Some of the hazardous materials that qualify under the limited quantity provision are permitted a further exemption in 49 CFR 172.101 (column 8A) to be reclassified as an ORM–D material under 49 CFR 173.144 and renamed with the proper shipping name “Consumer Commodity,” which is defined in Appendix D. A mailable ORM–D material is additionally subject to the mailability and quantity limits in DMM 601.10 and this publication, as applicable.
Most mailable hazardous materials fall within the ORM–D category. ORM–D materials present the lowest level of risk during transportation. The ORM–D category is unique to the United States. Its use is prohibited with international shipments of hazardous materials.
