☣️ UN 1967 • CLASS 2
Parathion and compressed gas mixture
Placard: Toxic Gas. 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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Quick details
UN 1967
Class: 2
Placard type: Toxic Gas
ERG: Guide 123 (check current ERG)
Isolation: ERG 123: isolate spill/leak area immediately for at least 100m in all directions; evacuate downwind areas; if tank/rail car involved, isolate 800m and consider evacuation for 1600m downwind
Chemical & Response Details
| Also known as | O,O-diethyl O-(4-nitrophenyl) phosphorothioateDiethyl parathionThiophosE605Folidol |
| CAS Number | 56-38-2 |
| Appearance | Pale yellow to dark brown liquid in normal form; when mixed with compressed gas, appears as pressurized aerosol or liquefied gas mixture. Characteristic garlic-like or petroleum odor. |
| Flash Point | Not applicable (compressed gas mixture) |
| Boiling Point | Not applicable (pressurized mixture) |
| Vapor Density | Heavier than air (compressed gas will settle in low areas) |
| Water Reactivity | Slowly hydrolyzes in water; no violent reaction but toxic decomposition products may form |
| Extinguishing | CO2, dry chemical, water spray acceptable for fire control; avoid high-pressure water streams |
| PPE | ⚠️ Level A required; full encapsulation, SCBA mandatory; chemical-resistant gloves and suits; extreme skin absorption hazard |
| Isolation | ERG 123: isolate spill/leak area immediately for at least 100m in all directions; evacuate downwind areas; if tank/rail car involved, isolate 800m and consider evacuation for 1600m downwind |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC; may be fatal if inhaled or absorbed through skin.
- Vapors may be irritating and/or corrosive.
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may cause environmental contamination.
- Some may burn but none ignite readily.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief
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.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 100 meters (330 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
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UN 1967 — Parathion and compressed gas mixture HAZMAT RADIO NOTE — UN 1967
Product: Parathion and compressed gas mixture
Class 2 / Toxic Gas / ERG 123
PPE: Level A required; full encapsulation, SCBA mandatory; chemical-resistant gloves and suits; extreme skin absorption hazard
ISOLATION: ERG 123: isolate spill/leak area immediately for at least 100m in all directions; evacuate downwind areas; if tank/rail car involved, isolate 800m and consider evacuation for 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 1967 — Parathion and compressed gas mixture
Class: 2 | Placard: Toxic Gas | ERG Guide: 123
Appearance: Pale yellow to dark brown liquid in normal form; when mixed with compressed gas, appears as pressurized aerosol or liquefied gas mixture. Characteristic garlic-like or petroleum odor.
Water Reactivity: Slowly hydrolyzes in water; no violent reaction but toxic decomposition products may form
Extinguishing: CO2, dry chemical, water spray acceptable for fire control; avoid high-pressure water streams
PPE: Level A required; full encapsulation, SCBA mandatory; chemical-resistant gloves and suits; extreme skin absorption hazard
Isolation: ERG 123: isolate spill/leak area immediately for at least 100m in all directions; evacuate downwind areas; if tank/rail car involved, isolate 800m and consider evacuation for 1600m downwind
— Key Hazards —
• TOXIC; may be fatal if inhaled or absorbed through skin.
• Vapors may be irritating and/or corrosive.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
— 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.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/1967 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1967 Parathion and compressed gas mixture Cls2 ERG123 | allfirefighter.com/hazmat/un/1967SMS / 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/1967
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FAQ
TOXIC; may be fatal if inhaled or absorbed through skin. Vapors may be irritating and/or corrosive. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief
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; full encapsulation, SCBA mandatory; chemical-resistant gloves and suits; extreme skin absorption hazard
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 123 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.