☣️ 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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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
UN 2801 At a Glance
UN 2801 (Dye intermediate, liquid, corrosive) is listed as DOT Class 8 Corrosive and is assigned to ERG Guide 154. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
Dye intermediate, liquid, corrosive, n.o.s. is a broad shipping description for corrosive liquid intermediates used in dye or chemical production. Exact behavior must be verified from the SDS.
Hazard overview: Because this is an n.o.s. entry, responders should not assume one chemistry. The consistent hazard is corrosive liquid exposure; toxicity, flammability and water reactivity vary by formulation.
Response guidance: Isolate the leak, avoid contact and keep colored or corrosive runoff out of drains. Use alcohol-resistant foam, dry chemical or carbon dioxide for fires when compatible with the specific product.
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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
- This n.o.s. entry covers variable corrosive dye intermediates; exact hazards depend on the shipped product.
- Liquid contact can cause severe skin and eye burns.
- Vapors or aerosols may be toxic, irritating or corrosive.
- Some formulations may react with water or generate heat during cleanup.
- Fire may produce toxic nitrogen, sulfur, halogen or aromatic decomposition products depending on composition.
- Runoff may be corrosive, colored and environmentally persistent.
- Product identity must be confirmed from SDS and shipping papers before final tactics.
Chemical Identity & Physical Properties
Appearance may range from clear to dark or strongly colored liquids with product-specific odors. Physical properties such as flash point and vapor density are formulation dependent.
| 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
Use Level B protection with SCBA for spill entry unless monitoring and SDS justify lower protection. Chemical suit, gloves, boots and splash protection are required.
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 and the emergency response number shown on the shipping papers or container documents.
- Keep unauthorized personnel away and establish an isolation perimeter before entry.
- Stay upwind, uphill and upstream; keep responders out of vapors, dusts and runoff.
- Avoid breathing vapors, dust, mist or smoke and avoid skin or eye contact.
- Do not touch damaged containers or spilled material unless properly trained and protected.
- Ventilate confined spaces only when personnel are trained, equipped and monitored.
- Use ERG guidance, SDS, shipping papers and air monitoring to confirm protective actions.
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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 —
• This n.o.s. entry covers variable corrosive dye intermediates; exact hazards depend on the shipped product.
• Liquid contact can cause severe skin and eye burns.
• Vapors or aerosols may be toxic, irritating or corrosive.
— First Actions —
• Call 911 and the emergency response number shown on the shipping papers or container documents.
• Keep unauthorized personnel away and establish an isolation perimeter before entry.
• Stay upwind, uphill and upstream; keep responders out of vapors, dusts and runoff.
• Avoid breathing vapors, dust, mist or smoke and avoid skin or eye contact.
SOURCE: allfirefighter.com/hazmat/un/dye-intermediate-liquid-corrosive-un-2801 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN2801 Dye intermediate, liquid, corrosive, n.o.s. Cls8 ERG154 | allfirefighter.com/hazmat/un/dye-intermediate-liquid-corrosive-un-2801SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/dye-intermediate-liquid-corrosive-un-2801
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Frequently Asked Questions about UN 2801
It is an n.o.s. description, so the exact dye intermediate and formulation control the detailed hazards.
No. Some may burn or have flammable solvents, but the SDS must confirm the flash point.
Corrosive liquid contact is the shared hazard, with possible toxic vapors or decomposition products.
Keep it contained. Dye intermediates may be corrosive, toxic, colored and difficult to remove from waterways.
SCBA with chemical-resistant clothing and splash protection is appropriate until the exact product is confirmed.
Only after confirming the specific substance and neutralization method from the SDS or technical specialist.
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.