☣️ UN 3141 • CLASS 6
Antimony compound, inorganic, liquid, 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 3141
Class: 6
Placard type: Toxic
ERG: Guide 157 (check current ERG)
Isolation: ERG 157: Initial isolation 50m in all directions; protective action distance 0.3 km daytime, 0.5 km nighttime for small spills; isolate fire area and deny entry
Chemical & Response Details
| Also known as | Antimony salts liquidLiquid antimony compoundsAntimony solutions inorganicAntimony chloride solutionsAntimony oxide liquid preparations |
| Appearance | Varies depending on specific antimony compound; typically colorless to pale yellow liquid with little to no odor at room temperature. May appear as viscous solution or aqueous preparation of inorganic antimony salts. |
| Flash Point | Not applicable (inorganic aqueous solution) |
| Boiling Point | Varies by formulation, typically 100-150C (212-302F) for aqueous solutions |
| Vapor Density | Not applicable (non-volatile liquid at ambient temperature) |
| Water Reactivity | May react with water or moist air releasing toxic fumes; reaction can generate heat and increase vapor concentration |
| Extinguishing | Water spray to reduce vapors, dry chemical, CO2; avoid direct water streams that may cause violent reaction |
| PPE | ⚠️ Level B minimum required; SCBA with full facepiece; chemical-resistant suit, gloves and boots; avoid all contact with skin, eyes, and clothing |
| Isolation | ERG 157: Initial isolation 50m in all directions; protective action distance 0.3 km daytime, 0.5 km nighttime for small spills; isolate fire area and deny entry |
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 3141 — Antimony compound, inorganic, liquid, n. HAZMAT RADIO NOTE — UN 3141
Product: Antimony compound, inorganic, liquid, n.o.s.
Class 6 / Toxic / ERG 157
PPE: Level B minimum required; SCBA with full facepiece; chemical-resistant suit, gloves and boots; avoid all contact with skin, eyes, and clothing
ISOLATION: ERG 157: Initial isolation 50m in all directions; protective action distance 0.3 km daytime, 0.5 km nighttime for small spills; isolate fire area and deny entry
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 3141 — Antimony compound, inorganic, liquid, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 157
Appearance: Varies depending on specific antimony compound; typically colorless to pale yellow liquid with little to no odor at room temperature. May appear as viscous solution or aqueous preparation of inorganic antimony salts.
Water Reactivity: May react with water or moist air releasing toxic fumes; reaction can generate heat and increase vapor concentration
Extinguishing: Water spray to reduce vapors, dry chemical, CO2; avoid direct water streams that may cause violent reaction
PPE: Level B minimum required; SCBA with full facepiece; chemical-resistant suit, gloves and boots; avoid all contact with skin, eyes, and clothing
Isolation: ERG 157: Initial isolation 50m in all directions; protective action distance 0.3 km daytime, 0.5 km nighttime for small spills; isolate fire area and deny entry
— 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/3141 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3141 Antimony compound, inorganic, liquid, n.o.s. Cls6 ERG157 | allfirefighter.com/hazmat/un/3141SMS / 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/3141
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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 required; SCBA with full facepiece; chemical-resistant suit, gloves and boots; avoid all contact with skin, eyes, and clothing
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.