☣️ UN 1549 • CLASS 6
Antimony compound, inorganic, solid, n.o.s.
Placard: Toxic. 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 1549
Class: 6
Placard type: Toxic
ERG: Guide 157 (check current ERG)
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
Chemical & Response Details
| Also known as | Antimony saltsAntimony compounds inorganicInorganic antimony derivativesAntimony-containing solids |
| 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. |
| Flash Point | Not applicable (inorganic solid) |
| Boiling Point | Varies by compound; many decompose before boiling |
| Vapor Density | Not applicable (solid) |
| 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 | Dry chemical, sand, or dry earth; avoid water on reactive compounds |
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Reaction with water or moist air may release toxic, corrosive or flammable gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above
- Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
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 in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- 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 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.
=== 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: Dry chemical, sand, or dry earth; avoid water on reactive compounds
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 and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Reaction with water or moist air may release toxic, corrosive or flammable gases.
• Reaction with water may generate much heat that will increase the concentration of fumes in the 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/1549 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1549 Antimony compound, inorganic, solid, n.o.s. Cls6 ERG157 | allfirefighter.com/hazmat/un/1549SMS / 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/1549
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FAQ
TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance Reaction with water or moist air may release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
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 recommended; full-face SCBA required; chemical-resistant suit, gloves, and boots to prevent skin contact with toxic dust or solutions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 157 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.