UN 2465 — Sodium dichloro-s-triazinetrione
Placard: Oxidizer. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2465 At a Glance
UN 2465 (Sodium dichloro-s-triazinetrione) is listed as DOT Class 5 Oxidizer and is assigned to ERG Guide 140. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 2465 is Sodium dichloro-s-triazinetrione, a chlorinated oxidizer assigned to ERG Guide 140. Moisture, acids or organics can release chlorine and intensify fire.
Hazard overview: OXIDIZING chlorinated disinfectant solid; can accelerate burning and intensify fire. Contact with acids, ammonia, organics, oils, fuels or reducing agents may release chlorine or cause violent reaction. Moisture or water can release chlorine-containing gases and heat; wet material may decompose.
Response guidance: For UN 2465, isolate the area, remove combustibles and prevent fuel/organic contamination. Cool containers from protection, use oxidizer-compatible tactics and contain toxic or oxidizing runoff under ERG 140.
Firefighter training notes: Training for UN 2465 should emphasize oxidizer contamination control, incompatible fuels/organics, decomposition signs, container cooling, toxic runoff and decontamination. Use ERG 140, SDS and local SOP.
Regulatory context: Sodium dichloro-s-triazinetrione is regulated as a hazardous material for transport and emergency response. Storage, exposure, spill reporting, waste and fire-code duties depend on quantity, concentration and jurisdiction; verify shipping papers, SDS and local authority requirements.
Storage & handling: Sodium dichloro-s-triazinetrione should be stored in compatible oxidizer-rated containers away from fuels, oils, organics, reducing agents, acids where incompatible and combustible contamination.
UN 2465 Quick Details
Common Hazards of UN 2465
- OXIDIZING chlorinated disinfectant solid; can accelerate burning and intensify fire.
- Contact with acids, ammonia, organics, oils, fuels or reducing agents may release chlorine or cause violent reaction.
- Moisture or water can release chlorine-containing gases and heat; wet material may decompose.
- Dust can irritate or burn eyes, skin and respiratory tissue.
- Fire may produce chlorine, nitrogen oxides and other toxic/corrosive gases.
- Runoff may be oxidizing, corrosive and harmful to waterways.
- Containers may rupture when heated or contaminated.
Chemical Identity & Physical Properties
White crystalline powder or granules with a strong chlorine-like odor. Solid at room temperature.
| 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 |
Fireground Response Guidance — UN 2465
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 2465 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, dust, gas, mist, smoke or fumes and avoid skin or eye contact.
- Keep fuels, oils, organics, reducing agents and combustible contamination away from the oxidizer.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 140, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2465 — Sodium dichloro-s-triazinetrioneUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.