UN 3096 — Corrosive solid, water-reactive, n.o.s.
Placard: Corrosive. ERG Guide 138. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3096 is Corrosive solid, water-reactive, n.o.s., a broad corrosive water-reactive solid assigned to ERG Guide 138. Moisture can release gas and corrosive heat.
Hazard overview: CORROSIVE water-reactive solid, n.o.s.; dust or solution can severely burn tissue. Water or moisture can release flammable, toxic or corrosive gases and heat. Some products may ignite on contact with moisture or react violently with water.
Response guidance: For UN 3096, isolate the area, exclude moisture and use SCBA with chemical protection. Use compatible dry media only until the exact product is confirmed by SDS and ERG 138.
Firefighter training notes: Training for UN 3096 should emphasize water exclusion, gas generation, dry-media choice, SCBA/chemical PPE, decontamination and runoff control. Use ERG 138, SDS and local SOP.
Regulatory context: Corrosive solid, water-reactive, 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 solid, water-reactive, n.o.s. should be stored dry in compatible corrosion-resistant containers away from water, moisture, acids/bases as incompatible, heat and ignition sources. Keep dry media available.
UN 3096 Quick Details
Common Hazards of UN 3096
- CORROSIVE water-reactive solid, n.o.s.; dust or solution can severely burn tissue.
- Water or moisture can release flammable, toxic or corrosive gases and heat.
- Some products may ignite on contact with moisture or react violently with water.
- May re-ignite after apparent extinguishment if reactive residue remains exposed.
- Water, foam or CO2 may worsen some reactions or spread burning/corrosive material.
- Fire may produce toxic/corrosive smoke and pressure hazards.
- Exact chemical identity must be verified before choosing extinguishing or spill-control media.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a solid material that may be crystalline, granular, or powder form. Color and odor vary by specific chemical composition. Corrosive to tissue and reactive with moisture.
| Also known as | Water-reactive corrosive solidCorrosive water-reactive substanceDangerous when wet corrosive solidCorrosive solid with water reactivity |
| Appearance | Variable appearance depending on specific substance; typically a solid material that may be crystalline, granular, or powder form. Color and odor vary by specific chemical composition. Corrosive to tissue and reactive with moisture. |
| Flash Point | Not applicable (water-reactive solid) |
| Boiling Point | Not applicable (varies by specific substance) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Reacts with water to produce flammable and/or toxic gases; may ignite spontaneously. Do not use water except in flooding quantities for large fires. May react violently or explosively with moisture. |
Fireground Response Guidance — UN 3096
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 3096 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 water or moisture contact controlled because gas generation or ignition may occur.
- 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 138, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3096 — Corrosive solid, water-reactive, 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.