The miscellaneous hazardous materials category encompasses all hazardous materials that do not fit one of the definitions listed in Class 1 through Class 8.
Divisions
The miscellaneous hazardous material is a material that presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes:
Any material which has an anesthetic, noxious or other similar property which could cause extreme annoyance or discomfort to a flight crew member so as to prevent the correct performance of assigned duties; or
Any material that meets the definition in 49 CFR 171.8 for an elevated temperature material, a hazardous substance, a hazardous waste, or a marinepollutant.
A new sub-class, class 9A, has been in effect since January 1, 2017. This is limited to the labeling of the transport of lithium batteries.
Placards
Hazardous Materials
Class 9: Miscellaneous
Compatibility Table
Load and Segregation Chart
Weight
1.1
1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.2
2.3
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8
A
B
A
9
Key
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.
Source: United States Code of Federal Regulations, Title 49 CFR §177.848 - Segregation of hazardous materials.[1]
Packing Groups
The packing group of a Class 9 material is as indicated in Column 5 of the 49CFR 172.101 Table.