UN 3263 — Corrosive solid, basic, organic, n.o.s.
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3263 Corrosive solid, basic, organic, n.o.s. is assigned to ERG Guide 154 for initial emergency response. Solid material at room temperature, typically white to off-white or colored crystalline or powdered substance. May have slight odor depending on specific organic base compound. Forms corrosive alkaline solutions in water. Verify the exact product from shipping papers and SDS before selecting tactics.
Hazard overview: Primary hazards: a corrosive hazardous material that can cause severe skin, eye and respiratory injury. TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury. Contact with molten substance may cause severe burns to skin and eyes.
Response guidance: For a UN 3263 incident, isolate the area, keep unauthorized personnel away, stay upwind/uphill and confirm the exact material from shipping papers and SDS. Avoid direct water or foam unless incident command confirms compatibility; use dry agents such as dry chemical, dry sand, lime or soda ash when specified. Follow ERG Guide 154 and local incident command procedures.
UN 3263 Quick Details
Common Hazards of UN 3263
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury.
- Contact with molten substance may cause severe burns to skin and eyes.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental contamination.
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive.
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
Chemical Identity & Physical Properties
Solid material at room temperature, typically white to off-white or colored crystalline or powdered substance. May have slight odor depending on specific organic base compound. Forms corrosive alkaline solutions in water.
| Also known as | Corrosive solid, basic, organic, n.o.s.Organic basic corrosive solidAlkaline organic solidBasic organic corrosive material |
| Appearance | Solid material at room temperature, typically white to off-white or colored crystalline or powdered substance. May have slight odor depending on specific organic base compound. Forms corrosive alkaline solutions in water. |
| Flash Point | Not applicable (non-flammable corrosive solid) |
| Boiling Point | Varies by specific compound; many decompose before boiling at elevated temperatures |
| Vapor Density | Not applicable (solid material with negligible vapor pressure at ambient temperature) |
| Water Reactivity | Dissolves in water forming strongly alkaline corrosive solutions; no violent reaction but generates heat |
Fireground Response Guidance — UN 3263
Extinguishing Media
PPE Requirements
Level B minimum for significant spills; full face shield, rubber boots, acid-resistant gloves, chemical-resistant suit; SCBA required in confined spaces or fire conditions
Isolation & Evacuation
First Actions for a UN 3263 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and 25 meters (75 feet) for solids.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials, increase the initial isolation distance in the downwind direction as needed.
📋 Copy & Share Field Card
UN 3263 — Corrosive solid, basic, organic, 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.