☣️ UN 1350 • CLASS 9
Sulphur
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 1350
Class: 9
Placard type: Miscellaneous
ERG: Guide 133 (check current ERG)
Isolation: ERG 133: Small spill isolate 30m all directions. Large spill isolate 100m all directions. Fire: isolate 800m if tank/rail car involved.
Chemical & Response Details
| Also known as | SulfurBrimstoneSulphur flowersColloidal sulfurElemental sulfur |
| CAS Number | 7704-34-9 |
| Appearance | Yellow crystalline solid or powder with no odor at room temperature. May appear as lumps, powder, or molten liquid when heated. |
| Flash Point | Not applicable (solid, ignition temperature ~190C/374F) |
| Boiling Point | 444.6C (832.3F) |
| Vapor Density | Not applicable (solid at room temperature) |
| Water Reactivity | No significant reaction with water. Insoluble in water. |
| Extinguishing | Dry chemical, CO2, sand, or water spray. Foam not typically required for solid sulfur. |
| PPE | ⚠️ Level D minimum for handling; Level C or B if dust/fumes present. SCBA if fire involves sulfur producing SO2. |
| Isolation | ERG 133: Small spill isolate 30m all directions. Large spill isolate 100m all directions. Fire: isolate 800m if tank/rail car involved. |
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 1350 — Sulphur HAZMAT RADIO NOTE — UN 1350
Product: Sulphur
Class 9 / Miscellaneous / ERG 133
PPE: Level D minimum for handling; Level C or B if dust/fumes present. SCBA if fire involves sulfur producing SO2.
ISOLATION: ERG 133: Small spill isolate 30m all directions. Large spill isolate 100m all directions. Fire: isolate 800m if tank/rail car involved.
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 1350 — Sulphur
Class: 9 | Placard: Miscellaneous | ERG Guide: 133
Appearance: Yellow crystalline solid or powder with no odor at room temperature. May appear as lumps, powder, or molten liquid when heated.
Water Reactivity: No significant reaction with water. Insoluble in water.
Extinguishing: Dry chemical, CO2, sand, or water spray. Foam not typically required for solid sulfur.
PPE: Level D minimum for handling; Level C or B if dust/fumes present. SCBA if fire involves sulfur producing SO2.
Isolation: ERG 133: Small spill isolate 30m all directions. Large spill isolate 100m all directions. Fire: isolate 800m if tank/rail car involved.
— 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/1350 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1350 Sulphur Cls9 ERG133 | ERG 133: Small spill isolate 30m all directions. Large spill isolate 100m all di | allfirefighter.com/hazmat/un/1350SMS / 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/1350
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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 D minimum for handling; Level C or B if dust/fumes present. SCBA if fire involves sulfur producing SO2.
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.