☣️ 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 asChlorate-borate mixtureBorate and chlorate mixtureMixed oxidizing salt formulation
AppearanceWhite to off-white crystalline solid or powder mixture. Odorless. Stable at room temperature but becomes reactive when heated or contaminated.
Flash PointNot applicable (oxidizing solid mixture)
Boiling PointNot applicable (decomposes at elevated temperatures)
Vapor DensityNot applicable (solid mixture)
Water ReactivitySoluble 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 mixture
HAZMAT 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.

SMS WhatsApp
=== 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.

SMS (short)
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

Related UN Numbers in Class 5

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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.