☣️ UN 3263 • CLASS 8
Corrosive solid, basic, organic, n.o.s.
Placard: Corrosive. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 3263
Class: 8
Placard type: Corrosive
ERG: Guide 154 (check current ERG)
Isolation: ERG 154: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 50m downwind; if fire, isolate 800m and evacuate 800m
Chemical & Response Details
| 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 |
| Extinguishing | Do not use water directly on material; dry chemical, soda ash, or lime for small spills; avoid foam due to corrosive nature |
| PPE | ⚠️ 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 | ERG 154: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 50m downwind; if fire, isolate 800m and evacuate 800m |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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
- 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.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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 at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 3263 — Corrosive solid, basic, organic, n.o.s. HAZMAT RADIO NOTE — UN 3263
Product: Corrosive solid, basic, organic, n.o.s.
Class 8 / Corrosive / ERG 154
PPE: 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: ERG 154: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 50m downwind; if fire, isolate 800m and evacuate 800m
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3263 — Corrosive solid, basic, organic, n.o.s.
Class: 8 | Placard: Corrosive | ERG Guide: 154
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.
Water Reactivity: Dissolves in water forming strongly alkaline corrosive solutions; no violent reaction but generates heat
Extinguishing: Do not use water directly on material; dry chemical, soda ash, or lime for small spills; avoid foam due to corrosive nature
PPE: 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: ERG 154: isolate spill area at least 25m in all directions; for large spills isolate 50m and consider evacuation of 50m downwind; if fire, isolate 800m and evacuate 800m
— Key Hazards —
• 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.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3263 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3263 Corrosive solid, basic, organic, n.o.s. Cls8 ERG154 | allfirefighter.com/hazmat/un/3263SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/3263
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FAQ
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 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.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
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
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.