☣️ UN 3216 • CLASS 5
UN 3216 — Persulphates, inorganic, aqueous solution, n.o.s.
Placard: Oxidizer. ERG Guide 140. 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 3216 Quick Details
UN 3216
Product name: Persulphates, inorganic, aqueous solution, n.o.s.
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: isolate spill area 25-50m; if tank/rail car involved in fire, isolate 800m all directions
Common Hazards of UN 3216
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
Chemical Identity & Physical Properties
| Also known as | Inorganic persulfates solutionPeroxydisulfate solutionPerdisulfate solutionPersulfate salts aqueous solution |
| Appearance | Clear to pale yellow aqueous solution with little to no odor. Liquid at room temperature, oxidizing properties. |
| Flash Point | Not applicable (aqueous oxidizer solution) |
| Boiling Point | Approximately 100C (212F), varies with concentration |
| Vapor Density | Not applicable (aqueous solution) |
| Water Reactivity | Miscible with water; may release oxygen when heated in solution |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3216
Extinguishing Media
Water spray, dry chemical, CO2; avoid organic materials and combustibles
PPE Requirements
⚠️ Level B minimum; chemical-resistant suit, gloves, and boots; SCBA for fire or large spills
Isolation & Evacuation
ERG 140: isolate spill area 25-50m; if tank/rail car involved in fire, isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 3216 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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📋 Copy & Share Field Card
UN 3216 — Persulphates, inorganic, aqueous solutioHAZMAT RADIO NOTE — UN 3216
Product: Persulphates, inorganic, aqueous solution, n.o.s.
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum; chemical-resistant suit, gloves, and boots; SCBA for fire or large spills
ISOLATION: ERG 140: isolate spill area 25-50m; if tank/rail car involved in fire, isolate 800m all directions
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 3216 — Persulphates, inorganic, aqueous solution, n.o.s.
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: Clear to pale yellow aqueous solution with little to no odor. Liquid at room temperature, oxidizing properties.
Water Reactivity: Miscible with water; may release oxygen when heated in solution
Extinguishing: Water spray, dry chemical, CO2; avoid organic materials and combustibles
PPE: Level B minimum; chemical-resistant suit, gloves, and boots; SCBA for fire or large spills
Isolation: ERG 140: isolate spill area 25-50m; if tank/rail car involved in fire, isolate 800m all directions
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— 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/3216 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3216 Persulphates, inorganic, aqueous solution, n.o.s. Cls5 ERG140 | allfirefighter.com/hazmat/un/3216SMS / 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/3216
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Frequently Asked Questions about UN 3216
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
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; chemical-resistant suit, gloves, and boots; SCBA for fire or large spills
Water reactivity: Miscible with water; may release oxygen when heated in solution. Recommended extinguishing: Water spray, dry chemical, CO2; avoid organic materials and combustibles.
ERG Guide 140 recommendation: ERG 140: isolate spill area 25-50m; if tank/rail car involved in fire, isolate 800m all directions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.