☣️ UN 3417 • CLASS 6
UN 3417 — Xylyl bromide, solid
Placard: Toxic. ERG Guide 152. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 3417 is Xylyl bromide, solid, a toxic lachrymator solid used as a chemical intermediate. It can release irritating vapors when heated or handled improperly.
Hazard overview: UN 3417 is highly toxic by inhalation, ingestion and skin contact, and dust or vapors can severely irritate eyes and respiratory tissues. Molten material can cause burns, and heating may produce hydrogen bromide and other toxic gases.
Response guidance: For UN 3417, isolate the spill, avoid dust generation and keep responders upwind. Use dry chemical, CO2 or dry sand for small fires; water spray may be used from a distance to cool containers but should not spread contamination.
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UN 3417 Quick Details
UN 3417
Product name: Xylyl bromide, solid
DOT Class: 6
Placard type: Toxic
ERG Guide: 152 (check current ERG)
Initial isolation: ERG 152: isolate spill/leak area immediate 25m in all directions; large spill initial isolation 100m, protective action distance 300m downwind daytime
Common Hazards of UN 3417
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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 corrosive and/or toxic and cause environmental
- Combustible material: may burn but does not ignite readily.
- Containers may explode when heated.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
Chemical Identity & Physical Properties
UN 3417 is generally a white to pale yellow crystalline solid with a pungent, irritating odor. It may volatilize or melt when heated, increasing inhalation and contact hazards.
| Also known as | Xylyl bromideBromoxyleneDimethylbenzyl bromideα-Bromo-xylene |
| Appearance | White to pale yellow crystalline solid at room temperature. Pungent, irritating odor. Lachrymator (tear-producing agent). |
| Flash Point | Not applicable (solid) |
| Boiling Point | Approximately 212-220C (414-428F) depending on isomer |
| Vapor Density | 6.6 (heavier than air when volatilized) |
| Water Reactivity | Slowly hydrolyzes in water, releasing HBr vapors; avoid prolonged water contact |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3417
Extinguishing Media
Dry chemical, CO2, or dry sand preferred; water spray may be used from distance to cool containers
PPE Requirements
⚠️ Level A required for spill response; SCBA mandatory; full chemical-resistant suit; avoid all skin contact due to extreme toxicity
Use SCBA and full chemical-resistant protective clothing. Level A is appropriate for significant spills, unknown airborne concentration or confined areas; avoid all skin and eye contact.
Isolation & Evacuation
ERG 152: isolate spill/leak area immediate 25m in all directions; large spill initial isolation 100m, protective action distance 300m downwind daytime
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 152).
First Actions for a UN 3417 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- 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 the immediate precautionary measure distance, in the downwind
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📋 Copy & Share Field Card
UN 3417 — Xylyl bromide, solidHAZMAT RADIO NOTE — UN 3417
Product: Xylyl bromide, solid
Class 6 / Toxic / ERG 152
PPE: Level A required for spill response; SCBA mandatory; full chemical-resistant suit; avoid all skin contact due to extreme toxicity
ISOLATION: ERG 152: isolate spill/leak area immediate 25m in all directions; large spill initial isolation 100m, protective action distance 300m downwind daytime
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 3417 — Xylyl bromide, solid
Class: 6 | Placard: Toxic | ERG Guide: 152
Appearance: White to pale yellow crystalline solid at room temperature. Pungent, irritating odor. Lachrymator (tear-producing agent).
Water Reactivity: Slowly hydrolyzes in water, releasing HBr vapors; avoid prolonged water contact
Extinguishing: Dry chemical, CO2, or dry sand preferred; water spray may be used from distance to cool containers
PPE: Level A required for spill response; SCBA mandatory; full chemical-resistant suit; avoid all skin contact due to extreme toxicity
Isolation: ERG 152: isolate spill/leak area immediate 25m in all directions; large spill initial isolation 100m, protective action distance 300m downwind daytime
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— First Actions —
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• 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.
SOURCE: allfirefighter.com/hazmat/un/xylyl-bromide-solid-un-3417 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3417 Xylyl bromide, solid Cls6 ERG152 | allfirefighter.com/hazmat/un/xylyl-bromide-solid-un-3417SMS / 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/xylyl-bromide-solid-un-3417
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Frequently Asked Questions about UN 3417
UN 3417 is Xylyl bromide, solid. It should be identified from shipping papers, markings and the SDS before responders work near the release.
ERG Guide 152 applies to UN 3417 for initial isolation, protective actions and first-response guidance.
UN 3417 is not primarily classified as flammable, but fire may produce toxic or corrosive gases and containers may become dangerous when heated.
Use SCBA and full chemical-resistant protective clothing. Level A is appropriate for significant spills, unknown airborne concentration or confined areas; avoid all skin and eye contact.
UN 3417 is highly toxic by inhalation, ingestion and skin contact, and dust or vapors can severely irritate eyes and respiratory tissues.
For UN 3417, isolate the spill, avoid dust generation and keep responders upwind.
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.