UN 3122 — Poisonous liquid, oxidizing, n.o.s.
Placard: Toxic. ERG Guide 142. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3122 At a Glance
UN 3122 (Poisonous liquid, oxidizing) is listed as DOT Class 6 Toxic and is assigned to ERG Guide 142. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
Poisonous liquid, oxidizing, n.o.s. is a broad n.o.s. hazmat entry. The material family gives important initial clues, but responders must confirm the exact product, concentration and packaging from shipping papers and the SDS.
Hazard overview: Treat this entry as variable and product-specific. Main concerns include toxic exposure, fire or reaction hazards, container failure when heated, and incompatible contact with water, air, fuels or metals depending on the exact substance.
Response guidance: Set isolation, keep responders upwind and avoid direct contact. Do not apply water or foam to water-reactive material unless compatibility is confirmed. Use ERG guidance first, then refine with SDS, shipping papers and monitoring.
UN 3122 Quick Details
Common Hazards of UN 3122
- Oxidizing material can intensify fire and ignite combustibles, oils or reducing agents.
- Contamination with fuels, organics or incompatible materials may cause rapid reaction or explosion.
- Toxic by inhalation, ingestion or skin contact; dust, vapor or decomposition products may cause serious injury.
- Containers may rupture or explode when heated.
- Fire may produce irritating, toxic or corrosive smoke and runoff.
- Because this is an n.o.s. entry, the SDS and shipping papers define the exact hazards and response limits.
Chemical Identity & Physical Properties
Physical appearance is product-specific. This entry covers liquid materials that may vary in color, odor, concentration and packaging, so visual identification alone is not reliable.
| Also known as | Toxic liquid, oxidizing, n.o.s.Oxidizing poisonous liquidOxidizing toxic liquid, not otherwise specifiedUN3122 |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature. May be colorless to various colors with odor characteristics dependent on the specific oxidizing toxic chemical. |
| Flash Point | Not applicable (oxidizing agent) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Variable depending on specific substance; typically heavier than air |
| Water Reactivity | May react with water or produce heat/toxic fumes depending on exact oxidizer. Verify SDS before applying water directly. |
Fireground Response Guidance — UN 3122
Extinguishing Media
PPE Requirements
Use SCBA and chemical-resistant protection. Level A is preferred for unknown identity, vapor/gas release or major spill; Level B may be used only with monitoring and command approval.
Isolation & Evacuation
First Actions for a UN 3122 Incident
- Call 911 and the emergency response number shown on shipping papers.
- Keep unauthorized personnel away and establish an isolation zone.
- Stay upwind, uphill and upstream; avoid low areas where vapors or gases may collect.
- Avoid breathing vapors, dust, smoke or decomposition gases and avoid skin or eye contact.
- Do not touch damaged packages, containers or spilled material without proper PPE.
- Ventilate confined spaces only if responders are trained, equipped and monitoring the atmosphere.
- Use ERG, SDS, shipping papers and monitoring results for final isolation and response decisions.
📋 Copy & Share Field Card
UN 3122 — Poisonous liquid, oxidizing, 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.