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'''Radioactive substances''' are materials that emit [[radiation]].

==Divisions==
[[File:Radioactive HAZMAT labels on navy containers.jpg|thumbnail|left|Radioactive label on containers aboard a US Navy ship.]]
Any quantity of packages bearing the RADIOACTIVE YELLOW III label (LSA-III).

Some [[Radionuclide|radioactive materials]] in "exclusive use" with low [[specific activity]] radioactive materials will not bear the label, however, the RADIOACTIVE placard is required.

==Placards==

{| class=wikitable align=center
|-
| {{HAZMAT Cat 7}}
|}

==Compatibility Table==
{| width=99% align=center class=wikitable
|-
! colspan=23 | Load and Segregation Chart
|-
! rowspan=2 width=4% |  
! colspan=2 rowspan=2 | '''Weight'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.1'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.2'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.3'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.4'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.5'''
| rowspan=2 style="text-align:center;background-color:orange;" width=4% | '''1.6'''
| rowspan=2 style="text-align:center;background-color:red;" width=4% | '''2.1'''
| rowspan=2 style="text-align:center;background-color:green;color:white;" width=4% | '''2.2'''
| rowspan=2 style="text-align:center;background-color:yellow;" width=4% | '''2.2'''
| colspan=2 style="text-align:center;background-color:white;" width=8% | '''2.3'''
| rowspan=2 style="text-align:center;background-color:red;" width=4% | '''3'''
| rowspan=2 style="text-align:center;background-color:red;" width=4% | '''4.1'''
| rowspan=2 style="text-align:center;background-color:red;" width=4% | '''4.2'''
| rowspan=2 style="text-align:center;background-color:blue;color:white;" width=4% | '''4.3'''
| rowspan=2 style="text-align:center;background-color:yellow;" width=4% | '''5.1'''
| rowspan=2 style="text-align:center;background-color:yellow;" width=4% | '''5.2'''
| style="text-align:center;background-color:white;" width=4% | '''6.1'''
| rowspan=2 style="text-align:center;background-color:yellow;" width=4% | '''7'''
| rowspan=2 style="text-align:center;background-color:white;" width=4% | '''8'''
|-
| style="text-align:center;background-color:white;" width=4% | '''A'''
| style="text-align:center;background-color:white;" width=4% | '''B'''
| style="text-align:center;background-color:white;" | '''A'''
|-
| style="text-align:center;" | '''7 - I'''
| style="text-align:center;" | '''N/A''' || style="text-align:center;" width=4% | '''B''' || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |  
|-
| style="text-align:center;background-color:yellow;" | '''7 - II'''
| style="text-align:center;background-color:yellow;" | '''N/A''' || style="text-align:center;" width=4% | '''B''' || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |  
|-
| style="text-align:center;background-color:yellow;" | '''7 - III'''
| style="text-align:center;background-color:yellow;" | '''Any Quantity''' || style="text-align:center;" width=4% | '''B''' || {{na}} || {{na}} || style="text-align:center;" |   || style="text-align:center;" |   || {{na}} || style="text-align:center;" |   || style="text-align:center;" | '''O''' || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |   || style="text-align:center;" |  
|-
! colspan=23 | Key
|-
| colspan=23 | The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.

*'''X''': These materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.
*'''O''': Indicates that these materials may not be loaded, transported or stored together in the same transport vehicle or storage facility during the course of transportation, unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.
*'''B''': Radioactive I and II are not required to be placarded, and does not have segregation requirements. Radioactive III must be placarded in any quantity.
**'''I''' - Extremely low radiation levels: {{convert|0.5|mrem|mSv}} per hour.
**'''II''' - Low radiation levels: >{{convert|0.5|-|50|mrem|mSv}} per hour, on surface. {{convert|1.0|mrem|mSv}} maximum at {{convert|1|meter|ft|order=flip}}.
**'''III''' - Higher radiation levels: >{{convert|50|-|200|mrem|mSv}}, on surface. {{convert|10|mrem|mSv}} maximum at {{convert|1|meter|ft|order=flip}}.<ref>{{cite web |last1=Federal Emergency Management Agency |last2=United States Department of Energy |author-link1=Federal Emergency Management Agency |author-link2=United States Department of Energy |title=Radioactive Materials - Transport and Incident Response |url=https://www.energy.gov/sites/prod/files/em/TEPP/RadioactiveMaterialTransportationandIncidentResponse-QABook.pdf |access-date=20 July 2019 |archive-url=https://web.archive.org/web/20170508120459/https://www.energy.gov/sites/prod/files/em/TEPP/RadioactiveMaterialTransportationandIncidentResponse-QABook.pdf |archive-date=8 May 2017 |page=14 |language=en |format=PDF |date=June 2010}}</ref>

<br><small>'''Source:''' United States Code of Federal Regulations, Title 49 CFR §177.848 - Segregation of hazardous materials.<ref>{{cite web |last1=Pipeline and Hazardous Materials Safety Administration (PHMSA) |author-link1=Pipeline and Hazardous Materials Safety Administration |title=49 CFR 177.848 - Segregation of hazardous materials |url=https://www.govinfo.gov/content/pkg/CFR-2011-title49-vol2/pdf/CFR-2011-title49-vol2-sec177-848.pdf |publisher=Government Publishing Office |page=853 |access-date=16 July 2019 |archive-url=https://web.archive.org/web/20190716093805/https://www.govinfo.gov/content/pkg/CFR-2011-title49-vol2/pdf/CFR-2011-title49-vol2-sec177-848.pdf |archive-date=16 July 2019 |format=PDF |date=October 1, 2011}}</ref></small>
|}

==References==
{{Reflist}}

*49CFR 173 Subpart I

{{Hazardous materials}}

[[Category:Hazardous materials]]

HAZMAT Class 7 Radioactive substances - Revision history

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