UN 3410 — Chloro toluidine hydrochloride, solution
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3410 is Chloro toluidine hydrochloride, solution, a toxic chloro-toluidine solution assigned to ERG Guide 153. Aromatic amine exposure and runoff control are priorities.
Hazard overview: TOXIC chloro-toluidine hydrochloride solution; inhalation, ingestion or skin contact may cause severe injury. Aromatic amine salts may be absorbed through skin depending on concentration and formulation. Solution can be acidic or irritating and may contaminate clothing, tools and runoff.
Response guidance: For UN 3410, isolate the area, avoid skin contact and use SCBA where vapor, mist, dust or fire is present. Contain toxic runoff and follow SDS/ERG 153.
Firefighter training notes: Training for UN 3410 should emphasize exposure routes, SCBA use, vapor/mist monitoring, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: Chloro toluidine hydrochloride, solution is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, concentration, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Chloro toluidine hydrochloride, solution should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 3410 Quick Details
Common Hazards of UN 3410
- TOXIC chloro-toluidine hydrochloride solution; inhalation, ingestion or skin contact may cause severe injury.
- Aromatic amine salts may be absorbed through skin depending on concentration and formulation.
- Solution can be acidic or irritating and may contaminate clothing, tools and runoff.
- Combustibility depends on water content and any solvent present.
- Fire may produce hydrogen chloride, nitrogen oxides and toxic aromatic amine smoke.
- Runoff may be toxic and harmful to waterways.
- Exact concentration, pH and solvent content must be verified from SDS.
Chemical Identity & Physical Properties
White to tan crystalline solid dissolved in solution. May appear as yellowish liquid depending on concentration and solvent. Mild amine-like odor.
| Also known as | 4-chloro-2-methylaniline hydrochloridep-chloro-o-toluidine hydrochloride2-methyl-4-chloroaniline hydrochloridePCOT hydrochloride |
| CAS Number | 3165-93-3 |
| Appearance | White to tan crystalline solid dissolved in solution. May appear as yellowish liquid depending on concentration and solvent. Mild amine-like odor. |
| Flash Point | Depends on solvent; aqueous solutions typically not flammable; organic solvent solutions vary by carrier |
| Boiling Point | Depends on solvent and concentration; pure compound decomposes above 245C (473F) |
| Vapor Density | Not applicable for solution; vapors heavier than air if volatile solvents present |
| Water Reactivity | No significant reaction with water; hydrochloride salt is water-soluble |
Fireground Response Guidance — UN 3410
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA where vapor, mist, smoke or fire is present. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 3410 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 3410 — Chloro toluidine hydrochloride, solutionUse 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.