UN 3093 — Corrosive liquid, oxidizing, n.o.s.
Placard: Corrosive. ERG Guide 157. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3093 is Corrosive liquid, oxidizing, n.o.s., a broad corrosive oxidizing liquid entry assigned to ERG Guide 157. Exact identity controls water reaction and fire tactics.
Hazard overview: CORROSIVE and OXIDIZING liquid, n.o.s.; contact can severely burn eyes, skin and respiratory tissue. Can intensify fire involving combustibles and incompatible materials. Water or moist air may release heat or toxic/corrosive gases depending on the exact product.
Response guidance: For UN 3093, isolate the area, remove combustibles/reducing agents and identify the exact oxidizer. Use compatible tactics and contain toxic/corrosive runoff under ERG 157.
Firefighter training notes: Training for UN 3093 should emphasize product verification, SCBA use, oxidizer/corrosive compatibility, vapor/dust monitoring, decontamination and runoff control. Use ERG 157, SDS and local SOP.
Regulatory context: Corrosive liquid, oxidizing, 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: Corrosive liquid, oxidizing, n.o.s. should be stored in compatible oxidizer/corrosive-rated containers away from combustibles, organics, fuels, reducing agents, heat and contamination.
UN 3093 Quick Details
Common Hazards of UN 3093
- CORROSIVE and OXIDIZING liquid, n.o.s.; contact can severely burn eyes, skin and respiratory tissue.
- Can intensify fire involving combustibles and incompatible materials.
- Water or moist air may release heat or toxic/corrosive gases depending on the exact product.
- Contact with fuels, organics, metals or reducing agents may cause violent reaction.
- Fire may produce toxic, corrosive and oxidizing gases.
- Runoff may be corrosive, oxidizing and harmful to waterways.
- Exact chemical identity must be verified before choosing water, foam or neutralization tactics.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to various colors with possible irritating or pungent odor. This is a generic shipping classification covering multiple corrosive and oxidizing liquids not otherwise specified.
| Also known as | Corrosive oxidizing liquid NOSOxidizing corrosive liquid not otherwise specifiedUN3093 |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to various colors with possible irritating or pungent odor. This is a generic shipping classification covering multiple corrosive and oxidizing liquids not otherwise specified. |
| Flash Point | Not applicable (oxidizing material) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Variable depending on specific substance; typically heavier than air |
| Water Reactivity | May react with water or moist air to release toxic, corrosive or flammable gases; reaction may generate significant heat increasing vapor concentration |
Fireground Response Guidance — UN 3093
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 3093 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 157, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3093 — Corrosive liquid, oxidizing, 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.