☣️ UN 2609 • CLASS 6
UN 2609 — Triallyl borate
Placard: Toxic. ERG Guide 156. 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.
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UN 2609 Quick Details
UN 2609
Product name: Triallyl borate
DOT Class: 6
Placard type: Toxic
ERG Guide: 156 (check current ERG)
Initial isolation: ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 800m and evacuate downwind
Common Hazards of UN 2609
- Combustible material: may burn but does not ignite readily.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapors may travel to source of ignition and flash back.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
Chemical Identity & Physical Properties
| Also known as | Triallyl borateBoric acid triallyl esterAllyl borateTri(2-propenyl) borate |
| CAS Number | 7397-46-8 |
| Appearance | Colorless to pale yellow liquid with a characteristic ester-like odor. Liquid at room temperature. |
| Flash Point | 43°C (109°F) |
| Boiling Point | 120-130°C (248-266°F) at reduced pressure |
| Vapor Density | 3.4 (heavier than air) |
| Water Reactivity | Reacts with water releasing flammable vapors and boric acid; avoid direct water contact |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2609
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical preferred; water spray for cooling only
PPE Requirements
⚠️ Level B minimum; SCBA and chemical-resistant suit required; avoid all contact
Isolation & Evacuation
ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 800m and evacuate downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 156).
First Actions for a UN 2609 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 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 2609 — Triallyl borateHAZMAT RADIO NOTE — UN 2609
Product: Triallyl borate
Class 6 / Toxic / ERG 156
PPE: Level B minimum; SCBA and chemical-resistant suit required; avoid all contact
ISOLATION: ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 800m and evacuate downwind
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 2609 — Triallyl borate
Class: 6 | Placard: Toxic | ERG Guide: 156
Appearance: Colorless to pale yellow liquid with a characteristic ester-like odor. Liquid at room temperature.
Water Reactivity: Reacts with water releasing flammable vapors and boric acid; avoid direct water contact
Extinguishing: Alcohol-resistant foam, CO2, dry chemical preferred; water spray for cooling only
PPE: Level B minimum; SCBA and chemical-resistant suit required; avoid all contact
Isolation: ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 800m and evacuate downwind
— Key Hazards —
• Combustible material: may burn but does not ignite readily.
• Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— 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/2609 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2609 Triallyl borate Cls6 ERG156 | ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 80 | allfirefighter.com/hazmat/un/2609SMS / 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/2609
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Frequently Asked Questions about UN 2609
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapors may travel to source of ignition and flash back. Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
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 B minimum; SCBA and chemical-resistant suit required; avoid all contact
Water reactivity: Reacts with water releasing flammable vapors and boric acid; avoid direct water contact. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical preferred; water spray for cooling only.
ERG Guide 156 recommendation: ERG 156: isolate spill 25-50m all directions; if large spill or fire, isolate 800m and evacuate downwind
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 156 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.