☣️ UN 1583 • CLASS 6
UN 1583 — Chloropicrin mixture, n.o.s.
Placard: Toxic. ERG Guide 154. 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 1583 Quick Details
UN 1583
Product name: Chloropicrin mixture, n.o.s.
DOT Class: 6
Placard type: Toxic
ERG Guide: 154 (check current ERG)
Initial isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
Common Hazards of UN 1583
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- 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
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.).
- Corrosives in contact with metals may evolve flammable hydrogen gas.
Chemical Identity & Physical Properties
| Also known as | TrichloronitromethaneNitrochloroformPSNitrotrichloromethaneAcquinite |
| CAS Number | 76-06-2 |
| Appearance | Colorless to faintly yellow oily liquid with an intensely irritating odor. Slightly volatile at room temperature. Non-flammable but decomposes on heating. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 112C (234F) |
| Vapor Density | 5.7 (much heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water; no violent reaction |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1583
Extinguishing Media
Water spray, dry chemical, CO2; foam not typically required for non-flammable liquid
PPE Requirements
⚠️ Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact
Isolation & Evacuation
ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 154).
First Actions for a UN 1583 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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UN 1583 — Chloropicrin mixture, n.o.s.HAZMAT RADIO NOTE — UN 1583
Product: Chloropicrin mixture, n.o.s.
Class 6 / Toxic / ERG 154
PPE: Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact
ISOLATION: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
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 1583 — Chloropicrin mixture, n.o.s.
Class: 6 | Placard: Toxic | ERG Guide: 154
Appearance: Colorless to faintly yellow oily liquid with an intensely irritating odor. Slightly volatile at room temperature. Non-flammable but decomposes on heating.
Water Reactivity: Hydrolyzes slowly in water; no violent reaction
Extinguishing: Water spray, dry chemical, CO2; foam not typically required for non-flammable liquid
PPE: Level A required; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact
Isolation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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/1583 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1583 Chloropicrin mixture, n.o.s. Cls6 ERG154 | allfirefighter.com/hazmat/un/1583SMS / 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/1583
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Frequently Asked Questions about UN 1583
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury 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 Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Corrosives in contact with metals may evolve flammable hydrogen gas.
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; SCBA mandatory; full encapsulation due to extreme toxicity; avoid all skin and eye contact
Water reactivity: Hydrolyzes slowly in water; no violent reaction. Recommended extinguishing: Water spray, dry chemical, CO2; foam not typically required for non-flammable liquid.
ERG Guide 154 recommendation: ERG 154: isolate spill 25-50m all directions; evacuate immediate area; public protective action distance 0.1-0.3 km downwind for small spills, 0.5-1.6 km for large spills
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 154 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.