☣️ UN 1489 • CLASS 5
UN 1489 — Potassium perchlorate
Placard: Oxidizer. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 1489 Quick Details
UN 1489
Product name: Potassium perchlorate
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
Common Hazards of UN 1489
- 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
Chemical Identity & Physical Properties
| Also known as | Perchloric acid potassium saltPotassium chlorate (VII)Potassium hyperchlorateKClO4 |
| CAS Number | 7778-74-7 |
| Appearance | White crystalline powder or colorless crystals, odorless. Solid at room temperature with a slightly saline taste. |
| Flash Point | Not applicable (oxidizer, not combustible itself) |
| Boiling Point | Decomposes at 400°C (752°F) before boiling |
| Vapor Density | Not applicable (solid oxidizer) |
| Water Reactivity | Soluble in water without significant exothermic reaction, but contaminated solutions may be reactive |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1489
Extinguishing Media
Water spray for cooling only, dry sand or earth for containment, avoid organic materials and combustibles
PPE Requirements
⚠️ Level B minimum with SCBA; structural firefighter protective clothing provides limited protection in fire situations only
Isolation & Evacuation
ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 1489 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 1489 — Potassium perchlorateHAZMAT RADIO NOTE — UN 1489
Product: Potassium perchlorate
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum with SCBA; structural firefighter protective clothing provides limited protection in fire situations only
ISOLATION: ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in fire, isolate 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 1489 — Potassium perchlorate
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White crystalline powder or colorless crystals, odorless. Solid at room temperature with a slightly saline taste.
Water Reactivity: Soluble in water without significant exothermic reaction, but contaminated solutions may be reactive
Extinguishing: Water spray for cooling only, dry sand or earth for containment, avoid organic materials and combustibles
PPE: Level B minimum with SCBA; structural firefighter protective clothing provides limited protection in fire situations only
Isolation: ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in fire, isolate 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/1489 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1489 Potassium perchlorate Cls5 ERG140 | ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in | allfirefighter.com/hazmat/un/1489SMS / 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/1489
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Frequently Asked Questions about UN 1489
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 with SCBA; structural firefighter protective clothing provides limited protection in fire situations only
Water reactivity: Soluble in water without significant exothermic reaction, but contaminated solutions may be reactive. Recommended extinguishing: Water spray for cooling only, dry sand or earth for containment, avoid organic materials and combustibles.
ERG Guide 140 recommendation: ERG 140: Initial isolation 100m in all directions; if tank/rail car involved in fire, isolate 800m in all directions
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.