☣️ UN 1714 • CLASS 4
Zinc phosphide
Placard: Dangerous When Wet. 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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Quick details
UN 1714
Class: 4
Placard type: Dangerous When Wet
ERG: Guide 139 (check current ERG)
Isolation: ERG 139: isolate spill 25m all directions; if fire or water-reactive incident, isolate 800m and consider evacuation 1600m downwind
Chemical & Response Details
| Also known as | Zinc phosphideTrizinc diphosphidePhosphure de zincRatolGopha-Rid |
| CAS Number | 1314-84-7 |
| Appearance | Dark gray or black crystalline powder with a slight odor of phosphine or garlic. Solid at room temperature. |
| Flash Point | Not applicable (reactive solid) |
| Boiling Point | 1100C (2012F) - decomposes before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with water and moisture to produce toxic phosphine gas (PH3) and heat; may ignite spontaneously |
| Extinguishing | Dry chemical, sand, dry dolomite; DO NOT USE WATER or foam |
| PPE | ⚠️ Level B minimum with SCBA required; full chemical protective suit if phosphine gas release suspected |
| Isolation | ERG 139: isolate spill 25m all directions; if fire or water-reactive incident, isolate 800m and consider evacuation 1600m downwind |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Produce flammable and toxic gases on contact with water.
- May ignite on contact with water or moist air.
- Some react vigorously or explosively on contact with water.
- May be ignited by heat, sparks or flames.
- May re-ignite after fire is extinguished.
- Some are transported in highly flammable liquids.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
First actions (field-minded)
- 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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UN 1714 — Zinc phosphide HAZMAT RADIO NOTE — UN 1714
Product: Zinc phosphide
Class 4 / Dangerous When Wet / ERG 139
PPE: Level B minimum with SCBA required; full chemical protective suit if phosphine gas release suspected
ISOLATION: ERG 139: isolate spill 25m all directions; if fire or water-reactive incident, isolate 800m and consider evacuation 1600m 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 1714 — Zinc phosphide
Class: 4 | Placard: Dangerous When Wet | ERG Guide: 139
Appearance: Dark gray or black crystalline powder with a slight odor of phosphine or garlic. Solid at room temperature.
Water Reactivity: Reacts with water and moisture to produce toxic phosphine gas (PH3) and heat; may ignite spontaneously
Extinguishing: Dry chemical, sand, dry dolomite; DO NOT USE WATER or foam
PPE: Level B minimum with SCBA required; full chemical protective suit if phosphine gas release suspected
Isolation: ERG 139: isolate spill 25m all directions; if fire or water-reactive incident, isolate 800m and consider evacuation 1600m downwind
— Key Hazards —
• Produce flammable and toxic gases on contact with water.
• May ignite on contact with water or moist air.
• Some react vigorously or explosively on contact with water.
— 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/1714 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1714 Zinc phosphide Cls4 ERG139 | ERG 139: isolate spill 25m all directions; if fire or water-reactive incident, i | allfirefighter.com/hazmat/un/1714SMS / 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/1714
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FAQ
Produce flammable and toxic gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Containers may explode when heated. Runoff 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 B minimum with SCBA required; full chemical protective suit if phosphine gas release suspected
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 139 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.