☣️ UN 3289 • CLASS 6
UN 3289 — Poisonous liquid, corrosive, inorganic, n.o.s.
Placard: Toxic. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
UN 3289 At a Glance
UN 3289 (Poisonous liquid, corrosive, inorganic) is listed as DOT Class 6 Toxic and is assigned to ERG Guide 154. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
Poisonous liquid, corrosive, inorganic, n.o.s. is both toxic and corrosive, so responders must treat any unknown release as a contact, inhalation and burn hazard until the exact inorganic compound is identified.
Hazard overview: Toxic corrosive inorganic liquid can cause poisoning and severe chemical burns. Heating, fire or incompatible water contact may produce toxic or corrosive vapors, and some formulations can react with metals.
Response guidance: Isolate the area, stay upwind and avoid direct liquid or solid contact. Use ERG Guide 154, shipping papers and SDS to choose compatible control agents and protect drains from contaminated runoff.
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UN 3289 Quick Details
UN 3289
Product name: Poisonous liquid, corrosive, inorganic, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; if tank/railcar involved in fire isolate 800m all directions
Common Hazards of UN 3289
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury.
- Contact with molten substance may cause severe burns to skin and eyes.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be toxic, corrosive or environmentally harmful.
- The substance may decompose when heated and produce corrosive or toxic fumes.
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
Chemical Identity & Physical Properties
Variable appearance depending on specific chemical; typically a clear to colored liquid at room temperature. N.o.s. entry covers various inorganic toxic and corrosive liquids not specifically listed elsewhere.
| Also known as | Toxic corrosive liquid inorganic NOSPoisonous corrosive liquid inorganic not otherwise specifiedCorrosive toxic liquid inorganic |
| Appearance | Variable appearance depending on specific chemical; typically a clear to colored liquid at room temperature. N.o.s. entry covers various inorganic toxic and corrosive liquids not specifically listed elsewhere. |
| Flash Point | Not applicable (non-flammable inorganic liquid) |
| Boiling Point | Variable depending on specific substance |
| Vapor Density | Variable, typically heavier than air for most inorganic liquid vapors |
| Water Reactivity | Variable; some may react violently with water generating heat and toxic gases, others stable in water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3289
Extinguishing Media
Do not use water spray directly; use dry chemical, CO2, or appropriate agent for specific chemical if known
PPE Requirements
⚠️ Level A or B minimum; full chemical protective suit, SCBA required; avoid all skin and eye contact; use acid/base resistant gloves and boots
Level A or B minimum; full chemical protective suit, SCBA required; avoid all skin and eye contact; use acid/base resistant gloves and boots.
Isolation & Evacuation
ERG 154: isolate spill 25-50m all directions; evacuate immediate area; if tank/railcar involved in fire isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 3289 Incident
- CALL 911, then contact the emergency response telephone number shown on shipping papers, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials, increase downwind protective distance based on conditions and incident command guidance.
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UN 3289 — Poisonous liquid, corrosive, inorganic,HAZMAT RADIO NOTE — UN 3289
Product: Poisonous liquid, corrosive, inorganic, n.o.s.
Class 6 / Toxic / ERG 154
PPE: Level A or B minimum; full chemical protective suit, SCBA required; avoid all skin and eye contact; use acid/base resistant gloves and boots
ISOLATION: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; if tank/railcar involved in fire isolate 800m all directions
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3289 — Poisonous liquid, corrosive, inorganic, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 154
Appearance: Variable appearance depending on specific chemical; typically a clear to colored liquid at room temperature. N.o.s. entry covers various inorganic toxic and corrosive liquids not specifically listed elsewhere.
Water Reactivity: Variable; some may react violently with water generating heat and toxic gases, others stable in water
Extinguishing: Do not use water spray directly; use dry chemical, CO2, or appropriate agent for specific chemical if known
PPE: Level A or B minimum; full chemical protective suit, SCBA required; avoid all skin and eye contact; use acid/base resistant gloves and boots
Isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; if tank/railcar involved in fire isolate 800m all directions
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury.
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— First Actions —
• CALL 911, then contact the emergency response telephone number shown on shipping papers, if available.
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/poisonous-liquid-corrosive-inorganic-un-3289 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3289 Poisonous liquid, corrosive, inorganic, n.o.s. Cls6 ERG154 | allfirefighter.com/hazmat/un/poisonous-liquid-corrosive-inorganic-un-3289SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/poisonous-liquid-corrosive-inorganic-un-3289
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Frequently Asked Questions about UN 3289
UN 3289 is Poisonous liquid, corrosive, inorganic, n.o.s., assigned to ERG Guide 154 and placarded as Toxic.
Yes. Toxic corrosive inorganic liquid presents a serious toxic exposure hazard; avoid inhalation, ingestion, skin contact and contaminated runoff.
Yes, corrosive effects are possible. Avoid skin and eye contact and use chemical-resistant protection.
Use caution. Variable; some may react violently with water generating heat and toxic gases, others stable in water
Do not use water spray directly; use dry chemical, CO2, or appropriate agent for specific chemical if known.
Level A or B minimum; full chemical protective suit, SCBA required; avoid all skin and eye contact; use acid/base resistant gloves and boots.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.