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 At a Glance
UN 3084 (Corrosive solid, oxidizing) is listed as DOT Class 8 Corrosive and is assigned to ERG Guide 157. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
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.