Hazmat UN Number Lookup
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🏷️ Primary Hazard Class Filter
UN1373
Fibers or Fabrics, animal or vegetable or Synthetic, n.o.s. with animal or vegetable oil
Spontaneously Combustible
Class 4.2PG III
CAS RegistryN/A (Mixture)
Hazchem / EAC1Y
ERG Guide Number133
49 CFR Placards & Labels
%20scale(0.66)%22%3E%3Cpath%20d%3D%22M2%2C-19%20C6%2C-10%2013%2C-8%2010%2C1%20C9%2C5%205%2C6%206%2C10%20C10%2C8%2013%2C3%2012%2C-3%20C16%2C4%2014%2C15%203%2C19%20C-9%2C18%20-14%2C9%20-10%2C-1%20C-8%2C-5%20-3%2C-4%20-4%2C-7%20C-5%2C-12%20-1%2C-15%202%2C-19%20Z%22%20fill%3D%22%23000000%22%2F%3E%3C%2Fg%3E%3Ctext%20text-anchor%3D%22middle%22%20font-family%3D%22Arial%2C%20Helvetica%2C%20sans-serif%22%20font-weight%3D%22700%22%20font-size%3D%226%22%20letter-spacing%3D%220.3%22%20fill%3D%22%23000000%22%3E%3Ctspan%20x%3D%2250%22%20y%3D%2256.5%22%3ESPONTANEOUSLY%3C%2Ftspan%3E%3Ctspan%20x%3D%2250%22%20y%3D%2264.2%22%3ECOMBUSTIBLE%3C%2Ftspan%3E%3C%2Ftext%3E%3Ctext%20x%3D%2250%22%20y%3D%2285%22%20text-anchor%3D%22middle%22%20font-family%3D%22Arial%2C%20Helvetica%2C%20sans-serif%22%20font-weight%3D%22800%22%20font-size%3D%2218%22%20fill%3D%22%23000000%22%3E4%3C%2Ftext%3E%3C%2Fsvg%3E)
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
III
Symbols (col 1)
A W
Labels (col 6)
4.2
PIH Zone
—
Packaging references (49 CFR §173.xxx)
Exceptions (col 8A)
None
Non-Bulk (col 8B)
§173.213
Bulk (col 8C)
§173.241
Aircraft quantity limits (col 9)
Passenger / Rail (9A)
Forbidden
Cargo Aircraft Only (9B)
Forbidden
Vessel stowage (col 10)
Location (10A)
A
Other codes (10B)
—
Hazard Classification & Risks
Class 4.2 — Spontaneously combustible; pyrophoric (ignites within 5 minutes of air contact) or self-heating (49 CFR §173.124). Packing Group III — minor danger.
Transport Regulations
Hazard class 4.2, Packing Group III. Placard/label codes: 4.2. Special provisions: 137, IB8, IP3, T1, TP33, W31. Packaging (49 CFR §173): exceptions §None, non-bulk §213, bulk §241. Quantity limits: passenger aircraft/rail Forbidden, cargo aircraft only Forbidden. Vessel stowage: A. 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.