☣️ UN 1502 • CLASS 5
UN 1502 — Sodium perchlorate
Placard: Oxidizer. ERG Guide 140. 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.
Sodium perchlorate is a highly reactive substance that can accelerate burning when involved in a fire. It is essential to take immediate action to prevent further damage.
Hazard overview: Sodium perchlorate can decompose explosively when heated or involved in a fire, releasing toxic fumes. It is also highly hygroscopic, making it prone to absorbing moisture from the air.
Response guidance: In the event of a fire, use water spray for cooling and dry chemical or CO2 for small fires. Avoid using combustible materials and organic materials to prevent further ignition.
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UN 1502 Quick Details
UN 1502
Product name: Sodium perchlorate
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Isolate spill area minimum 25m all directions. Fire: isolate 800m all directions. Consider evacuation 800m downwind if tank/rail car involved in fire.
Common Hazards of UN 1502
- 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
Sodium perchlorate is a white crystalline solid or granular powder that is odorless and highly hygroscopic.
| Also known as | Perchloric acid sodium saltSodium perchlorate anhydrousNatrium perchloratePerchlorate de sodium |
| CAS Number | 7601-89-0 |
| Appearance | White crystalline solid or granular powder. Odorless. Highly hygroscopic. Decomposes when heated above 480°C. |
| Flash Point | Not applicable (oxidizer solid) |
| Boiling Point | Not applicable (decomposes at 480°C/896°F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Dissolves readily in water with no significant heat generation. Solution is a strong oxidizer. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1502
Extinguishing Media
Water spray for cooling, dry chemical, CO2 for small fires. DO NOT use combustible materials. Avoid organic materials.
PPE Requirements
⚠️ Level B minimum with SCBA. Full protective clothing and chemical-resistant gloves. Avoid contamination with combustibles.
When handling sodium perchlorate, wear Level B minimum personal protective equipment (PPE) with a self-contained breathing apparatus (SCBA) and full protective clothing and chemical-resistant gloves.
Isolation & Evacuation
ERG 140: Isolate spill area minimum 25m all directions. Fire: isolate 800m all directions. Consider evacuation 800m downwind if tank/rail car involved in fire.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 1502 Incident
- 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 1502 — Sodium perchlorateHAZMAT RADIO NOTE — UN 1502
Product: Sodium perchlorate
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum with SCBA. Full protective clothing and chemical-resistant gloves. Avoid contamination with combustibles.
ISOLATION: ERG 140: Isolate spill area minimum 25m all directions. Fire: isolate 800m all directions. Consider evacuation 800m downwind if tank/rail car involved in fire.
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 1502 — Sodium perchlorate
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White crystalline solid or granular powder. Odorless. Highly hygroscopic. Decomposes when heated above 480°C.
Water Reactivity: Dissolves readily in water with no significant heat generation. Solution is a strong oxidizer.
Extinguishing: Water spray for cooling, dry chemical, CO2 for small fires. DO NOT use combustible materials. Avoid organic materials.
PPE: Level B minimum with SCBA. Full protective clothing and chemical-resistant gloves. Avoid contamination with combustibles.
Isolation: ERG 140: Isolate spill area minimum 25m all directions. Fire: isolate 800m all directions. Consider evacuation 800m downwind if tank/rail car involved in fire.
— 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 —
• 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
SOURCE: allfirefighter.com/hazmat/un/1502 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1502 Sodium perchlorate Cls5 ERG140 | ERG 140: Isolate spill area minimum 25m all directions. Fire: isolate 800m all d | allfirefighter.com/hazmat/un/1502SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/sodium-perchlorate-un-1502
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Frequently Asked Questions about UN 1502
No, UN 1502 is not flammable, but it can accelerate burning when involved in a fire.
No, do not use water to extinguish a fire involving UN 1502, as it can react violently with the substance.
Wear Level B minimum PPE with a SCBA and full protective clothing and chemical-resistant gloves when handling UN 1502.
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.