A limited quantity of a hazardous material is the maximum amount of a specific hazardous material exempted from DOT labeling or packaging requirements in 49 CFR. To be eligible to be shipped under DOT’s limited quantity provision, a hazardous material must be authorized an exemption in column 8A of the Hazardous Materials Table in 49 CFR 172.101. Not every hazardous material is eligible to be shipped as a limited quantity.
Under Postal Service standards, a material meeting the eligibility criteria for shipment as a limited quantity is mailable only if it can be further reclassed as an ORM–D material (see 333). Not every hazardous material permitted to be shipped as a limited quantity can qualify as an ORM–D material.
Except as specifically permitted in DMM 601.10 and this publication, materials that cannot be reclassed as an ORM–D material are not eligible for mailing.