☣️ UN 1549 • CLASS 6

UN 1549 — Antimony compound, inorganic, solid, n.o.s.

Placard: Toxic. ERG Guide 157. 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 1549 is Antimony compound, inorganic, solid, n.o.s., a toxic antimony material assigned to ERG Guide 157. The exact compound controls water reactivity and solubility, so responders should verify shipping papers and SDS.

Hazard overview: UN 1549 presents antimony dust, ingestion and skin-contact hazards. Some compounds may release corrosive fumes with moisture, while fire or runoff can spread toxic contamination.

Response guidance: For a UN 1549 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 157. Establish incident command, isolate the area, stay upwind, prevent dust or vapor exposure, control runoff and choose entry or cleanup actions based on monitoring, SDS and local SOP.

Firefighter training notes: Training for UN 1549 should emphasize toxic metal compound exposure, dust control, PPE selection, decontamination and runoff containment. Use ERG 157, SDS and local SOP.

Regulatory context: Antimony compound, inorganic, solid, n.o.s. is regulated as a toxic hazardous material. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by compound, concentration, 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: Antimony compound, inorganic, solid, n.o.s. should be stored in tightly closed compatible containers in a secure, cool, dry, well-ventilated toxic-material area away from food, incompatible chemicals, heat and unauthorized access. Prevent dust release, leaks and contaminated runoff.

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UN 1549 Quick Details

UN 1549
Product name: Antimony compound, inorganic, solid, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 157 (check current ERG)
Initial isolation: ERG 157: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 300m downwind if material is leaking

Common Hazards of UN 1549

  • TOXIC antimony compound; inhalation, ingestion or skin contact may cause serious injury.
  • Dust or solution contact may irritate eyes, skin and respiratory tissue.
  • Some inorganic antimony compounds may react with water or moist air to release corrosive fumes or heat.
  • Fire may produce irritating, corrosive and/or toxic gases.
  • Runoff from fire control may carry toxic antimony contamination.
  • Containers may rupture or fail when heated.
  • Specific hazards depend on the exact antimony compound and solubility.

Chemical Identity & Physical Properties

Varies by specific compound; typically white, gray, or colorless crystalline solids or powders. May be odorless or have slight characteristic odor depending on the antimony compound.

Also known asAntimony saltsAntimony compounds inorganicInorganic antimony derivativesAntimony-containing solids
AppearanceVaries by specific compound; typically white, gray, or colorless crystalline solids or powders. May be odorless or have slight characteristic odor depending on the antimony compound.
Flash PointNot applicable (inorganic solid)
Boiling PointVaries by compound; many decompose before boiling
Vapor DensityNot applicable (solid)
Water ReactivitySome antimony compounds react with water or moist air releasing toxic fumes and heat; antimony trichloride reacts violently with water producing hydrochloric acid and heat
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.

Fireground Response Guidance — UN 1549

Extinguishing Media

Use dry chemical, dry sand or dry earth where reactive compounds are possible; water spray may be used only if SDS and incident command confirm compatibility and runoff control.

PPE Requirements

⚠️ Level B minimum recommended; full-face SCBA required; chemical-resistant suit, gloves, and boots to prevent skin contact with toxic dust or solutions

Use positive-pressure SCBA for dust, vapor, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid skin contact and contaminated dust or runoff.

Isolation & Evacuation

ERG 157: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 300m downwind if material is leaking
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 157).

First Actions for a UN 1549 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 or mist and avoid all skin or eye contact.
  • 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 or unknown concentration is present.
  • Use ERG Guide 157, shipping papers, SDS, air monitoring and incident command for protective actions.
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📋 Copy & Share Field Card

UN 1549 — Antimony compound, inorganic, solid, n.o
HAZMAT RADIO NOTE — UN 1549 Product: Antimony compound, inorganic, solid, n.o.s. Class 6 / Toxic / ERG 157 PPE: Level B minimum recommended; full-face SCBA required; chemical-resistant suit, gloves, and boots to prevent skin contact with toxic dust or solutions ISOLATION: ERG 157: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 300m downwind if material is leaking 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 1549 — Antimony compound, inorganic, solid, n.o.s. Class: 6 | Placard: Toxic | ERG Guide: 157 Appearance: Varies by specific compound; typically white, gray, or colorless crystalline solids or powders. May be odorless or have slight characteristic odor depending on the antimony compound. Water Reactivity: Some antimony compounds react with water or moist air releasing toxic fumes and heat; antimony trichloride reacts violently with water producing hydrochloric acid and heat Extinguishing: Use dry chemical, dry sand or dry earth where reactive compounds are possible; water spray may be used only if SDS and incident command confirm compatibility and runoff control. PPE: Level B minimum recommended; full-face SCBA required; chemical-resistant suit, gloves, and boots to prevent skin contact with toxic dust or solutions Isolation: ERG 157: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 300m downwind if material is leaking — Key Hazards — • TOXIC antimony compound; inhalation, ingestion or skin contact may cause serious injury. • Dust or solution contact may irritate eyes, skin and respiratory tissue. • Some inorganic antimony compounds may react with water or moist air to release corrosive fumes or heat. — 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 or mist and avoid all skin or eye contact. SOURCE: allfirefighter.com/hazmat/un/antimony-compound-inorganic-solid-un-1549 | Always use current ERG + SOP/SOGIC BRIEFING

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

SMS (short)
UN1549 Antimony compound, inorganic, solid, n.o.s. Cls6 ERG157 | allfirefighter.com/hazmat/un/antimony-compound-inorganic-solid-un-1549SMS / 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/antimony-compound-inorganic-solid-un-1549

Related UN Numbers in Class 6

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 1549

UN 1549 is Antimony compound, inorganic, solid, n.o.s., a toxic hazardous material assigned to ERG Guide 157.

No. It is generally not flammable, but heating, moisture or fire may create toxic fumes depending on the exact compound.

ERG Guide 157 applies to UN 1549 for initial isolation, protective actions and first response guidance.

UN 1549 presents antimony dust, ingestion and skin-contact hazards. Some compounds may release corrosive fumes with moisture, while fire or runoff can spread toxic contamination.

Use positive-pressure SCBA for dust, vapor, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid skin contact and contaminated dust or runoff.
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.