Hazmat UN Number Lookup

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🏷️ Primary Hazard Class Filter

UN3476

Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substances

Dangerous When Wet

Class 4.3

CAS RegistryN/A

Hazchem / EAC4W

ERG Guide Number138

49 CFR Placards & Labels

Dangerous When WetClass 4.3

⇩ 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)

4.3

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.230

Non-Bulk (col 8B)

§173.230

Bulk (col 8C)

§173.230

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

5 kg

Cargo Aircraft Only (9B)

50 kg

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

13, 148

Special provisions (col 7 — §172.102)

328

Hazard Classification & Risks

Class 4.3 — Dangerous when wet. Contact with water emits flammable or toxic gas (49 CFR §173.124).

Transport Regulations

Hazard class 4.3. Placard/label codes: 4.3. Special provisions: 328. Packaging (49 CFR §173): exceptions §230, non-bulk §230, bulk §230. Quantity limits: passenger aircraft/rail 5 kg, cargo aircraft only 50 kg. Vessel stowage: A (other: 13, 148). Classified per 49 CFR §172.101.

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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)

4.3

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.230

Non-Bulk (col 8B)

§173.230

Bulk (col 8C)

§173.230

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

5 kg

Cargo Aircraft Only (9B)

50 kg

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

13, 148

Special provisions (col 7 — §172.102)

328

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.