UN 1548 — Aniline hydrochloride
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1548 is Aniline hydrochloride, a toxic hazardous material assigned to ERG Guide 153. Responders should verify the exact product with shipping papers, container markings and SDS before close action.
Hazard overview: UN 1548 presents toxic exposure hazards by inhalation, ingestion or skin contact. Fire, decomposition or runoff may produce toxic contamination and require air monitoring, isolation and decontamination.
Response guidance: For a UN 1548 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 153. Establish incident command, isolate the area, stay upwind, prevent incompatible contact and choose extinguishing or spill-control actions based on ERG, SDS and local SOP.
Firefighter training notes: Training for UN 1548 should emphasize toxic exposure routes, dust/vapor control, SCBA use, decontamination and avoiding skin contact. Use ERG 153, SDS and local SOP.
Regulatory context: Aniline hydrochloride is regulated as a toxic hazardous material. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Aniline hydrochloride should be stored in tightly closed compatible containers in a secure, cool, dry, well-ventilated toxic-material area away from food, combustibles where incompatible, heat and unauthorized access. Prevent dust release, leaks and contaminated runoff.
UN 1548 Quick Details
Common Hazards of UN 1548
- TOXIC material; may be harmful or fatal if inhaled, ingested or absorbed through skin.
- Avoid breathing vapors, dust or mist and avoid skin or eye contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff may carry toxic contamination and may pollute waterways.
- Containers may rupture or explode when heated.
- Specific toxicity and absorption risk should be confirmed from shipping papers and SDS.
Chemical Identity & Physical Properties
White to grayish crystalline solid or powder. Darkens on exposure to light. Odorless to slight amine odor.
| Also known as | Aniline chlorideBenzenamine hydrochloridePhenylamine hydrochlorideAniline HClAnilinium chloride |
| CAS Number | 142-04-1 |
| Appearance | White to grayish crystalline solid or powder. Darkens on exposure to light. Odorless to slight amine odor. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | 245C (473F) with decomposition |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; forms acidic solution. No violent reaction. |
Fireground Response Guidance — UN 1548
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS; avoid all skin contact and contaminated dust.
Isolation & Evacuation
First Actions for a UN 1548 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.
- Avoid breathing vapors, dust or mist and avoid all skin or eye contact.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or leak area and expand the perimeter if vapor, dust, fire involvement or unknown concentration is present.
- Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1548 — Aniline hydrochlorideUse 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.