☣️ UN 1462 • CLASS 5
UN 1462 — Chlorites, inorganic, n.o.s.
Placard: Oxidizer. ERG Guide 143. 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.
Chlorites, inorganic, n.o.s. is a highly reactive substance that can explode from friction, heat or contamination. It is essential to exercise extreme caution when handling this substance.
Hazard overview: May explode from friction, heat or contamination; These substances will accelerate burning when involved in a fire.
Response guidance: In the event of a fire, use dry sand, dry chemical, or CO2 for small fires only. Do not use foam or water on large fires.
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UN 1462 Quick Details
UN 1462
Product name: Chlorites, inorganic, n.o.s.
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 143 (check current ERG)
Initial isolation: ERG 143: isolate 100m in all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
Common Hazards of UN 1462
- May explode from friction, heat or contamination.
- These substances will accelerate burning when involved in a fire.
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Some will react explosively with hydrocarbons (fuels).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe
- Fire may produce irritating and/or toxic gases.
Chemical Identity & Physical Properties
White to pale yellow crystalline solids or powders, typically odorless. Appearance varies depending on specific metal chlorite compound.
| Also known as | Chlorite saltsMetal chloritesChlorous acid saltsInorganic chlorite compounds |
| Appearance | White to pale yellow crystalline solids or powders, typically odorless. Appearance varies depending on specific metal chlorite compound. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Not applicable (decomposes before boiling) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Generally soluble in water; aqueous solutions may be unstable and decompose, releasing oxygen and chlorine dioxide gas |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1462
Extinguishing Media
No foam or water on large fires; use dry sand, dry chemical, or CO2 for small fires only
PPE Requirements
⚠️ Level B minimum with full face SCBA; Level A if confined space or high concentrations suspected; chemical-resistant suit required
Level B minimum with full face SCBA; Level A if confined space or high concentrations suspected; chemical-resistant suit required.
Isolation & Evacuation
ERG 143: isolate 100m in all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 143).
First Actions for a UN 1462 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
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 1462 — Chlorites, inorganic, n.o.s.HAZMAT RADIO NOTE — UN 1462
Product: Chlorites, inorganic, n.o.s.
Class 5 / Oxidizer / ERG 143
PPE: Level B minimum with full face SCBA; Level A if confined space or high concentrations suspected; chemical-resistant suit required
ISOLATION: ERG 143: isolate 100m in all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
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 1462 — Chlorites, inorganic, n.o.s.
Class: 5 | Placard: Oxidizer | ERG Guide: 143
Appearance: White to pale yellow crystalline solids or powders, typically odorless. Appearance varies depending on specific metal chlorite compound.
Water Reactivity: Generally soluble in water; aqueous solutions may be unstable and decompose, releasing oxygen and chlorine dioxide gas
Extinguishing: No foam or water on large fires; use dry sand, dry chemical, or CO2 for small fires only
PPE: Level B minimum with full face SCBA; Level A if confined space or high concentrations suspected; chemical-resistant suit required
Isolation: ERG 143: isolate 100m in all directions; if tank/railcar involved in fire, isolate 800m in all directions and consider evacuation
— Key Hazards —
• May explode from friction, heat or contamination.
• These substances will accelerate burning when involved in a fire.
• May ignite combustibles (wood, paper, oil, clothing, etc.).
— 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/chlorites-inorganic-n-o-un-1462 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1462 Chlorites, inorganic, n.o.s. Cls5 ERG143 | allfirefighter.com/hazmat/un/chlorites-inorganic-n-o-un-1462SMS / 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/chlorites-inorganic-n-o-un-1462
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Frequently Asked Questions about UN 1462
Yes, may explode from friction, heat or contamination.
Level B minimum with full face SCBA; Level A if confined space or high concentrations suspected; chemical-resistant suit required.
Use dry sand, dry chemical, or CO2 for small fires only. Do not use foam or water on large fires.
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.