☣️ UN 2931 • CLASS 6
Vanadyl sulphate
Placard: Toxic. 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 2931
Class: 6
Placard type: Toxic
ERG: Guide 151 (check current ERG)
Isolation: ERG 151: Isolate spill area immediately for at least 25-50m in all directions. If fire or large spill, isolate 800m in all directions and consider evacuation.
Chemical & Response Details
| Also known as | Vanadium oxysulfateVanadyl sulfateVanadium oxide sulfateVOSO4 |
| CAS Number | 27774-13-6 |
| Appearance | Blue to green crystalline solid or powder. Odorless. Hygroscopic in nature and absorbs moisture from air. |
| Flash Point | Not applicable (inorganic solid) |
| Boiling Point | Decomposes before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water, forming acidic solution. No violent reaction but solution is corrosive. |
| Extinguishing | Dry chemical, CO2, water spray acceptable for fire. Avoid direct contact with material. |
| PPE | ⚠️ Level B minimum required. Full protective clothing, chemical-resistant gloves, boots, SCBA. Avoid all skin contact due to high toxicity. |
| Isolation | ERG 151: Isolate spill area immediately for at least 25-50m in all directions. If fire or large spill, isolate 800m in all directions and consider evacuation. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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
- Containers may explode when heated.
- Runoff may pollute waterways.
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.
- 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 2931 — Vanadyl sulphate HAZMAT RADIO NOTE — UN 2931
Product: Vanadyl sulphate
Class 6 / Toxic / ERG 151
PPE: Level B minimum required. Full protective clothing, chemical-resistant gloves, boots, SCBA. Avoid all skin contact due to high toxicity.
ISOLATION: ERG 151: Isolate spill area immediately for at least 25-50m in all directions. If fire or large spill, isolate 800m in all directions and consider evacuation.
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 2931 — Vanadyl sulphate
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Blue to green crystalline solid or powder. Odorless. Hygroscopic in nature and absorbs moisture from air.
Water Reactivity: Soluble in water, forming acidic solution. No violent reaction but solution is corrosive.
Extinguishing: Dry chemical, CO2, water spray acceptable for fire. Avoid direct contact with material.
PPE: Level B minimum required. Full protective clothing, chemical-resistant gloves, boots, SCBA. Avoid all skin contact due to high toxicity.
Isolation: ERG 151: Isolate spill area immediately for at least 25-50m in all directions. If fire or large spill, isolate 800m in all directions and consider evacuation.
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— 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.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/2931 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2931 Vanadyl sulphate Cls6 ERG151 | ERG 151: Isolate spill area immediately for at least 25-50m in all directions. I | allfirefighter.com/hazmat/un/2931SMS / 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/2931
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FAQ
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. 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 Containers may explode when heated. Runoff may pollute waterways.
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 required. Full protective clothing, chemical-resistant gloves, boots, SCBA. Avoid all skin contact due to high toxicity.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.