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 reclassified as a Consumer Commodity, Mailable Limited Quantity, or ORM-D (surface only) material (see 333). Not every hazardous material permitted to be shipped as a limited quantity can qualify under the Consumer Commodity, Mailable Limited Quantity, or ORM-D categories. Except as specifically permitted in DMM 601.10 and this publication, materials that cannot be reclassified under the Consumer Commodity, Mailable Limited Quantity, or ORM-D categories are not eligible for mailing.