UN 1672 — Phenylcarbylamine chloride
Placard: Toxic. ERG Guide 151. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1672 is Phenylcarbylamine chloride, a toxic corrosive material assigned to ERG Guide 151. Moisture or water contact can release corrosive and toxic fumes, making dry control and air monitoring important.
Hazard overview: UN 1672 presents toxic inhalation, corrosive fume and water-reactivity hazards. Vapors can collect in low areas, and runoff may spread corrosive toxic contamination.
Response guidance: For a UN 1672 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 151. Establish incident command, isolate the area, stay upwind, prevent dust or vapor exposure, control runoff and choose entry or cleanup actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1672 should emphasize water-reactive toxic/corrosive fumes, dry-agent selection, vapor control, decontamination and strict entry control. Use ERG 151, SDS and hazmat SOP.
Regulatory context: Phenylcarbylamine chloride is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, 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: Phenylcarbylamine chloride should be stored in tightly closed compatible containers in a cool, dry, well-ventilated secure area away from water, moisture, bases where incompatible, oxidizers, heat and unauthorized access. Protect containers from corrosion, leaks and impact.
UN 1672 Quick Details
Common Hazards of UN 1672
- TOXIC and CORROSIVE; inhalation, ingestion or skin/eye contact may cause severe injury.
- Water or moist air may release toxic and corrosive fumes.
- Reaction with water may generate heat and dense irritating vapor.
- Vapors are heavier than air and may collect in low or confined areas.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff may spread toxic and corrosive contamination.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a pungent, irritating odor. Lachrymatory (causes tearing). Corrosive and highly toxic.
| Also known as | Phenyl isocyanide dichlorideBenzenecarbonitrile dichloridePhenyl carbylamine dichlorideDichlorophenylmethylenimine |
| CAS Number | 622-44-6 |
| Appearance | Colorless to pale yellow liquid with a pungent, irritating odor. Lachrymatory (causes tearing). Corrosive and highly toxic. |
| Flash Point | Not readily available; handle as flammable liquid |
| Boiling Point | Approximately 195-200°C (383-392°F) with decomposition |
| Vapor Density | Heavier than air (vapor density >1) |
| Water Reactivity | Reacts with water and moisture, producing toxic and corrosive fumes including HCl |
Fireground Response Guidance — UN 1672
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and chemical protective clothing selected by hazmat specialists for vapor, fume, liquid or unknown exposure. Level A may be needed for close entry because toxic and corrosive fumes are possible.
Isolation & Evacuation
First Actions for a UN 1672 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, fumes, dust or mist and avoid all skin or eye contact.
- Keep water and moisture away from released product unless incident command confirms a compatible cooling or control use.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Avoid creating dust clouds or spreading contaminated liquid, powder, solution, runoff or debris.
- 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 dust, vapor, fire involvement or unknown concentration is present.
- Use ERG Guide 151, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1672 — Phenylcarbylamine chlorideUse 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.