UN 1602 — Dye intermediate, liquid, poisonous, n.o.s.
Placard: Toxic. ERG Guide 151. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1602 is Dye intermediate, liquid, poisonous, n.o.s., a toxic not-otherwise-specified material assigned to ERG Guide 151. Because the exact active ingredient varies, shipping papers and SDS are essential before choosing entry, cleanup or fire-control actions.
Hazard overview: UN 1602 presents toxic exposure and formulation-dependent hazards. It may be combustible, corrosive, oxidizing or water-reactive depending on the product, and runoff should be controlled as toxic contamination.
Response guidance: For a UN 1602 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 1602 should emphasize toxic exposure routes, air monitoring, PPE selection, decontamination and preventing contaminated runoff. Use ERG 151, SDS and local SOP.
Regulatory context: Dye intermediate, liquid, poisonous, n.o.s. 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: Dye intermediate, liquid, poisonous, n.o.s. should be stored in tightly closed compatible containers in a secure toxic-material area according to SDS and local hazardous materials procedures.
UN 1602 Quick Details
Common Hazards of UN 1602
- TOXIC not-otherwise-specified material; exact hazards depend on the formulation and active ingredient.
- May be harmful or fatal if inhaled, ingested or absorbed through skin.
- Dust, vapor or solution may irritate or injure eyes, skin and respiratory tissue.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff may carry toxic contamination to drains or waterways.
- Some formulations may be combustible, oxidizing, corrosive or water-reactive; verify SDS.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Liquid of varying color depending on specific compound, typically clear to dark colored with varying odor. Physical and chemical properties vary widely as this is a n.o.s. (not otherwise specified) classification covering multiple dye intermediates.
| Also known as | Toxic dye intermediate liquidPoisonous dye intermediateDye precursor liquidIntermediate for dye manufacturing |
| Appearance | Liquid of varying color depending on specific compound, typically clear to dark colored with varying odor. Physical and chemical properties vary widely as this is a n.o.s. (not otherwise specified) classification covering multiple dye intermediates. |
| Flash Point | Varies by specific compound - consult SDS for exact product |
| Boiling Point | Varies by specific compound - consult SDS for exact product |
| Vapor Density | Varies by specific compound - typically heavier than air |
| Water Reactivity | Generally no violent reaction with water, but may dissolve and contaminate water sources |
Fireground Response Guidance — UN 1602
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Chemical-resistant gloves, eye/face protection and protective clothing should be selected from SDS because the exact formulation controls exposure risk.
Isolation & Evacuation
First Actions for a UN 1602 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.
- 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, molten material or runoff.
- 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 151, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1602 — Dye intermediate, liquid, poisonous, n.oUse 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.