UN 3267 — Corrosive liquid, basic, organic, n.o.s.
Placard: Corrosive. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3267 is Corrosive liquid, basic, organic, n.o.s., a broad alkaline organic corrosive liquid assigned to ERG Guide 153. Combustibility and exact base/SDS review are key.
Hazard overview: CORROSIVE basic organic liquid, n.o.s.; contact can severely burn eyes, skin and respiratory tissue. Many organic bases are combustible; heated vapors may form ignitable mixtures in low areas or sewers. Water mixing or acid neutralization may release heat and spread alkaline contamination.
Response guidance: For UN 3267, isolate the spill, avoid splash/mist exposure and use SCBA with chemical protection. Control water/neutralization hazards and contain corrosive runoff under ERG 153.
Firefighter training notes: Training for UN 3267 should emphasize corrosive splash/mist control, water/neutralization heat, incompatible materials, SCBA use and runoff containment. Use ERG 153, SDS and local SOP.
Regulatory context: Corrosive liquid, basic, organic, 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, composition, concentration and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Corrosive liquid, basic, organic, n.o.s. should be stored in compatible corrosion-resistant containers with secondary containment, ventilation and segregation from acids, metals where incompatible and reactive materials.
UN 3267 Quick Details
Common Hazards of UN 3267
- CORROSIVE basic organic liquid, n.o.s.; contact can severely burn eyes, skin and respiratory tissue.
- Many organic bases are combustible; heated vapors may form ignitable mixtures in low areas or sewers.
- Water mixing or acid neutralization may release heat and spread alkaline contamination.
- Vapors or mists may be toxic, irritating or corrosive depending on the exact amine/base.
- Fire may produce nitrogen oxides, carbon monoxide and irritating/toxic smoke.
- Runoff may be alkaline, toxic and harmful to waterways.
- Exact organic base, flash point and concentration must be verified from SDS.
Chemical Identity & Physical Properties
Variable appearance depending on specific chemical; typically a liquid at room temperature. N.o.s. entry covers various organic basic corrosive liquids not specifically listed elsewhere.
| Also known as | Corrosive liquid, basic, organic, n.o.s.Organic basic corrosive liquidAlkaline organic corrosive liquid |
| Appearance | Variable appearance depending on specific chemical; typically a liquid at room temperature. N.o.s. entry covers various organic basic corrosive liquids not specifically listed elsewhere. |
| Flash Point | Variable, depends on specific substance; consult SDS for exact chemical |
| Boiling Point | Variable, depends on specific substance; consult SDS for exact chemical |
| Vapor Density | Variable, depends on specific substance; typically heavier than air |
| Water Reactivity | May react with water generating heat; some organic bases react exothermically with water |
Fireground Response Guidance — UN 3267
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, mist, fire or confined-space exposure. Wear chemical-resistant splash suit, gloves, boots and eye/face protection.
Isolation & Evacuation
First Actions for a UN 3267 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.
- 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 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3267 — Corrosive liquid, 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.