☣️ DOT Hazmat Classification
Miscellaneous
Wide range: lithium batteries, environmentally hazardous substances, elevated temperature materials—case-by-case.
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DOT CLASS 9
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Common Hazards — Class 9
- Diverse hazards depending on product
- Thermal runaway/fire in some battery incidents
- Environmental contamination risk
How to Recognize Class 9
- Class 9 placard
- Battery shipments, damaged EV packs, container labels
- Runoff/contamination concerns
First Actions Before Hazmat Team Arrives
Initial priorities for DOT Hazmat Class 9 (Miscellaneous) incidents. These are general guidelines — always verify with shipping papers, consult the current ERG, and follow your SOP/SOG.
- Isolate and size up carefully
- Request Hazmat for unknown or large incidents
- Consider extended operations for batteries (rekindle potential)
- Protect exposures and control runoff
- Consult ERG and follow SOP/SOG
What NOT To Do — Class 9
- Do not treat all Class 9 materials the same
- Do not underestimate battery rekindle risk
- Do not ignore environmental impacts
Common Examples — Class 9 Miscellaneous
Lithium-ion batteriesDry ice (some cases)Environmental hazard substancesHot asphalt (varies)
These are representative examples only. Product-specific hazards vary — always confirm via shipping papers and current ERG.
Common UN Numbers in Class 9 (Miscellaneous)
UN 1350SulphurUN 1365Cotton, wetUN 1841Acetaldehyde ammoniaUN 1845Carbon dioxide, solidUN 1931Zinc hydrosulphiteUN 1941DibromodifluoromethaneUN 1990BenzaldehydeUN 2071Ammonium nitrate based fertilizerUN 2211Polymeric beads, expandableUN 2212Asbestos, amphiboleUN 2216Fish scrap, stabilizedUN 2315Polychlorinated biphenyls, liquidUN 2448Sulphur, moltenUN 2590Asbestos, chrysotileUN 2807Magnetized material
More UN numbers discoverable via the Hazmat Hub. Always consult current ERG + SOP/SOG for operations.
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FAQ — DOT Hazmat Class 9 (Miscellaneous)
It includes materials that present hazards during transport but don’t fit neatly into Classes 1–8.
Yes—thermal runaway can re-ignite; follow SOP/SOG and product guidance for cooling/monitoring.
Isolate, request Hazmat if needed, protect exposures, and use ERG/SOP guidance.
Sources: DOT/PHMSA hazard class concepts, NFPA 704 overview, and ERG usage principles. This guide does not reproduce ERG guide text — always consult the current ERG for incident-specific protective actions.