☣️ UN 2573 • CLASS 5
UN 2573 — Thallium chlorate
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 2573 Quick Details
UN 2573
Product name: Thallium chlorate
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 141 (check current ERG)
Initial isolation: ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire isolate 800m and consider evacuation for 800m
Common Hazards of UN 2573
- 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 | Thallous chlorateThallium(I) chlorateChloric acid thallium(I) salt |
| CAS Number | 13453-30-0 |
| Appearance | White to colorless crystalline solid, odorless. Moderately soluble in water. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Decomposes at 430C (806F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water with no violent reaction, but may increase oxidizing hazard |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2573
Extinguishing Media
Water spray, dry chemical; avoid organic materials near oxidizer
PPE Requirements
⚠️ Level B minimum; SCBA required; avoid skin contact due to extreme toxicity of thallium compounds
Isolation & Evacuation
ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire isolate 800m and consider evacuation for 800m
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 141).
First Actions for a UN 2573 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 2573 — Thallium chlorateHAZMAT RADIO NOTE — UN 2573
Product: Thallium chlorate
Class 5 / Oxidizer / ERG 141
PPE: Level B minimum; SCBA required; avoid skin contact due to extreme toxicity of thallium compounds
ISOLATION: ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire isolate 800m and consider evacuation for 800m
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 2573 — Thallium chlorate
Class: 5 | Placard: Oxidizer | ERG Guide: 141
Appearance: White to colorless crystalline solid, odorless. Moderately soluble in water.
Water Reactivity: Soluble in water with no violent reaction, but may increase oxidizing hazard
Extinguishing: Water spray, dry chemical; avoid organic materials near oxidizer
PPE: Level B minimum; SCBA required; avoid skin contact due to extreme toxicity of thallium compounds
Isolation: ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire isolate 800m and consider evacuation for 800m
— 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/2573 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2573 Thallium chlorate Cls5 ERG141 | ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire iso | allfirefighter.com/hazmat/un/2573SMS / 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/2573
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Frequently Asked Questions about UN 2573
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 required; avoid skin contact due to extreme toxicity of thallium compounds
Water reactivity: Soluble in water with no violent reaction, but may increase oxidizing hazard. Recommended extinguishing: Water spray, dry chemical; avoid organic materials near oxidizer.
ERG Guide 141 recommendation: ERG 141: isolate spill 50m all directions; if tank/rail car involved in fire isolate 800m and consider evacuation for 800m
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.