☣️ UN 3405 • CLASS 5
UN 3405 — Barium chlorate, solution
Placard: Oxidizer. ERG Guide 141. 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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UN 3405 Quick Details
UN 3405
Product name: Barium chlorate, solution
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 141 (check current ERG)
Initial isolation: ERG 141: isolate spill 25-50m; if tank/cargo involved in fire, isolate 800m all directions
Common Hazards of UN 3405
- These substances will accelerate burning when involved in a fire.
- May explode from heat or contamination.
- Some may burn rapidly.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Toxic by ingestion.
Chemical Identity & Physical Properties
| Also known as | Barium chlorate solutionChloric acid barium salt solutionBarium chlorate aqueous solution |
| CAS Number | 13477-00-4 |
| Appearance | Clear to slightly cloudy colorless to pale yellow liquid solution with no distinctive odor. Aqueous solution of barium chlorate crystals. |
| Flash Point | Not applicable (aqueous solution, non-flammable solvent) |
| Boiling Point | Approximately 100C (212F), varies with concentration |
| Vapor Density | Not applicable (aqueous solution) |
| Water Reactivity | Already in aqueous solution; dilution with water reduces concentration but maintain oxidizer precautions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3405
Extinguishing Media
Water spray, dry chemical; avoid organic materials and combustibles near oxidizer
PPE Requirements
⚠️ Level B minimum; SCBA, chemical-resistant suit; avoid contact with skin, eyes, and clothing due to oxidizer and toxic barium
Isolation & Evacuation
ERG 141: isolate spill 25-50m; if tank/cargo involved in fire, isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 141).
First Actions for a UN 3405 Incident
- 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
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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📋 Copy & Share Field Card
UN 3405 — Barium chlorate, solutionHAZMAT RADIO NOTE — UN 3405
Product: Barium chlorate, solution
Class 5 / Oxidizer / ERG 141
PPE: Level B minimum; SCBA, chemical-resistant suit; avoid contact with skin, eyes, and clothing due to oxidizer and toxic barium
ISOLATION: ERG 141: isolate spill 25-50m; if tank/cargo involved in fire, isolate 800m all directions
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 3405 — Barium chlorate, solution
Class: 5 | Placard: Oxidizer | ERG Guide: 141
Appearance: Clear to slightly cloudy colorless to pale yellow liquid solution with no distinctive odor. Aqueous solution of barium chlorate crystals.
Water Reactivity: Already in aqueous solution; dilution with water reduces concentration but maintain oxidizer precautions
Extinguishing: Water spray, dry chemical; avoid organic materials and combustibles near oxidizer
PPE: Level B minimum; SCBA, chemical-resistant suit; avoid contact with skin, eyes, and clothing due to oxidizer and toxic barium
Isolation: ERG 141: isolate spill 25-50m; if tank/cargo involved in fire, isolate 800m all directions
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• May explode from heat or contamination.
• Some may burn rapidly.
— 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/3405 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3405 Barium chlorate, solution Cls5 ERG141 | allfirefighter.com/hazmat/un/3405SMS / 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/3405
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Frequently Asked Questions about UN 3405
These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Toxic by ingestion.
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; SCBA, chemical-resistant suit; avoid contact with skin, eyes, and clothing due to oxidizer and toxic barium
Water reactivity: Already in aqueous solution; dilution with water reduces concentration but maintain oxidizer precautions. Recommended extinguishing: Water spray, dry chemical; avoid organic materials and combustibles near oxidizer.
ERG Guide 141 recommendation: ERG 141: isolate spill 25-50m; if tank/cargo involved in fire, isolate 800m all directions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 141 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.