UN 2312 — Phenol, molten
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2312 is Phenol, molten, a toxic phenolic/aniline-type material assigned to ERG Guide 153. Skin absorption, molten contact and toxic smoke are key hazards.
Hazard overview: TOXIC phenolic/aniline-type material; inhalation, ingestion or skin absorption may cause severe injury. Skin absorption and contaminated clothing are major exposure concerns. Combustible material: may burn but does not ignite readily.
Response guidance: For a UN 2312 incident, verify the product with shipping papers, container markings, SDS and ERG Guide 153. Establish incident command, isolate the area, stay upwind, control ignition or incompatibility hazards, prevent runoff, dust or vapor spread and base entry/fire-control actions on monitoring and local SOP.
Firefighter training notes: Training for UN 2312 should emphasize toxic/corrosive exposure routes, contaminated clothing, toxic fire products, decontamination waste and runoff containment. Use ERG 153, SDS and local SOP.
Regulatory context: Phenol, molten is regulated as a hazardous material for transportation and emergency response purposes. Storage, workplace exposure, emergency planning, spill reporting, waste handling and environmental requirements vary by exact product, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, container markings and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Phenol, molten should be stored in tightly closed compatible containers in a secure toxic/corrosive-material area with secondary containment, restricted access, ventilation and waste/decontamination planning according to SDS.
UN 2312 Quick Details
Common Hazards of UN 2312
- TOXIC phenolic/aniline-type material; inhalation, ingestion or skin absorption may cause severe injury.
- Skin absorption and contaminated clothing are major exposure concerns.
- Combustible material: may burn but does not ignite readily.
- Molten material can cause severe thermal and chemical burns.
- Fire may produce nitrogen oxides, phenolic/aniline smoke and other toxic gases.
- Runoff may carry toxic contamination and harm waterways.
- Avoid all skin contact and control decontamination waste.
Chemical Identity & Physical Properties
White to pink crystalline solid at room temperature, turns to colorless to pale pink liquid when molten (above 41°C/106°F). Characteristic sweet, acrid, tarry odor.
| Also known as | carbolic acidhydroxybenzenephenylic acidbenzenolphenyl hydroxide |
| CAS Number | 108-95-2 |
| Appearance | White to pink crystalline solid at room temperature, turns to colorless to pale pink liquid when molten (above 41°C/106°F). Characteristic sweet, acrid, tarry odor. |
| Flash Point | 79°C (174°F) |
| Boiling Point | 182°C (360°F) |
| Vapor Density | 3.24 (heavier than air) |
| Water Reactivity | Moderately soluble in water (8.3 g/100mL at 20°C); no violent reaction but releases heat when dissolved |
Fireground Response Guidance — UN 2312
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, dust, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing selected from SDS; avoid all skin contact.
Isolation & Evacuation
First Actions for a UN 2312 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, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers or spilled material unless properly trained and wearing appropriate protective equipment.
- Prevent contaminated liquid, dust, residues, runoff and decontamination waste from spreading.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or release area and expand the perimeter for fire involvement, vapor spread, dust generation, water reaction or unknown product identity.
- Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 2312 — Phenol, moltenUse 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.