☣️ UN 2801 • CLASS 8
UN 2801 — Dye intermediate, liquid, corrosive, n.o.s.
Placard: Corrosive. ERG Guide 154. 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 2801 Quick Details
UN 2801
Product name: Dye intermediate, liquid, corrosive, n.o.s.
DOT Class: 8
Placard type: Corrosive
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: Isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Common Hazards of UN 2801
- 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 | Dye intermediate, liquid, corrosive, n.o.s.Corrosive dye intermediateLiquid dye intermediateDyestuff intermediate, corrosive |
| Appearance | Variable liquid (n.o.s. covers multiple substances); typically colored or dark liquid. May have characteristic chemical odor depending on specific intermediate compound. |
| Flash Point | Variable depending on specific dye intermediate; refer to SDS for actual product |
| Boiling Point | Variable depending on specific dye intermediate; refer to SDS for actual product |
| Vapor Density | Variable, typically heavier than air (>1) for most organic intermediates |
| Water Reactivity | May react with water depending on specific intermediate; some dye intermediates hydrolyze or react exothermically |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2801
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2; avoid water streams that may spread corrosive liquid
PPE Requirements
⚠️ Level B minimum with SCBA; full chemical protective suit for spills; butyl or nitrile gloves; face shield and chemical goggles required; material is corrosive and may be toxic
Isolation & Evacuation
ERG 154: Isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 2801 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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UN 2801 — Dye intermediate, liquid, corrosive, n.oHAZMAT RADIO NOTE — UN 2801
Product: Dye intermediate, liquid, corrosive, n.o.s.
Class 8 / Corrosive / ERG 154
PPE: Level B minimum with SCBA; full chemical protective suit for spills; butyl or nitrile gloves; face shield and chemical goggles required; material is corrosive and may be toxic
ISOLATION: ERG 154: Isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
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 2801 — Dye intermediate, liquid, corrosive, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 154
Appearance: Variable liquid (n.o.s. covers multiple substances); typically colored or dark liquid. May have characteristic chemical odor depending on specific intermediate compound.
Water Reactivity: May react with water depending on specific intermediate; some dye intermediates hydrolyze or react exothermically
Extinguishing: Alcohol-resistant foam, dry chemical, CO2; avoid water streams that may spread corrosive liquid
PPE: Level B minimum with SCBA; full chemical protective suit for spills; butyl or nitrile gloves; face shield and chemical goggles required; material is corrosive and may be toxic
Isolation: ERG 154: Isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
— 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/2801 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2801 Dye intermediate, liquid, corrosive, n.o.s. Cls8 ERG154 | allfirefighter.com/hazmat/un/2801SMS / 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/2801
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Frequently Asked Questions about UN 2801
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 SCBA; full chemical protective suit for spills; butyl or nitrile gloves; face shield and chemical goggles required; material is corrosive and may be toxic
Water reactivity: May react with water depending on specific intermediate; some dye intermediates hydrolyze or react exothermically. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2; avoid water streams that may spread corrosive liquid.
ERG Guide 154 recommendation: ERG 154: Isolate spill 25-50m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
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.