☣️ UN 1694 • CLASS 6
UN 1694 — Bromobenzyl cyanides, liquid
Placard: Toxic. ERG Guide 159. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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 1694 Quick Details
UN 1694
Product name: Bromobenzyl cyanides, liquid
DOT Class: 6
Placard type: Toxic
ERG Guide: 159 (check current ERG)
Initial isolation: ERG 159: isolate spill 25m all directions; for large spill isolate 50m and evacuate 300m downwind initially
Common Hazards of UN 1694
- Inhalation of vapors or dust is extremely irritating.
- May cause burning of eyes and lachrymation (flow of tears).
- May cause coughing, difficult breathing and nausea.
- Brief exposure effects last only a few minutes.
- Exposure in an enclosed area may be very harmful.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may cause environmental contamination.
- Some of these materials may burn, but none ignite readily.
Chemical Identity & Physical Properties
| Also known as | alpha-Bromobenzyl cyanideBromobenzylnitrileCA (riot control agent)BBCPhenylbromoacetonitrile |
| CAS Number | 5798-79-8 |
| Appearance | Colorless to pale yellow liquid with a pungent, irritating odor. Lachrymator (tear-producing agent) at room temperature. |
| Flash Point | 113C (235F) |
| Boiling Point | 242C (468F) - decomposes |
| Vapor Density | 6.8 (heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1694
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical, water spray for cooling
PPE Requirements
⚠️ Level A required for lachrymator exposure; full-face SCBA mandatory; chemical-resistant suit; avoid all contact
Isolation & Evacuation
ERG 159: isolate spill 25m all directions; for large spill isolate 50m and evacuate 300m downwind initially
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 159).
First Actions for a UN 1694 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
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 1694 — Bromobenzyl cyanides, liquidHAZMAT RADIO NOTE — UN 1694
Product: Bromobenzyl cyanides, liquid
Class 6 / Toxic / ERG 159
PPE: Level A required for lachrymator exposure; full-face SCBA mandatory; chemical-resistant suit; avoid all contact
ISOLATION: ERG 159: isolate spill 25m all directions; for large spill isolate 50m and evacuate 300m downwind initially
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 1694 — Bromobenzyl cyanides, liquid
Class: 6 | Placard: Toxic | ERG Guide: 159
Appearance: Colorless to pale yellow liquid with a pungent, irritating odor. Lachrymator (tear-producing agent) at room temperature.
Water Reactivity: No significant reaction with water; slightly soluble
Extinguishing: Alcohol-resistant foam, CO2, dry chemical, water spray for cooling
PPE: Level A required for lachrymator exposure; full-face SCBA mandatory; chemical-resistant suit; avoid all contact
Isolation: ERG 159: isolate spill 25m all directions; for large spill isolate 50m and evacuate 300m downwind initially
— Key Hazards —
• Inhalation of vapors or dust is extremely irritating.
• May cause burning of eyes and lachrymation (flow of tears).
• May cause coughing, difficult breathing and nausea.
— 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/1694 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1694 Bromobenzyl cyanides, liquid Cls6 ERG159 | allfirefighter.com/hazmat/un/1694SMS / 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/1694
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Frequently Asked Questions about UN 1694
Inhalation of vapors or dust is extremely irritating. May cause burning of eyes and lachrymation (flow of tears). May cause coughing, difficult breathing and nausea. Brief exposure effects last only a few minutes. Exposure in an enclosed area may be very harmful. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. Some of these materials may burn, but none ignite readily.
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 required for lachrymator exposure; full-face SCBA mandatory; chemical-resistant suit; avoid all contact
Water reactivity: No significant reaction with water; slightly soluble. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical, water spray for cooling.
ERG Guide 159 recommendation: ERG 159: isolate spill 25m all directions; for large spill isolate 50m and evacuate 300m downwind initially
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 159 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.