☣️ UN 2871 • CLASS 6
Antimony powder
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 2871
Class: 6
Placard type: Toxic
ERG: Guide 170 (check current ERG)
Isolation: ERG 170: isolate spill area at least 25m in all directions; if fire involved, evacuate 800m radius and fight fire from maximum distance
Chemical & Response Details
| Also known as | Antimony metal powderStibium powderAntimony elementSb powder |
| CAS Number | 7440-36-0 |
| Appearance | Silvery-white to gray lustrous metallic powder. Odorless. Stable at room temperature as a solid powder. |
| Flash Point | Not applicable (combustible metal powder) |
| Boiling Point | 1587C (2889F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | May react with water under certain conditions, particularly when hot or finely divided; generally stable but avoid contact with moisture |
| Extinguishing | Dry chemical, sand, or dry powder extinguisher; do not use water or foam on metal fires |
| PPE | ⚠️ Level C minimum with appropriate respiratory protection; avoid inhalation of dust; chemical-resistant gloves and protective clothing required |
| Isolation | ERG 170: isolate spill area at least 25m in all directions; if fire involved, evacuate 800m radius and fight fire from maximum distance |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May react violently or explosively on contact with water.
- Some are transported in flammable liquids.
- May be ignited by friction, heat, sparks or flames.
- Some of these materials will burn with intense heat.
- Dusts or fumes may form explosive mixtures in air.
- Containers may explode when heated.
- May re-ignite after fire is extinguished.
- Oxides from metallic fires are a severe health hazard.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- Consider initial downwind evacuation for at least 50 meters (160 feet).
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UN 2871 — Antimony powder HAZMAT RADIO NOTE — UN 2871
Product: Antimony powder
Class 6 / Toxic / ERG 170
PPE: Level C minimum with appropriate respiratory protection; avoid inhalation of dust; chemical-resistant gloves and protective clothing required
ISOLATION: ERG 170: isolate spill area at least 25m in all directions; if fire involved, evacuate 800m radius and fight fire from maximum distance
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 2871 — Antimony powder
Class: 6 | Placard: Toxic | ERG Guide: 170
Appearance: Silvery-white to gray lustrous metallic powder. Odorless. Stable at room temperature as a solid powder.
Water Reactivity: May react with water under certain conditions, particularly when hot or finely divided; generally stable but avoid contact with moisture
Extinguishing: Dry chemical, sand, or dry powder extinguisher; do not use water or foam on metal fires
PPE: Level C minimum with appropriate respiratory protection; avoid inhalation of dust; chemical-resistant gloves and protective clothing required
Isolation: ERG 170: isolate spill area at least 25m in all directions; if fire involved, evacuate 800m radius and fight fire from maximum distance
— Key Hazards —
• May react violently or explosively on contact with water.
• Some are transported in flammable liquids.
• May be ignited by friction, heat, sparks or flames.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Stay upwind, uphill and/or upstream.
• Keep unauthorized personnel away.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/2871 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2871 Antimony powder Cls6 ERG170 | ERG 170: isolate spill area at least 25m in all directions; if fire involved, ev | allfirefighter.com/hazmat/un/2871SMS / 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/2871
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FAQ
May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. Oxides from metallic fires are a severe health hazard.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Stay upwind, uphill and/or upstream. Keep unauthorized personnel away.
Level C minimum with appropriate respiratory protection; avoid inhalation of dust; chemical-resistant gloves and protective clothing required
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 170 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.