☣️ UN 2465 • CLASS 5
UN 2465 — Sodium dichloro-s-triazinetrione
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.
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UN 2465 Quick Details
UN 2465
Product name: Sodium dichloro-s-triazinetrione
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: isolate spill area 25m in all directions; if fire involved, isolate 800m and evacuate downwind
Common Hazards of UN 2465
- 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 | Dichloroisocyanuric acid sodium saltNaDCCSodium dichloroisocyanurateTroclosene sodium |
| CAS Number | 2893-78-9 |
| Appearance | White crystalline powder or granules with a strong chlorine-like odor. Solid at room temperature. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Not applicable (decomposes at approximately 240C/464F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with water releasing chlorine gas and heat; dissolution generates hypochlorous acid |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2465
Extinguishing Media
Dry chemical, sand, or dry powder only; avoid water-based agents due to oxidizer properties
PPE Requirements
⚠️ Level B minimum; SCBA required; chemical-resistant suit; avoid contamination with organics or acids
Isolation & Evacuation
ERG 140: isolate spill area 25m in all directions; if fire involved, isolate 800m and evacuate downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 2465 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 2465 — Sodium dichloro-s-triazinetrioneHAZMAT RADIO NOTE — UN 2465
Product: Sodium dichloro-s-triazinetrione
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum; SCBA required; chemical-resistant suit; avoid contamination with organics or acids
ISOLATION: ERG 140: isolate spill area 25m in all directions; if fire involved, isolate 800m and evacuate 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 2465 — Sodium dichloro-s-triazinetrione
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White crystalline powder or granules with a strong chlorine-like odor. Solid at room temperature.
Water Reactivity: Reacts with water releasing chlorine gas and heat; dissolution generates hypochlorous acid
Extinguishing: Dry chemical, sand, or dry powder only; avoid water-based agents due to oxidizer properties
PPE: Level B minimum; SCBA required; chemical-resistant suit; avoid contamination with organics or acids
Isolation: ERG 140: isolate spill area 25m in all directions; if fire involved, isolate 800m and evacuate 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 —
• 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/2465 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2465 Sodium dichloro-s-triazinetrione Cls5 ERG140 | allfirefighter.com/hazmat/un/2465SMS / 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/2465
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Frequently Asked Questions about UN 2465
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; SCBA required; chemical-resistant suit; avoid contamination with organics or acids
Water reactivity: Reacts with water releasing chlorine gas and heat; dissolution generates hypochlorous acid. Recommended extinguishing: Dry chemical, sand, or dry powder only; avoid water-based agents due to oxidizer properties.
ERG Guide 140 recommendation: ERG 140: isolate spill area 25m in all directions; if fire involved, isolate 800m and evacuate downwind
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.