☣️ UN 1458 • CLASS 5
UN 1458 — Chlorate and borate mixture
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.
Chlorate and borate mixture is a highly reactive substance used in various applications. It is essential to handle it with caution and follow proper emergency procedures.
Hazard overview: Chlorate and borate mixture accelerates burning when involved in a fire and may decompose explosively when heated or involved in a fire. It is also a white to off-white crystalline solid or powder mixture.
Response guidance: In case of a fire, use water spray or fog only; avoid foam, dry chemicals, and other extinguishing agents that may react with the oxidizers. For spills, wear Level B minimum personal protective equipment.
Advertisement
UN 1458 Quick Details
UN 1458
Product name: Chlorate and borate mixture
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: isolate spill area 25m in all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 1600m downwind
Common Hazards of UN 1458
- 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
Chlorate and borate mixture is a white to off-white crystalline solid or powder mixture.
| Also known as | Chlorate-borate mixtureBorate and chlorate mixtureMixed oxidizing salt formulation |
| Appearance | White to off-white crystalline solid or powder mixture. Odorless. Stable at room temperature but becomes reactive when heated or contaminated. |
| Flash Point | Not applicable (oxidizing solid mixture) |
| Boiling Point | Not applicable (decomposes at elevated temperatures) |
| Vapor Density | Not applicable (solid mixture) |
| Water Reactivity | Soluble in water; aqueous solutions may be reactive with organic materials and reducing agents |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1458
Extinguishing Media
Water spray or fog only; avoid foam, dry chemicals may react with oxidizers
PPE Requirements
⚠️ Level B minimum for spills; full structural firefighters' protective clothing with SCBA for fire situations
Wear Level B minimum personal protective equipment for spills, and full structural firefighters' protective clothing with a self-contained breathing apparatus (SCBA) for fire situations.
Isolation & Evacuation
ERG 140: isolate spill area 25m in all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 1600m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 1458 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).
Advertisement
📋 Copy & Share Field Card
UN 1458 — Chlorate and borate mixtureHAZMAT RADIO NOTE — UN 1458
Product: Chlorate and borate mixture
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum for spills; full structural firefighters' protective clothing with SCBA for fire situations
ISOLATION: ERG 140: isolate spill area 25m in all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 1600m downwind
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 1458 — Chlorate and borate mixture
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White to off-white crystalline solid or powder mixture. Odorless. Stable at room temperature but becomes reactive when heated or contaminated.
Water Reactivity: Soluble in water; aqueous solutions may be reactive with organic materials and reducing agents
Extinguishing: Water spray or fog only; avoid foam, dry chemicals may react with oxidizers
PPE: Level B minimum for spills; full structural firefighters' protective clothing with SCBA for fire situations
Isolation: ERG 140: isolate spill area 25m in all directions; if tank/cargo involved in fire, isolate 800m and consider evacuation 1600m downwind
— 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/chlorate-and-borate-mixture-un-1458 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1458 Chlorate and borate mixture Cls5 ERG140 | allfirefighter.com/hazmat/un/chlorate-and-borate-mixture-un-1458SMS / 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/chlorate-and-borate-mixture-un-1458
Advertisement
Frequently Asked Questions about UN 1458
No, but it accelerates burning when involved in a fire.
Use water spray or fog only; avoid foam, dry chemicals, and other extinguishing agents that may react with the oxidizers.
No, as they may react with the oxidizers.
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.