Hazmat UN Number Lookup

Search hazardous materials database, check safety specifications, and view Emergency Response guides.

🏷️ Primary Hazard Class Filter

UN3499

Capacitor, electric double layer with an energy storage capacity greater than 0.3 Wh

Miscellaneous Dangerous Goods

Class 9

CAS RegistryN/A

Hazchem / EAC2Z

ERG Guide Number171

49 CFR Placards & Labels

MiscellaneousClass 9

⇩ SVG

Not listed as a Reportable Quantity (RQ) hazardous substance under §172.101 Appendix A.

Not listed as a Marine Pollutant under §172.101 Appendix B.

Regulatory Facts

Packing Group

—

Symbols (col 1)

—

Labels (col 6)

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.176

Non-Bulk (col 8B)

§173.176

Bulk (col 8C)

§173.176

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

No limit

Cargo Aircraft Only (9B)

No limit

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

—

Special provisions (col 7 — §172.102)

361

Hazard Classification & Risks

Class 9 — Miscellaneous dangerous goods that present a transport hazard not covered by other classes (e.g. elevated-temperature, environmentally hazardous, lithium batteries) (49 CFR §173.140).

Transport Regulations

Hazard class 9. Placard/label codes: 9. Special provisions: 361. Packaging (49 CFR §173): exceptions §176, non-bulk §176, bulk §176. Quantity limits: passenger aircraft/rail No limit, cargo aircraft only No limit. Vessel stowage: A. Classified per 49 CFR §172.101.

Shortcuts:

p Printd SVGc Copy Names Copy Spilla Copy First-Aid

Source & sourcing note

Regulatory data mirrors the U.S. 49 CFR §172.101 Hazardous Materials Table and companion columns (packaging, quantity limits, vessel stowage, special provisions) as published by the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA).

Emergency-response content is drawn from the 2024 Emergency Response Guidebook (ERG), a joint publication of PHMSA, Transport Canada, and Mexico’s SCT.

The U.S. edition of the ERG and all U.S. federal regulations are public-domain works under 17 U.S.C. §105. Descriptions on this page are plain-English paraphrases; for any compliance decision, consult the authoritative text on eCFR Title 49 and the ERG at PHMSA.dot.gov. “ERG™” is attributed to PHMSA / Transport Canada / SCT and used nominatively.

Regulatory Facts

Packing Group

—

Symbols (col 1)

—

Labels (col 6)

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.176

Non-Bulk (col 8B)

§173.176

Bulk (col 8C)

§173.176

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

No limit

Cargo Aircraft Only (9B)

No limit

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

—

Special provisions (col 7 — §172.102)

361

Source & sourcing note

Emergency-response content is drawn from the 2024 Emergency Response Guidebook (ERG), a joint publication of PHMSA, Transport Canada, and Mexico’s SCT.