UN 2433 — Chloronitrotoluenes, liquid
Placard: Toxic. ERG Guide 152. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2433 At a Glance
UN 2433 (Chloronitrotoluenes, liquid) is listed as DOT Class 6 Toxic and is assigned to ERG Guide 152. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 2433 is Chloronitrotoluenes, liquid, a highly toxic chloronitroaromatic liquid assigned to ERG Guide 152. Isomer mixture and SDS should be verified before close action.
Hazard overview: HIGHLY TOXIC chloronitroaromatic liquid; inhalation, ingestion or skin absorption may be fatal. Skin contact and contaminated clothing can extend exposure. Combustible liquid: may burn but does not ignite readily.
Response guidance: For UN 2433, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain toxic/corrosive runoff and verify exact product controls with SDS and ERG 152.
Firefighter training notes: Training for UN 2433 should emphasize toxic/corrosive exposure routes, skin absorption, SCBA use, decontamination, runoff containment and SDS verification. Use ERG 152, SDS and local SOP.
Regulatory context: Chloronitrotoluenes, liquid is regulated as a hazardous material for transport and emergency response. Storage, exposure, spill reporting, waste and fire-code duties depend on quantity, concentration and jurisdiction; verify shipping papers, SDS and local authority requirements.
Storage & handling: Chloronitrotoluenes, liquid should be stored in tightly closed compatible containers in a secure toxic/corrosive-material area with ventilation, secondary containment, restricted access and SDS-based segregation.
UN 2433 Quick Details
Common Hazards of UN 2433
- HIGHLY TOXIC chloronitroaromatic liquid; inhalation, ingestion or skin absorption may be fatal.
- Skin contact and contaminated clothing can extend exposure.
- Combustible liquid: may burn but does not ignite readily.
- Denser-than-water liquid may form a separate layer and spread contamination.
- Fire may produce hydrogen chloride, nitrogen oxides and toxic chlorinated smoke.
- Runoff may be toxic, persistent and environmentally harmful.
- Exact isomer mixture should be verified from SDS and shipping papers.
Chemical Identity & Physical Properties
Yellow to amber oily liquid with a faint aromatic odor. Mixture of isomers including ortho-, meta-, and para-chloronitrotoluenes. Denser than water and insoluble.
| Also known as | ChloronitrotoluenesCNTChloronitrotoluolNitrotoluene chloride isomersToluidine precursors |
| Appearance | Yellow to amber oily liquid with a faint aromatic odor. Mixture of isomers including ortho-, meta-, and para-chloronitrotoluenes. Denser than water and insoluble. |
| Flash Point | 127°C (261°F) closed cup |
| Boiling Point | 235-245°C (455-473°F) depending on isomer |
| Vapor Density | 5.9 (much heavier than air) |
| Water Reactivity | No significant reaction with water; insoluble and forms separate layer |
Fireground Response Guidance — UN 2433
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and clothing; avoid skin contact.
Isolation & Evacuation
First Actions for a UN 2433 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 dust, liquid, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 152, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2433 — Chloronitrotoluenes, liquidUse 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.