☣️ UN 2735 • CLASS 8
UN 2735 — Polyamines, liquid, corrosive, n.o.s.
Placard: Corrosive. ERG Guide 153. 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 2735 At a Glance
UN 2735 (Polyamines, liquid, corrosive) is listed as DOT Class 8 Corrosive and is assigned to ERG Guide 153. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
Polyamines, liquid, corrosive, n.o.s. is a variable polyamine entry. Treat it as corrosive and verify the exact formulation before selecting PPE or extinguishing tactics.
Hazard overview: Polyamines can cause severe chemical burns and respiratory irritation. Because this is a broad n.o.s. entry, flash point, vapor hazard and water-mixing behavior must be confirmed from the SDS.
Response guidance: Isolate the area, remove ignition sources and keep liquid out of drains. Use alcohol-resistant foam, dry chemical or CO2 for fire control when flammable or combustible liquid is involved; use water spray only for cooling from a safe distance.
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UN 2735 Quick Details
UN 2735
Product name: Polyamines, liquid, corrosive, n.o.s.
DOT Class: 8
Placard type: Corrosive
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill 25-50m all directions; evacuate 100m downwind if tank/rail car involved in fire
Common Hazards of UN 2735
- Broad n.o.s. polyamine entry; exact product composition controls toxicity, flash point and reactivity.
- Corrosive liquid can cause severe skin and eye burns and respiratory irritation.
- Amine vapors may be irritating and heavier than air in some formulations.
- Material may react exothermically with acids and may generate heat when mixed with water.
- Combustible material may burn when heated even if it is not classed as a flammable liquid.
- Runoff can be corrosive and toxic and may contaminate drains or waterways.
- Containers may rupture when heated in a fire.
Chemical Identity & Physical Properties
Viscous liquid, typically colorless to yellow-brown; strong ammonia-like or fishy odor; corrosive to skin and metals Exact appearance and viscosity may vary by product.
| Also known as | polyethylenepolyaminesPEPAaliphatic polyaminesethyleneamine polymerspolyalkylene polyamines |
| Appearance | Viscous liquid, typically colorless to yellow-brown; strong ammonia-like or fishy odor; corrosive to skin and metals. |
| Flash Point | Varies by composition, typically 90-130C (194-266F) for common polyamines |
| Boiling Point | Varies by molecular weight, typically 200-250C (392-482F) with decomposition |
| Vapor Density | Heavier than air (relative density >3.5 for vapors) |
| Water Reactivity | Reacts with water generating heat; may cause splattering or violent boiling if water added to product |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2735
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2; avoid water streams directly on liquid
PPE Requirements
⚠️ Level B minimum; full chemical-resistant suit with SCBA required; neoprene or butyl rubber gloves; face shield and chemical goggles
Use SCBA with chemical-resistant suit, gloves, boots and face protection; upgrade to fully encapsulating protection if vapor or splash risk is high.
Isolation & Evacuation
ERG 153: isolate spill 25-50m all directions; evacuate 100m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).
First Actions for a UN 2735 Incident
- Call 911 and the emergency response number shown on the shipping papers.
- Keep unauthorized personnel away and deny entry to the spill or fire area.
- Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect.
- Avoid breathing dust, vapor, mist or smoke; prevent skin and eye contact.
- Do not touch damaged containers or spilled material without appropriate PPE.
- Ventilate confined spaces only if personnel are trained, equipped and monitored.
- Use the ERG, SDS, shipping papers and air monitoring to set isolation, PPE and tactical decisions.
- For n.o.s. entries, confirm the exact product name, concentration, flash point and corrosivity before committing crews.
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UN 2735 — Polyamines, liquid, corrosive, n.o.s.HAZMAT RADIO NOTE — UN 2735
Product: Polyamines, liquid, corrosive, n.o.s.
Class 8 / Corrosive / ERG 153
PPE: Level B minimum; full chemical-resistant suit with SCBA required; neoprene or butyl rubber gloves; face shield and chemical goggles
ISOLATION: ERG 153: isolate spill 25-50m all directions; evacuate 100m downwind if tank/rail car involved in fire
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 2735 — Polyamines, liquid, corrosive, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 153
Appearance: Viscous liquid, typically colorless to yellow-brown; strong ammonia-like or fishy odor; corrosive to skin and metals.
Water Reactivity: Reacts with water generating heat; may cause splattering or violent boiling if water added to product
Extinguishing: Alcohol-resistant foam, dry chemical, CO2; avoid water streams directly on liquid
PPE: Level B minimum; full chemical-resistant suit with SCBA required; neoprene or butyl rubber gloves; face shield and chemical goggles
Isolation: ERG 153: isolate spill 25-50m all directions; evacuate 100m downwind if tank/rail car involved in fire
— Key Hazards —
• Broad n.o.s. polyamine entry; exact product composition controls toxicity, flash point and reactivity.
• Corrosive liquid can cause severe skin and eye burns and respiratory irritation.
• Amine vapors may be irritating and heavier than air in some formulations.
— First Actions —
• Call 911 and the emergency response number shown on the shipping papers.
• Keep unauthorized personnel away and deny entry to the spill or fire area.
• Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect.
• Avoid breathing dust, vapor, mist or smoke; prevent skin and eye contact.
SOURCE: allfirefighter.com/hazmat/un/polyamines-liquid-corrosive-n-un-2735 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN2735 Polyamines, liquid, corrosive, n.o.s. Cls8 ERG153 | allfirefighter.com/hazmat/un/polyamines-liquid-corrosive-n-un-2735SMS / 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/polyamines-liquid-corrosive-n-un-2735
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Frequently Asked Questions about UN 2735
UN 2735 is Polyamines, liquid, corrosive, n.o.s., regulated as a corrosive polyamine formulation for transport and emergency response.
The main concern is a corrosive polyamine formulation behavior plus exposure risk from dust, vapor, liquid or fire products.
Approach from upwind, isolate the area, keep nonessential people out and verify the exact product with shipping papers or SDS.
Water may create heat or splashing and can spread corrosive runoff; use it only in controlled spray for cooling unless the SDS says otherwise.
Use SCBA with chemical-resistant suit, gloves, boots and face protection; upgrade to fully encapsulating protection if vapor or splash risk is high.
Fire may produce toxic nitrogen oxide smoke and may involve flashback if the formulation is flammable.
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.