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 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.