49 CFR § 173.4b - De minimis exceptions.
(a) Packing Group II and III materials in Class 3, Division 4.1, Division 4.2, Division 4.3, Division 5.1, Division 6.1, Class 8, and Class 9 do not meet the definition of a hazardous material in § 171.8 of this subchapter when packaged in accordance with this section and, therefore, are not subject to the requirements of this subchapter.
(1) The maximum quantity of material per inner receptacle or article is limited to—
(i) One (1) mL (0.03 ounce) for authorized liquids; and
(ii) One (1) g (0.04 ounce) for authorized solid materials;
(i) Will not react chemically with the material, and
(ii) Is capable of absorbing the entire contents (if a liquid) of the receptacle;
(5) The completed package is capable of sustaining—
(i) Each of the following free drops made from a height of 1.8 m (5.9 feet) directly onto a solid unyielding surface without breakage or leakage from any inner receptacle and without a substantial reduction in the effectiveness of the package:
(A) One drop flat on bottom;
(B) One drop flat on top;
(C) One drop flat on the long side;
(D) One drop flat on the short side; and
(E) One drop on a corner at the junction of three intersecting edges; and
(ii) A compressive load as specified in § 178.606(c) of this subchapter. Each of the tests in this paragraph (a)(5) may be performed on a different but identical package; that is, all tests need not be performed on the same package.
(8) The gross mass of the completed package does not exceed 29 kg (64 pounds);
(10) For transportation by aircraft:
(ii) Material packed in accordance with this section may not be carried in checked or carry-on baggage.
(b) Non-infectious specimens, such as specimens of mammals, birds, amphibians, reptiles, fish, insects and other invertebrates containing small quantities of Ethanol (UN1170), Formaldehyde solution, flammable (UN1198), Alcohols, n.o.s. (UN1987) and Isopropanol (UN1219) are not subject to the requirements of this subchapter provided the following packaging, marking and documentation provisions, as applicable, are met:
(1) The specimens are:
(2) The bagged specimens are placed in another plastic bag with sufficient absorbent material to absorb the entire liquid contents inside the primary receptacle. The outer plastic bag is then heat-sealed;
(i) For transportation by highway or rail, no shipping paper is required.
(ii) For transport by air, a shipping paper is not required, except that, if a document such as an air waybill accompanies a shipment of specimens containing hazardous materials excepted under the terms of this section, the document must include the statement “Scientific research specimens, 49 CFR 173.4b applies” and the number of packages indicated.
(iii) For transport by vessel, a shipping paper is not required; however, the Dangerous Cargo Manifest must include the statement “Scientific research specimens, 49 CFR 173.4b applies” and the number of packages indicated. Vessel stowage is the same as for hazardous materials in excepted quantities.
(8) Restrictions. Except as provided in § 175.10, for transportation by aircraft, hazardous material packaged in accordance with this section may not be carried in checked or carry-on baggage by a passenger or crew member.