skin contact due to corrosive and toxic nature |
| Isolation | ERG 154: Initial isolation 50m all directions; protect persons downwind; increase distances for large spills or fire; evacuate spill area |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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.
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.
- 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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UN 2927 — Poisonous liquid, corrosive, organic, n. HAZMAT RADIO NOTE — UN 2927
Product: Poisonous liquid, corrosive, organic, n.o.s.
Class 6 / Toxic / ERG 154
PPE: Level A or B recommended; SCBA required; chemical-resistant suit mandatory; avoid all skin contact due to corrosive and toxic nature
ISOLATION: ERG 154: Initial isolation 50m all directions; protect persons downwind; increase distances for large spills or fire; evacuate spill area
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 2927 — Poisonous liquid, corrosive, organic, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 154
Appearance: Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to colored with various odors depending on specific chemical composition.
Water Reactivity: Variable - some may react with water; avoid contact until specific chemical identified
Extinguishing: Use alcohol-resistant foam if available; dry chemical, CO2 for small fires; avoid direct water streams
PPE: Level A or B recommended; SCBA required; chemical-resistant suit mandatory; avoid all skin contact due to corrosive and toxic nature
Isolation: ERG 154: Initial isolation 50m all directions; protect persons downwind; increase distances for large spills or fire; evacuate spill area
— 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/2927 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2927 Poisonous liquid, corrosive, organic, n.o.s. Cls6 ERG154 | allfirefighter.com/hazmat/un/2927SMS / 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/2927
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FAQ
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 A or B recommended; SCBA required; chemical-resistant suit mandatory; avoid all skin contact due to corrosive and toxic nature
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.