☣️ UN 1461 • CLASS 5
Chlorates, inorganic, n.o.s.
Placard: Oxidizer. 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 1461
Class: 5
Placard type: Oxidizer
ERG: Guide 140 (check current ERG)
Isolation: ERG 140: initially isolate spill/leak area 50m in all directions; for large spills consider 100m initial isolation; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions
Chemical & Response Details
| Also known as | chloric acid saltsmetal chlorateschlorate oxidizersinorganic chlorate compounds |
| Appearance | Typically white to colorless crystalline solids or powders, odorless. Specific appearance varies by metal cation (sodium, potassium, calcium, etc.). |
| Flash Point | Not applicable (oxidizing solid, not flammable itself) |
| Boiling Point | Not applicable (decomposes upon heating before reaching boiling point) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Generally soluble in water without violent reaction, but solutions are strong oxidizers and may react with organic materials or reducing agents |
| Extinguishing | Water fog or spray for cooling only; do not use on burning material. Dry sand or inert materials for small fires. NO foam, NO carbon dioxide on oxidizer fires. |
| PPE | ⚠️ Level B minimum for spill response; full structural firefighter protective clothing with SCBA for fire situations; avoid all contact with material |
| Isolation | ERG 140: initially isolate spill/leak area 50m in all directions; for large spills consider 100m initial isolation; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- 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.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1461 — Chlorates, inorganic, n.o.s. HAZMAT RADIO NOTE — UN 1461
Product: Chlorates, inorganic, n.o.s.
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum for spill response; full structural firefighter protective clothing with SCBA for fire situations; avoid all contact with material
ISOLATION: ERG 140: initially isolate spill/leak area 50m in all directions; for large spills consider 100m initial isolation; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in 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 1461 — Chlorates, inorganic, n.o.s.
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: Typically white to colorless crystalline solids or powders, odorless. Specific appearance varies by metal cation (sodium, potassium, calcium, etc.).
Water Reactivity: Generally soluble in water without violent reaction, but solutions are strong oxidizers and may react with organic materials or reducing agents
Extinguishing: Water fog or spray for cooling only; do not use on burning material. Dry sand or inert materials for small fires. NO foam, NO carbon dioxide on oxidizer fires.
PPE: Level B minimum for spill response; full structural firefighter protective clothing with SCBA for fire situations; avoid all contact with material
Isolation: ERG 140: initially isolate spill/leak area 50m in all directions; for large spills consider 100m initial isolation; if tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— 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/1461 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1461 Chlorates, inorganic, n.o.s. Cls5 ERG140 | allfirefighter.com/hazmat/un/1461SMS / 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/1461
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FAQ
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. 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. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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 for spill response; full structural firefighter protective clothing with SCBA for fire situations; avoid all contact with material
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.