☣️ UN 2733 • CLASS 3
UN 2733 — Polyamines, flammable, corrosive, n.o.s.
Placard: Flammable. ERG Guide 132. 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 2733 At a Glance
UN 2733 (Polyamines, flammable, corrosive) is listed as DOT Class 3 Flammable and is assigned to ERG Guide 132. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
Polyamines, flammable, 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 2733 Quick Details
UN 2733
Product name: Polyamines, flammable, corrosive, n.o.s.
DOT Class: 3
Placard type: Flammable
ERG Guide: 132 (check current ERG)
Initial isolation: ERG 132: isolate spill 50m all directions; initial evacuation 100m in all directions if tank/rail car involved
Common Hazards of UN 2733
- 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 or flammable vapors may ignite and flash back.
- Runoff can be corrosive and toxic and may contaminate drains or waterways.
- Containers may rupture when heated in a fire.
Chemical Identity & Physical Properties
Typically clear to amber liquid with a fishy or ammonia-like odor. May be viscous. Corrosive to skin and tissues Exact appearance and viscosity may vary by product.
| Also known as | Aliphatic aminesPolymeric aminesAmine polymersPolyalkylene polyamines |
| Appearance | Typically clear to amber liquid with a fishy or ammonia-like odor. May be viscous. Corrosive to skin and tissues. |
| Flash Point | 23-61C (73-142F) depending on specific polyamine |
| Boiling Point | Above 100C (212F), varies by molecular weight |
| Vapor Density | Greater than 1 (heavier than air) |
| Water Reactivity | May react with water generating heat; some polyamines are water-miscible but exothermic on mixing |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2733
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical; avoid water streams directly on material
PPE Requirements
⚠️ Level B minimum; full face SCBA required; chemical-resistant suit for corrosive vapors and liquid contact
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 132: isolate spill 50m all directions; initial evacuation 100m in all directions if tank/rail car involved
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 132).
First Actions for a UN 2733 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 2733 — Polyamines, flammable, corrosive, n.o.s.HAZMAT RADIO NOTE — UN 2733
Product: Polyamines, flammable, corrosive, n.o.s.
Class 3 / Flammable / ERG 132
PPE: Level B minimum; full face SCBA required; chemical-resistant suit for corrosive vapors and liquid contact
ISOLATION: ERG 132: isolate spill 50m all directions; initial evacuation 100m in all directions if tank/rail car involved
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 2733 — Polyamines, flammable, corrosive, n.o.s.
Class: 3 | Placard: Flammable | ERG Guide: 132
Appearance: Typically clear to amber liquid with a fishy or ammonia-like odor. May be viscous. Corrosive to skin and tissues.
Water Reactivity: May react with water generating heat; some polyamines are water-miscible but exothermic on mixing
Extinguishing: Alcohol-resistant foam, CO2, dry chemical; avoid water streams directly on material
PPE: Level B minimum; full face SCBA required; chemical-resistant suit for corrosive vapors and liquid contact
Isolation: ERG 132: isolate spill 50m all directions; initial evacuation 100m in all directions if tank/rail car involved
— 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-flammable-corrosive-n-un-2733 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN2733 Polyamines, flammable, corrosive, n.o.s. Cls3 ERG132 | allfirefighter.com/hazmat/un/polyamines-flammable-corrosive-n-un-2733SMS / 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-flammable-corrosive-n-un-2733
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Frequently Asked Questions about UN 2733
UN 2733 is Polyamines, flammable, 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.