UN 3265 — Corrosive liquid, acidic, organic, n.o.s.
Placard: Corrosive. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3265 Corrosive liquid, acidic, organic, n.o.s. is assigned to ERG Guide 153 for initial emergency response. Variable appearance depending on specific substance; typically a clear to amber liquid with pungent or irritating odor. Corrosive acidic organic compounds in liquid form at ambient temperature. 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. Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
Response guidance: For a UN 3265 incident, isolate the area, keep unauthorized personnel away, stay upwind/uphill and confirm the exact material from shipping papers and SDS. Use compatible extinguishing media and prevent contaminated runoff from entering waterways. Follow ERG Guide 153 and local incident command procedures.
UN 3265 Quick Details
Common Hazards of UN 3265
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury.
- Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
- 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.
- Combustible material: may burn but does not ignite readily.
- When heated, vapors may form explosive mixtures with air indoors, outdoors and in sewers.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a clear to amber liquid with pungent or irritating odor. Corrosive acidic organic compounds in liquid form at ambient temperature.
| Also known as | Corrosive liquid acidic organic NOSOrganic acid liquid NOSAcidic organic corrosive liquidUN3265 corrosive organic acid |
| Appearance | Variable appearance depending on specific substance; typically a clear to amber liquid with pungent or irritating odor. Corrosive acidic organic compounds in liquid form at ambient temperature. |
| Flash Point | Variable - depends on specific organic acid compound; consult SDS for exact substance |
| Boiling Point | Variable - depends on specific organic acid compound; consult SDS for exact substance |
| Vapor Density | Variable - typically heavier than air for most organic acids |
| Water Reactivity | May react with water generating heat; some organic acids may dissolve readily while others react exothermically |
Fireground Response Guidance — UN 3265
Extinguishing Media
PPE Requirements
Level B minimum required; full face SCBA, chemical resistant suit with splash protection; neoprene or butyl rubber gloves; severe corrosion hazard to skin and eyes
Isolation & Evacuation
First Actions for a UN 3265 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 3265 — Corrosive liquid, acidic, organic, n.o.sUse 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.