☣️ UN 2733 • CLASS 3
Polyamines, flammable, corrosive, n.o.s.
Placard: Flammable. 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 2733
Class: 3
Placard type: Flammable
ERG: Guide 132 (check current ERG)
Isolation: ERG 132: isolate spill 50m all directions; initial evacuation 100m in all directions if tank/rail car involved
Chemical & Response Details
| 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 |
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
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 for at least 50 meters (150 feet) in all directions.
- 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 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 —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
— 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/2733 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2733 Polyamines, flammable, corrosive, n.o.s. Cls3 ERG132 | allfirefighter.com/hazmat/un/2733SMS / 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/2733
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FAQ
Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard.
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; full face SCBA required; chemical-resistant suit for corrosive vapors and liquid contact
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 132 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.