UN 3098 — Oxidizing liquid, corrosive, n.o.s.
Placard: Oxidizer. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3098 is Oxidizing liquid, corrosive, n.o.s., a broad oxidizing corrosive liquid assigned to ERG Guide 140. Contamination and corrosive exposure are key hazards.
Hazard overview: OXIDIZING and CORROSIVE liquid, n.o.s.; can intensify fire and cause severe burns. Contact with fuels, oils, organics, reducing agents or combustible material can cause violent reaction. Some products may decompose from heat, contamination or confinement.
Response guidance: For UN 3098, isolate the area, remove combustibles/reducing agents and identify the exact oxidizer. Use compatible tactics and contain toxic/corrosive runoff under ERG 140.
Firefighter training notes: Training for UN 3098 should emphasize product verification, SCBA use, oxidizer/corrosive compatibility, vapor/dust monitoring, decontamination and runoff control. Use ERG 140, SDS and local SOP.
Regulatory context: Oxidizing liquid, corrosive, n.o.s. is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation, temperature-control status and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Oxidizing liquid, corrosive, n.o.s. should be stored in compatible oxidizer/corrosive-rated containers away from combustibles, organics, fuels, reducing agents, heat and contamination.
UN 3098 Quick Details
Common Hazards of UN 3098
- OXIDIZING and CORROSIVE liquid, n.o.s.; can intensify fire and cause severe burns.
- Contact with fuels, oils, organics, reducing agents or combustible material can cause violent reaction.
- Some products may decompose from heat, contamination or confinement.
- Vapor, mist or splash can injure eyes, skin and respiratory tissue.
- Fire may produce toxic/corrosive gases.
- Runoff may be oxidizing, corrosive and harmful to waterways.
- Exact product and water compatibility must be verified from SDS.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a clear to colored liquid with corrosive properties and oxidizing characteristics at room temperature. May have irritating or pungent odor.
| Also known as | Oxidizing liquid, corrosive, not otherwise specifiedCorrosive oxidizer liquidUN3098 |
| Appearance | Variable appearance depending on specific substance; typically a clear to colored liquid with corrosive properties and oxidizing characteristics at room temperature. May have irritating or pungent odor. |
| Flash Point | Not applicable (oxidizer) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Variable depending on specific substance |
| Water Reactivity | May react with water generating heat; corrosive solution formed |
Fireground Response Guidance — UN 3098
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and chemical-resistant protective clothing. Level A or B may be needed for unknown product, heavy vapor, dust, splash or fuming risk.
Isolation & Evacuation
First Actions for a UN 3098 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, mist, smoke or fumes and avoid skin or eye contact.
- Keep combustibles, organics, fuels and reducing agents 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 3098 — Oxidizing liquid, corrosive, n.o.s.Use 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.