UN 3084 — Corrosive solid, oxidizing, n.o.s.
Placard: Corrosive. ERG Guide 157. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3084 is Corrosive solid, oxidizing, n.o.s., a broad corrosive oxidizing solid assigned to ERG Guide 157. Product identity controls water and fire tactics.
Hazard overview: CORROSIVE and OXIDIZING solid, n.o.s.; dust or solution can burn eyes, skin and respiratory tissue. Can intensify fire involving combustibles and incompatible materials. Reaction with water or moist air may release heat and toxic/corrosive gases depending on the exact substance.
Response guidance: For UN 3084, isolate the area, keep combustibles/reducing agents away and identify the exact product. Use oxidizer-compatible tactics and contain runoff under ERG 157.
Firefighter training notes: Training for UN 3084 should emphasize product verification, incompatible media, dust control, SCBA use, runoff containment and escalation criteria. Use ERG 157, SDS and local SOP.
Regulatory context: Corrosive solid, 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 and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Corrosive solid, oxidizing, n.o.s. should be stored in compatible oxidizer/corrosive-rated containers away from combustibles, organics, fuels, reducing agents, moisture-sensitive materials and contamination.
UN 3084 Quick Details
Common Hazards of UN 3084
- CORROSIVE and OXIDIZING solid, n.o.s.; dust or solution can burn eyes, skin and respiratory tissue.
- Can intensify fire involving combustibles and incompatible materials.
- Reaction with water or moist air may release heat and toxic/corrosive gases depending on the exact substance.
- 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 environmentally harmful.
- Exact chemical identity must be verified before selecting extinguishing media.
Chemical Identity & Physical Properties
Variable appearance depending on specific chemical; typically a solid material that is both corrosive and has oxidizing properties. May be crystalline, granular, or powder form with color varying by composition.
| Also known as | Corrosive oxidizing solidOxidizing corrosive solid NOSUN3084 |
| Appearance | Variable appearance depending on specific chemical; typically a solid material that is both corrosive and has oxidizing properties. May be crystalline, granular, or powder form with color varying by composition. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Not applicable (varies by specific substance) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with water or moist air releasing toxic, corrosive, or flammable gases with significant heat generation |
Fireground Response Guidance — UN 3084
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 or splash risk.
Isolation & Evacuation
First Actions for a UN 3084 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 water or moisture contact controlled when it may increase fuming, heat or corrosive runoff.
- 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 3084 — Corrosive solid, 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.