ORM-C shipping labels. The abbreviation for Other Regulated Material - Class C. An ORM-C material is one whose characteristics do not fit the ORM-A or ORM-B classification but nonetheless make it unsuitable for shipment unless properly identified and packaged. Uncleaned or used burlap bags are an example of ORM-C.

The Other Regulated Material ORM-C is also known as the ORM ORM-C