Hazmat UN Number Lookup

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🏷️ Primary Hazard Class Filter

UN3487

Calcium hypochlorite, hydrated, corrosive or Calcium hypochlorite, hydrated mixture, corrosive with not less than 5.5% but not more than 16% water

Oxidizers

Class 5.1 (Primary)Class 8 (Subsidiary)PG II

CAS RegistryN/A

Hazchem / EAC1E

ERG Guide Number140

49 CFR Placards & Labels

OxidizerClass 5.1

⇩ SVG

CorrosiveClass 8

⇩ SVG

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

Marine Pollutant

Marine-pollutant mark (§172.322) required for bulk packages by vessel; IMDG segregation and stowage rules apply.

Regulatory Facts

Packing Group

Symbols (col 1)

—

Labels (col 6)

5.1, 8

PIH Zone

—

Packaging references (49 CFR §173.xxx)

Exceptions (col 8A)

§173.152

Non-Bulk (col 8B)

§173.212

Bulk (col 8C)

§173.240

Aircraft quantity limits (col 9)

Passenger / Rail (9A)

5 kg

Cargo Aircraft Only (9B)

25 kg

Vessel stowage (col 10)

Location (10A)

Other codes (10B)

4, 25, 52, 56, 58, 69, 142

Special provisions (col 7 — §172.102)

165 IB8 IP2 IP4 IP13 W9

Hazard Classification & Risks

Class 5.1 — Oxidizer. Yields oxygen and may cause or intensify the combustion of other materials (49 CFR §173.127). Packing Group II — medium danger.

Transport Regulations

Hazard class 5.1, Packing Group II. Placard/label codes: 5.1, 8. Special provisions: 165, IB8, IP2, IP4, IP13, W9. Packaging (49 CFR §173): exceptions §152, non-bulk §212, bulk §240. Quantity limits: passenger aircraft/rail 5 kg, cargo aircraft only 25 kg. Vessel stowage: D (other: 4, 25, 52, 56, 58, 69, 142). 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.