☣️ UN 3484 • CLASS 8
UN 3484 — Hydrazine aqueous solution, flammable, with more than 37% hydrazine
Placard: Corrosive. ERG Guide 132. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
Advertisement
UN 3484 Quick Details
UN 3484
Product name: Hydrazine aqueous solution, flammable, with more than 37% hydrazine
DOT Class: 8
Placard type: Corrosive
ERG Guide: 132 (check current ERG)
Initial isolation: ERG 132: isolate spill 50m all directions; for large spill isolate 800m downwind; evacuate immediate area if fire involves tank car or trailer
Common Hazards of UN 3484
- Flammable/combustible material.
- May be ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
Chemical Identity & Physical Properties
| Also known as | Hydrazine hydrateDiamineHydrazine monohydrateLevoxine |
| CAS Number | 302-01-2 |
| Appearance | Colorless to pale yellow, fuming liquid with an ammonia-like odor. Hygroscopic and highly reactive. Fumes in moist air. |
| Flash Point | 38C (100F) for 64% solution; varies with concentration |
| Boiling Point | 113.5C (236F) for pure hydrazine hydrate |
| Vapor Density | 1.1 (heavier than air) |
| Water Reactivity | Miscible with water; dilution generates heat but does not react violently |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3484
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers
PPE Requirements
⚠️ Level A minimum for concentrated solutions; SCBA required; full chemical-resistant suit; avoid all skin contact due to severe corrosivity and carcinogenicity
Isolation & Evacuation
ERG 132: isolate spill 50m all directions; for large spill isolate 800m downwind; evacuate immediate area if fire involves tank car or trailer
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 132).
First Actions for a UN 3484 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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 for at least 50 meters (150 feet) in all directions.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
Advertisement
📋 Copy & Share Field Card
UN 3484 — Hydrazine aqueous solution, flammable, wHAZMAT RADIO NOTE — UN 3484
Product: Hydrazine aqueous solution, flammable, with more than 37% hydrazine
Class 8 / Corrosive / ERG 132
PPE: Level A minimum for concentrated solutions; SCBA required; full chemical-resistant suit; avoid all skin contact due to severe corrosivity and carcinogenicity
ISOLATION: ERG 132: isolate spill 50m all directions; for large spill isolate 800m downwind; evacuate immediate area if fire involves tank car or trailer
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 3484 — Hydrazine aqueous solution, flammable, with more than 37% hydrazine
Class: 8 | Placard: Corrosive | ERG Guide: 132
Appearance: Colorless to pale yellow, fuming liquid with an ammonia-like odor. Hygroscopic and highly reactive. Fumes in moist air.
Water Reactivity: Miscible with water; dilution generates heat but does not react violently
Extinguishing: Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers
PPE: Level A minimum for concentrated solutions; SCBA required; full chemical-resistant suit; avoid all skin contact due to severe corrosivity and carcinogenicity
Isolation: ERG 132: isolate spill 50m all directions; for large spill isolate 800m downwind; evacuate immediate area if fire involves tank car or trailer
— Key Hazards —
• Flammable/combustible material.
• May be ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• 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/3484 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3484 Hydrazine aqueous solution, flammable, with more than 37% hydrazine Cls8 ERG132 | allfirefighter.com/hazmat/un/3484SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/3484
Advertisement
Frequently Asked Questions about UN 3484
Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level A minimum for concentrated solutions; SCBA required; full chemical-resistant suit; avoid all skin contact due to severe corrosivity and carcinogenicity
Water reactivity: Miscible with water; dilution generates heat but does not react violently. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2; use water spray to cool containers.
ERG Guide 132 recommendation: ERG 132: isolate spill 50m all directions; for large spill isolate 800m downwind; evacuate immediate area if fire involves tank car or trailer
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 132 and your department SOP/SOG for incident-specific protective actions.
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.