☣️ UN 2448 • CLASS 9
Sulphur, molten
Placard: Miscellaneous. 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 2448
Class: 9
Placard type: Miscellaneous
ERG: Guide 133 (check current ERG)
Isolation: ERG 133: isolate spill area 25-50m in all directions; for large spills consider initial downwind evacuation 300m
Chemical & Response Details
| Also known as | Molten sulfurMolten sulphurBrimstone (molten)Elemental sulfur (molten) |
| CAS Number | 7704-34-9 |
| Appearance | Molten yellow liquid at elevated temperature (above 119°C/246°F), viscous consistency. Solidifies to yellow crystalline solid at room temperature. May emit sulfur dioxide fumes when heated. |
| Flash Point | Not applicable (combustible solid/liquid above melting point) |
| Boiling Point | 444.6°C (832.3°F) |
| Vapor Density | Not applicable (minimal vapor pressure below boiling point) |
| Water Reactivity | No significant reaction with water, though contact may cause violent steam generation due to high temperature of molten material |
| Extinguishing | Dry chemical, CO2, sand, or dry earth; water spray for cooling containers only |
| PPE | ⚠️ Level B minimum; full protective clothing and SCBA required; thermal protection for molten material contact; protection against sulfur dioxide fumes |
| Isolation | ERG 133: isolate spill area 25-50m in all directions; for large spills consider initial downwind evacuation 300m |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be ignited by friction, heat, sparks or flames.
- Some may burn rapidly with flare-burning effect.
- Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence.
- Substance may be transported in a molten form at a temperature that may be above its flash point.
- May re-ignite after fire is extinguished.
- Fire may produce irritating and/or toxic gases.
- Contact may cause burns to skin and eyes.
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 for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 2448 — Sulphur, molten HAZMAT RADIO NOTE — UN 2448
Product: Sulphur, molten
Class 9 / Miscellaneous / ERG 133
PPE: Level B minimum; full protective clothing and SCBA required; thermal protection for molten material contact; protection against sulfur dioxide fumes
ISOLATION: ERG 133: isolate spill area 25-50m in all directions; for large spills consider initial downwind evacuation 300m
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 2448 — Sulphur, molten
Class: 9 | Placard: Miscellaneous | ERG Guide: 133
Appearance: Molten yellow liquid at elevated temperature (above 119°C/246°F), viscous consistency. Solidifies to yellow crystalline solid at room temperature. May emit sulfur dioxide fumes when heated.
Water Reactivity: No significant reaction with water, though contact may cause violent steam generation due to high temperature of molten material
Extinguishing: Dry chemical, CO2, sand, or dry earth; water spray for cooling containers only
PPE: Level B minimum; full protective clothing and SCBA required; thermal protection for molten material contact; protection against sulfur dioxide fumes
Isolation: ERG 133: isolate spill area 25-50m in all directions; for large spills consider initial downwind evacuation 300m
— Key Hazards —
• Flammable/combustible material.
• May be ignited by friction, heat, sparks or flames.
• Some may burn rapidly with flare-burning effect.
— 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 for at least 25 meters (75 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/2448 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2448 Sulphur, molten Cls9 ERG133 | ERG 133: isolate spill area 25-50m in all directions; for large spills consider | allfirefighter.com/hazmat/un/2448SMS / 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/2448
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FAQ
Flammable/combustible material. May be ignited by friction, heat, sparks or flames. Some may burn rapidly with flare-burning effect. Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. Substance may be transported in a molten form at a temperature that may be above its flash point. May re-ignite after fire is extinguished. Fire may produce irritating and/or toxic gases. Contact may cause burns to skin and eyes.
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; full protective clothing and SCBA required; thermal protection for molten material contact; protection against sulfur dioxide fumes
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 133 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.