UN 2984 — Hydrogen peroxide, aqueous solution, with not less than 8% but less than 20% hydrogen peroxide
Placard: Oxidizer. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2984 At a Glance
UN 2984 (Hydrogen peroxide, aqueous solution, with not less than 8% but less…) 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 2984 is Hydrogen peroxide, aqueous solution, with not less than 8% but less than 20% hydrogen peroxide, an oxidizing aqueous peroxide solution assigned to ERG Guide 140. Contamination and oxygen release drive response.
Hazard overview: OXIDIZING hydrogen peroxide solution; can intensify fire involving combustibles. Concentration is below strong-peroxide entries but contamination can still accelerate decomposition. Contact with organics, metals, dirt, reducing agents or incompatible containers may release oxygen and heat.
Response guidance: For UN 2984, isolate the area, remove combustibles and prevent contamination with metals, organics or reducing agents. Cool containers and contain oxidizing runoff under ERG 140.
Firefighter training notes: Training for UN 2984 should emphasize exposure routes, SCBA use, vapor/dust monitoring, decontamination, runoff containment and SDS verification. Use ERG 140, SDS and local SOP.
Regulatory context: Hydrogen peroxide, aqueous solution, with not less than 8% but less than 20% hydrogen peroxide is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Hydrogen peroxide, aqueous solution, with not less than 8% but less than 20% hydrogen peroxide should be stored in compatible vented peroxide-rated containers away from heat, sunlight, metals, organics, reducing agents and contamination.
UN 2984 Quick Details
Common Hazards of UN 2984
- OXIDIZING hydrogen peroxide solution; can intensify fire involving combustibles.
- Concentration is below strong-peroxide entries but contamination can still accelerate decomposition.
- Contact with organics, metals, dirt, reducing agents or incompatible containers may release oxygen and heat.
- Solution can irritate or burn eyes, skin and respiratory tissue.
- Closed containers may pressurize if decomposition occurs.
- Runoff may be oxidizing and harmful to waterways.
- Exact concentration and stabilizer condition should be verified from SDS.
Chemical Identity & Physical Properties
Clear, colorless liquid with a slightly sharp odor. Aqueous solution is stable at concentrations below 20% at room temperature.
| Also known as | hydrogen dioxideperoxidehydrogen peroxide solutionperhydrol dilute |
| CAS Number | 7722-84-1 |
| Appearance | Clear, colorless liquid with a slightly sharp odor. Aqueous solution is stable at concentrations below 20% at room temperature. |
| Flash Point | Not applicable (non-flammable oxidizer) |
| Boiling Point | 108C (226F) for 35% solution; varies with concentration |
| Vapor Density | 1.4 (heavier than air) |
| Water Reactivity | Miscible with water; dilution generates heat but no violent reaction at these concentrations |
Fireground Response Guidance — UN 2984
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and chemical-resistant protective clothing. Level A may be needed for heavy vapor, fuming, splash risk or unknown concentrations.
Isolation & Evacuation
First Actions for a UN 2984 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 organics, metals, dirt, reducing agents and combustible contamination away from the oxidizer.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff and decontamination waste from spreading.
- 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 2984 — Hydrogen peroxide, aqueous solution, witUse 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.