☣️ UN 1783 • CLASS 8

UN 1783 — Hexamethylenediamine, solution

Placard: Corrosive. ERG Guide 153. 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.

UN 1783 is Hexamethylenediamine, solution, a corrosive alkaline amine solution assigned to ERG Guide 153. It can burn eyes, skin and respiratory tissue and may have irritating amine-like vapors.

Hazard overview: UN 1783 presents caustic liquid, amine vapor/mist, heat-on-dilution and alkaline-runoff hazards. Combustibility depends on concentration and formulation.

Response guidance: For a UN 1783 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 153. Establish incident command, isolate the area, stay upwind, prevent incompatible contact, control runoff and choose entry or fire-control actions based on monitoring, SDS and local SOP.

Firefighter training notes: Training for UN 1783 should emphasize corrosive exposure routes, water or oxidizer incompatibility where applicable, air monitoring, PPE selection, decontamination and runoff containment. Use ERG 153, SDS and local SOP.

Regulatory context: Hexamethylenediamine, solution is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by concentration, formulation, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.

Storage & handling: Hexamethylenediamine, solution should be stored in tightly closed compatible containers in a secure, cool, dry, well-ventilated hazardous-material area according to SDS and local procedures.

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UN 1783 Quick Details

UN 1783
Product name: Hexamethylenediamine, solution
DOT Class: 8
Placard type: Corrosive
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill 25-50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation

Common Hazards of UN 1783

  • CORROSIVE alkaline amine solution; skin, eye or respiratory contact may cause severe burns.
  • Vapors or mist may have an amine-like odor and irritate the respiratory tract.
  • Combustibility depends on concentration; concentrated amine solutions may burn under fire conditions.
  • Dilution or mixing may generate heat and spread alkaline runoff.
  • Fire may produce irritating and toxic nitrogen-containing gases.
  • Runoff may be strongly alkaline and harmful to waterways.
  • Containers may rupture or fail when heated.

Chemical Identity & Physical Properties

Clear to slightly yellow aqueous solution with an amine-like, fishy odor. Highly alkaline and corrosive to tissue.

Also known as1,6-Hexanediamine solutionHMDA solutionHexamethylenediamine aqueous solution1,6-Diaminohexane solution
CAS Number124-09-4
AppearanceClear to slightly yellow aqueous solution with an amine-like, fishy odor. Highly alkaline and corrosive to tissue.
Flash PointDepends on concentration; typically 85-100C (185-212F) for concentrated solutions
Boiling PointApproximately 100C (212F) for dilute solutions; 204-205C (399-401F) for pure amine
Vapor DensityNot applicable (aqueous solution, primarily water vapor)
Water ReactivityMiscible with water; exothermic dissolution generates heat when concentrated
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1783

Extinguishing Media

Use extinguishing agents appropriate for the surrounding fire and SDS. Water spray may cool containers or reduce vapors only when runoff can be controlled as corrosive/toxic contamination.

PPE Requirements

⚠️ Level B minimum; SCBA required; full face shield and chemical-resistant gloves mandatory; corrosive to skin and eyes

Use positive-pressure SCBA for vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing selected from SDS for corrosive liquid contact.

Isolation & Evacuation

ERG 153: isolate spill 25-50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).

First Actions for a UN 1783 Incident

  • CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
  • Keep unauthorized personnel away.
  • Stay upwind, uphill and/or upstream.
  • Avoid breathing vapors, fumes, dust, mist or spray and avoid skin or eye contact.
  • Eliminate ignition sources if safe and keep vapors or runoff out of drains, sewers and low areas.
  • Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
  • Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
  • Isolate the spill or leak area and expand the perimeter if vapor, dust, fire involvement, water reaction or unknown concentration is present.
  • Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
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📋 Copy & Share Field Card

UN 1783 — Hexamethylenediamine, solution
HAZMAT RADIO NOTE — UN 1783 Product: Hexamethylenediamine, solution Class 8 / Corrosive / ERG 153 PPE: Level B minimum; SCBA required; full face shield and chemical-resistant gloves mandatory; corrosive to skin and eyes ISOLATION: ERG 153: isolate spill 25-50m all directions; if tank/railcar involved in fire, isolate 800m 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.

SMS WhatsApp
=== IC HAZMAT BRIEFING === UN 1783 — Hexamethylenediamine, solution Class: 8 | Placard: Corrosive | ERG Guide: 153 Appearance: Clear to slightly yellow aqueous solution with an amine-like, fishy odor. Highly alkaline and corrosive to tissue. Water Reactivity: Miscible with water; exothermic dissolution generates heat when concentrated Extinguishing: Use extinguishing agents appropriate for the surrounding fire and SDS. Water spray may cool containers or reduce vapors only when runoff can be controlled as corrosive/toxic contamination. PPE: Level B minimum; SCBA required; full face shield and chemical-resistant gloves mandatory; corrosive to skin and eyes Isolation: ERG 153: isolate spill 25-50m all directions; if tank/railcar involved in fire, isolate 800m and consider evacuation — Key Hazards — • CORROSIVE alkaline amine solution; skin, eye or respiratory contact may cause severe burns. • Vapors or mist may have an amine-like odor and irritate the respiratory tract. • Combustibility depends on concentration; concentrated amine solutions may burn under fire conditions. — First Actions — • CALL 911. Then call the emergency response telephone number on the shipping paper, if available. • Keep unauthorized personnel away. • Stay upwind, uphill and/or upstream. • Avoid breathing vapors, fumes, dust, mist or spray and avoid skin or eye contact. SOURCE: allfirefighter.com/hazmat/un/hexamethylenediamine-solution-un-1783 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)
UN1783 Hexamethylenediamine, solution Cls8 ERG153 | allfirefighter.com/hazmat/un/hexamethylenediamine-solution-un-1783SMS / 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/hexamethylenediamine-solution-un-1783

Related UN Numbers in Class 8

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 1783

UN 1783 is Hexamethylenediamine, solution, a hazardous material assigned to ERG Guide 153.

It depends on concentration. Aqueous solutions may not ignite readily, but concentrated amines can burn under fire conditions.

ERG Guide 153 applies to UN 1783 for initial isolation, protective actions and first response guidance.

UN 1783 presents caustic liquid, amine vapor/mist, heat-on-dilution and alkaline-runoff hazards. Combustibility depends on concentration and formulation.

Use positive-pressure SCBA for vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing selected from SDS for corrosive liquid contact.

Alkaline amine runoff can be corrosive and may contaminate drains, tools and protective clothing.
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.