UN 1748Calcium hypochlorite, dry or Calcium hypochlorite mixtures dry with more than 39 percent available chlorine (8.8 percent available oxygen)
Proper shipping name: Calcium hypochlorite, dry or Calcium hypochlorite mixture dry
Division 5.1
Oxidizing substances
Summary
UN 1748 is the UN number for calcium hypochlorite, dry or Calcium hypochlorite mixtures dry with more than 39 percent available chlorine (8.8 percent available oxygen). It is classed in Division 5.1 (oxidizing substances) of Class 5 for transport. Packing group II or III, depending on the form. Emergency responders use ERG guide 140.
Emergency response
The Emergency Response Guidebook (ERG2024) guide for this number:
- Guide140Calcium hypochlorite, dryCalcium hypochlorite mixture, dry, with more than 39% available chlorine (8.8% available oxygen)
From the 2024 Emergency Response Guidebook (ERG2024), published by U.S. Department of Transportation, PHMSA. Read the full guide in the ERG or on CAMEO Chemicals.
Identification
- UN number
- UN 1748
- Name
- Calcium hypochlorite, dry or Calcium hypochlorite mixtures dry with more than 39 percent available chlorine (8.8 percent available oxygen)
- Hazard class
- Class 5: Oxidizers and organic peroxides
- Division
- 5.1: Oxidizing substances
- Packing group
- II, III
- What the class covers
- Substances which may cause or contribute to the combustion of other material, generally by yielding oxygen.
U.S. Hazardous Materials Table
2 entries share this number in 49 CFR 172.101, by name, packing group or where the shipment is going.
UN1748Calcium hypochlorite, dry or Calcium hypochlorite mixture dry
with more than 39% available chlorine (8.8% available oxygen)
Special provisions: 165, 166, A7, A9, IB8, IP2, IP4, IP13, N34, W9
- Class
- 5.1
- Packing group
- II
- Labels
- 5.1
UN1748Calcium hypochlorite, dry or Calcium hypochlorite mixture dry
with more than 39% available chlorine (8.8% available oxygen)
Special provisions: 165, 171, A7, A9, IB8, IP4, IP13, N34, W9
- Class
- 5.1
- Packing group
- III
- Labels
- 5.1
From the eCFR edition of 49 CFR 172.101 dated 2026-10-05 (section last amended 2026-09-08). The eCFR is an editorial compilation, not the official legal edition. Read the current table.
About Class 5
Class 5 covers substances that supply oxygen or otherwise intensify a fire. Division 5.1 is oxidizers such as ammonium nitrate and hydrogen peroxide; 5.2 is organic peroxides, which may also be thermally unstable.
Check the official sources
For emergency response, packaging and quantity limits, use these:
- CAMEO Chemicals: UN/NA 1748NOAA datasheets with the ERG response guide and isolation distances
- Emergency Response Guidebook (ERG)PHMSA's guide for first responders, free as a PDF or app
- 49 CFR 172.101 Hazardous Materials TableThe legal U.S. entry: proper shipping name, packing group, labels and special provisions